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138 results on '"Station de Biologie Marine de Concarneau"'

1. Analyse par imagerie hyperspectrale sous-marine : Révéler la variabilité de l'efficacité des récifs artificiels

Author: Elisabeth RIERA, Cédric Hubas, Mischa Ungerman, Guy Rigot, Alexis Pey, Patrice Francour, Francesca Rossi, Ecology and Conservation Science for Sustainable Seas (ECOSEAS), Centre National de la Recherche Scientifique (CNRS)-Université Côte d'Azur (UCA), Biologie des Organismes et Ecosystèmes Aquatiques (BOREA), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA), Station de Biologie Marine de Concarneau, Direction générale déléguée à la Recherche, à l’Expertise, à la Valorisation et à l’Enseignement-Formation (DGD.REVE), Muséum national d'Histoire naturelle (MNHN)-Muséum national d'Histoire naturelle (MNHN), Muséum national d'Histoire naturelle (MNHN), Auteur indépendant, MARine Biodiversity Exploitation and Conservation (UMR MARBEC), Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM), Stazione Zoologica Anton Dohrn (SZN), and Institut de l'Océan, Sorbonne Université
Subjects: [SDE]Environmental Sciences, Imagerie Hyperspectrale sous marine, Récifs artificiels
Abstract: Poster illustrant l'usage de l'imagerie hyperspectral sous marine pour évaluerl'efficacité des récifs artificiels à imiter le signal photosynthétique des assemblages des habitats naturels adjacents. Etude de cas effectué en Principauté de Monaco en 2020.
Published: 2023
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2. A species-level trait dataset of bats in Europe and beyond

Author: Jérémy S. P. Froidevaux, Nia Toshkova, Luc Barbaro, Ana Benítez-López, Christian Kerbiriou, Isabelle Le Viol, Michela Pacifici, Luca Santini, Clare Stawski, Danilo Russo, Jasja Dekker, Antton Alberdi, Francisco Amorim, Leonardo Ancillotto, Kévin Barré, Yves Bas, Lisette Cantú-Salazar, Dina K. N. Dechmann, Tiphaine Devaux, Katrine Eldegard, Sasan Fereidouni, Joanna Furmankiewicz, Daniela Hamidovic, Davina L. Hill, Carlos Ibáñez, Jean-François Julien, Javier Juste, Peter Kaňuch, Carmi Korine, Alexis Laforge, Gaëlle Legras, Camille Leroux, Grzegorz Lesiński, Léa Mariton, Julie Marmet, Vanessa A. Mata, Clare M. Mifsud, Victoria Nistreanu, Roberto Novella-Fernandez, Hugo Rebelo, Niamh Roche, Charlotte Roemer, Ireneusz Ruczyński, Rune Sørås, Marcel Uhrin, Adriana Vella, Christian C. Voigt, Orly Razgour, University of Stirling, Centre d'Ecologie et des Sciences de la COnservation (CESCO), Muséum national d'Histoire naturelle (MNHN)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), University of Bristol [Bristol], National Museum of Natural History, Sofia, Bulgaria (NMNHS), Bulgarian Academy of Sciences (BAS), Dynamiques et écologie des paysages agriforestiers (DYNAFOR), École nationale supérieure agronomique de Toulouse (ENSAT), Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Estación Biológica de Doñana (EBD), Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), Universidad de Granada = University of Granada (UGR), Dipartimento INFOCOM [Roma], Università degli Studi di Roma 'La Sapienza' = Sapienza University [Rome] (UNIROMA), Norwegian University of Science and Technology (NTNU), University of the Sunshine Coast (USC), University of Naples Federico II = Università degli studi di Napoli Federico II, Auteur indépendant, IT University of Copenhagen (ITU), Centro de Investigação em Biodiversidade e Recursos Genéticos [Vairao] (CIBIO), Universidade do Porto = University of Porto, Centre d’Ecologie Fonctionnelle et Evolutive (CEFE), Université Paul-Valéry - Montpellier 3 (UPVM)-École Pratique des Hautes Études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud])-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut Agro Montpellier, Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Université de Montpellier (UM), Luxembourg Institute of Science and Technology (LIST), Max Planck Institute of Animal Behavior, University of Konstanz, Office français de la biodiversité (OFB), Norwegian University of Life Sciences (NMBU), University of Veterinary Medicine [Vienna] (Vetmeduni), University of Wrocław [Poland] (UWr), Croatian Biospeleological Society, University of Glasgow, CIBER de Epidemiología y Salud Pública (CIBERESP), Ecosystèmes Insulaires Océaniens (UMR 241) (EIO), Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de la Polynésie Française (UPF)-Institut Louis Malardé [Papeete] (ILM), Institut de Recherche pour le Développement (IRD), Station de Biologie Marine de Concarneau, Direction générale déléguée à la Recherche, à l’Expertise, à la Valorisation et à l’Enseignement-Formation (DGD.REVE), Muséum national d'Histoire naturelle (MNHN)-Muséum national d'Histoire naturelle (MNHN), University of Southampton, School of Biological Sciences, University of P. J. Safarik in Kosice, University of Malta [Malta], Leibniz Institute for Zoo and Wildlife Research (IZW), Leibniz Association, University of Exeter, and Jeremy Froidevaux was funded by the Région Bretagne (SAD grant number 19041) and the Leverhulme Trust (grant number: ECF-2020-571). Nia Toshkova was funded by the Bulgarian National Science Fund (CP-06-COST/15from 16.12.2020) and а PhD Fellowship from Karoll Knowledge Foundation.
Subjects: Statistics and Probability, [SDV]Life Sciences [q-bio], ddc:570, Library and Information Sciences, Statistics, Probability and Uncertainty, Computer Science Applications, Education, Information Systems
Abstract: Knowledge of species’ functional traits is essential for understanding biodiversity patterns, predicting the impacts of global environmental changes, and assessing the efficiency of conservation measures. Bats are major components of mammalian diversity and occupy a variety of ecological niches and geographic distributions. However, an extensive compilation of their functional traits and ecological attributes is still missing. Here we present EuroBaTrait 1.0, the most comprehensive and up-to-date trait dataset covering 47 European bat species. The dataset includes data on 118 traits including genetic composition, physiology, morphology, acoustic signature, climatic associations, foraging habitat, roost type, diet, spatial behaviour, life history, pathogens, phenology, and distribution. We compiled the bat trait data obtained from three main sources: (i) a systematic literature and dataset search, (ii) unpublished data from European bat experts, and (iii) observations from large-scale monitoring programs. EuroBaTrait is designed to provide an important data source for comparative and trait-based analyses at the species or community level. The dataset also exposes knowledge gaps in species, geographic and trait coverage, highlighting priorities for future data collection.
Published: 2023

3. Actes du séminaire : Les habitats rocheux intertidaux et subtidaux des façades Manche - Mer du Nord - Atlantique

Author: Capietto, Anna, Derrien-Courtel, Sandrine, Beauvais, Sophie, de Bettignies, Thibaut, delavenne, Juliette, Marzin, Anahita, Pibot, Alain, Office français de la biodiversité (OFB), Station de Biologie Marine de Concarneau, Direction générale déléguée à la Recherche, à l’Expertise, à la Valorisation et à l’Enseignement-Formation (DGD.REVE), Muséum national d'Histoire naturelle (MNHN)-Muséum national d'Histoire naturelle (MNHN), Patrimoine naturel (PatriNat), Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Office français de la biodiversité (OFB), Laboratoire Ecologie Fonctionnelle et Environnement (LEFE), Institut Ecologie et Environnement (INEE), Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), and Université de Toulouse (UT)
Subjects: [SDV.EE.ECO]Life Sciences [q-bio]/Ecology, environment/Ecosystems, [SDE.BE]Environmental Sciences/Biodiversity and Ecology, [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography
Published: 2023

4. Upstream/downstream food quality differences in a Caribbean Island River

Author: Etienne Bezault, Alexandre Bec, Lou Frotté, Cédric Hubas, Sébastien Cordonnier, Fanny Perrière, Dominique Monti, Laboratoire Microorganismes : Génome et Environnement (LMGE), Centre National de la Recherche Scientifique (CNRS)-Université Clermont Auvergne (UCA), Biologie des Organismes et Ecosystèmes Aquatiques (BOREA), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA), Université des Antilles (Pôle Guadeloupe), Université des Antilles (UA), Station de Biologie Marine de Concarneau, Direction générale déléguée à la Recherche, à l’Expertise, à la Valorisation et à l’Enseignement-Formation (DGD.REVE), Muséum national d'Histoire naturelle (MNHN)-Muséum national d'Histoire naturelle (MNHN), Muséum national d'Histoire naturelle (MNHN), Institut de Systématique, Evolution, Biodiversité (ISYEB ), Muséum national d'Histoire naturelle (MNHN)-École Pratique des Hautes Études (EPHE), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA)
Subjects: 0106 biological sciences, Limiting factor, Aquatic Science, 01 natural sciences, 03 medical and health sciences, Organic matter, Ecosystem, 14. Life underwater, ComputingMilieux_MISCELLANEOUS, health care economics and organizations, Ecology, Evolution, Behavior and Systematics, 030304 developmental biology, Upstream (petroleum industry), chemistry.chemical_classification, 0303 health sciences, Fish migration, Caribbean island, Ecology, 010604 marine biology & hydrobiology, Shrimp, chemistry, 13. Climate action, Environmental science, lipids (amino acids, peptides, and proteins), [SDE.BE]Environmental Sciences/Biodiversity and Ecology, Food quality
Abstract: International audience; Caribbean rivers are inhabited by native macrofauna with a diadromous life cycle. The factors influencing the upstream migration of diadromous species are not well understood. Suggested primary factors include species density, habitat suitability and food availability. We hypothesized that food quality could be a key parameter in the upstream migration of macrocrustaceans. We sampled the main shrimp species and their potential food sources along an altitudinal gradient in the Grand Carbet River of Guadeloupe. Lipid analyses of the different food items reveal that biofilm and drifting organic matter are main sources of eicosapentaenoic acid (EPA). Biofilm is richer in EPA upstream, while drifting material is richer in EPA downstream. These opposed altitudinal gradients are reflected in shrimp lipids depending on whether they feed on biofilm or drifting organic matter. In addition, low EPA levels in shrimp suggest that dietary EPA could be a limiting factor in this system and that this differential altitudinal distribution of EPA could influence shrimp settlement.
Published: 2021

5. Over a decade of failure to implement <scp>UNEP</scp> / <scp>EUROBATS</scp> guidelines in wind energy planning: A call for action

Author: Kévin Barré, Jérémy S. P. Froidevaux, Camille Leroux, Léa Mariton, Marcus Fritze, Christian Kerbiriou, Isabelle Le Viol, Yves Bas, Charlotte Roemer, Centre d'Ecologie et des Sciences de la COnservation (CESCO), Muséum national d'Histoire naturelle (MNHN)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Station de Biologie Marine de Concarneau, Direction générale déléguée à la Recherche, à l’Expertise, à la Valorisation et à l’Enseignement-Formation (DGD.REVE), Muséum national d'Histoire naturelle (MNHN)-Muséum national d'Histoire naturelle (MNHN), University of Stirling, University of Bristol [Bristol], Institut de minéralogie, de physique des matériaux et de cosmochimie (IMPMC), Muséum national d'Histoire naturelle (MNHN)-Institut de recherche pour le développement [IRD] : UR206-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Centre d’Ecologie Fonctionnelle et Evolutive (CEFE), Université Paul-Valéry - Montpellier 3 (UPVM)-École Pratique des Hautes Études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud])-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut Agro Montpellier, and Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Université de Montpellier (UM)
Subjects: Global and Planetary Change, Ecology, [SDV]Life Sciences [q-bio], [SDE]Environmental Sciences, Environmental Science (miscellaneous), Nature and Landscape Conservation
Abstract: International audience; Wind power generation has grown exponentially over the past 20 years to meet international goals of increasing the share of renewables in energy production. Yet, this process has too often been conducted at the cost of airborne biodiversity such as birds and bats. The latter are severely threatened due to deaths by collision at wind turbine. The UNEP/EUROBATS agreement that came into
Published: 2022

6. Liza ramada Juveniles after Exposure to the Toxic Dinoflagellate Vulcanodinium rugosum: Effects on Fish Viability, Tissue Contamination and Microalgae Survival after Gut Passage

Author: Aurélien Bouquet, Marie Anaïs Perdrau, Mohamed Laabir, Elodie Foucault, Nicolas Chomérat, Jean Luc Rolland, Eric Abadie, MARine Biodiversity Exploitation and Conservation (UMR MARBEC), Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM), Station de Biologie Marine de Concarneau, Direction générale déléguée à la Recherche, à l’Expertise, à la Valorisation et à l’Enseignement-Formation (DGD.REVE), Muséum national d'Histoire naturelle (MNHN)-Muséum national d'Histoire naturelle (MNHN), and Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)
Subjects: Liza ramada, fish, portimines, contamination, food chain, Health, Toxicology and Mutagenesis, [SDE.MCG]Environmental Sciences/Global Changes, Vulcanodinium rugosum, [SDE.BE]Environmental Sciences/Biodiversity and Ecology, Toxicology, dissemination, pinnatoxins
Abstract: International audience; Pinnatoxins (PnTX) and Portimines (Prtn), two toxins produced by the benthic dinoflagellate Vulcanodinium rugosum, are known to be lethal to mice after intraperitoneal or oral administration. They are also known to accumulate in shellfish such as mussels and clams, but their effect on fish and the upper food chain remains unknown. In this work, juveniles of the fish Liza ramada (Mullet) were exposed to a strain of V. rugosum producing PnTX G and Prtn A. The fishes’ viability and contamination were recorded at times interval. Results showed that L. ramada juveniles were able to feed on V. rugosum and that their tissues could be contaminated by PnTX G and Prtn A without impact on fish viability. Furthermore, the microalgae temporary cysts survived and germinated after fish gut passage. This study showed the potential of L. ramada to transfer PnTX and Prtn toxins to the upper food chain and to disseminate V. rugosum in environment.
Published: 2022

7. Mangrove microbiota along the urban-to-rural gradient of the Cayenne estuary (French Guiana, South America): Drivers and potential bioindicators

Author: Guillaume Dirberg, Tony Robinet, Lars-Eric Heimbürger-Boavida, Ronan Jézéquel, Amonda El Houssainy, Maud Fiard, Romain Walcker, Cécile Militon, Cédric Hubas, Léa Sylvi, Isabelle Bihannic, Franck Gilbert, Philippe Cuny, Emma Michaud, Dominique Lamy, Institut méditerranéen d'océanologie (MIO), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), Biologie des Organismes et Ecosystèmes Aquatiques (BOREA), Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Sorbonne Université (SU)-Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU), Station de Biologie Marine de Concarneau, Direction générale déléguée à la Recherche, à l’Expertise, à la Valorisation et à l’Enseignement-Formation (DGD.REVE), Muséum national d'Histoire naturelle (MNHN)-Muséum national d'Histoire naturelle (MNHN), Centre de documentation de recherche et d'expérimentations sur les pollutions accidentelles des eaux (Cedre), Cedre, Institut d'écologie et des sciences de l'environnement de Paris (iEES Paris ), Institut de Recherche pour le Développement (IRD)-Sorbonne Université (SU)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Laboratoire Ecologie Fonctionnelle et Environnement (ECOLAB), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut Ecologie et Environnement (INEE), Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS), Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR), Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM), Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), ANR-10-LABX-0025,CEBA,CEnter of the study of Biodiversity in Amazonia(2010), Aix-Marseille Université - AMU (FRANCE), Centre de Documentation, de Recherche et d'Expérimentations sur les pollutions accidentelles des eaux - CEDRE (FRANCE), Centre National de la Recherche Scientifique - CNRS (FRANCE), Institut Français de Recherche pour l'Exploitation de la MER - IFREMER (FRANCE), Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE), Institut national de recherche pour l'agriculture, l'alimentation et l'environnement - INRAE (FRANCE), Institut de Recherche pour le Développement - IRD (FRANCE), Université Paris 1 Panthéon-Sorbonne (FRANCE), Sorbonne Université (FRANCE), Université de Bretagne Occidentale - UBO (FRANCE), Université Paris Est Créteil Val de Marne - UPEC (FRANCE), Université Toulouse III - Paul Sabatier - UT3 (FRANCE), Université de Caen Basse-Normandie (FRANCE), Museum National d'Histoire Naturelle - MNHN (FRANCE), Université de Toulon - UTLN (FRANCE), Université des Antilles et de la Guyane (FRANCE), Université de Paris - U-Paris (FRANCE), Institut d'Ecologie et des Sciences de l'Environnement de Paris - IEES (Paris, France), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA), Muséum national d'Histoire naturelle (MNHN), Institut de Recherche pour le Développement (IRD)-Sorbonne Université (SU)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Laboratoire Ecologie Fonctionnelle et Environnement (LEFE), Institut Ecologie et Environnement (INEE), Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT), Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées, and Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP)
Subjects: Geologic Sediments, Environmental Engineering, [SDE.MCG]Environmental Sciences/Global Changes, Biodiversité et Ecologie, 03 medical and health sciences, Dieldrin, chemistry.chemical_compound, Estuarine mangrove sediments, PAHs contamination, Humans, Environmental Chemistry, Organic matter, 14. Life underwater, Waste Management and Disposal, 030304 developmental biology, chemistry.chemical_classification, Ecologie, Environnement, 0303 health sciences, geography, geography.geographical_feature_category, Environmental Biomarkers, biology, Planctomycetes, 030306 microbiology, Ecology, Anthropogenic Effects, Microbiota, Organochlorine contaminants, Estuary, 15. Life on land, biology.organism_classification, [SDE.ES]Environmental Sciences/Environmental and Society, Pollution, 6. Clean water, French Guiana, chemistry, 13. Climate action, Wetlands, Low organic matter enrichment, Desulfobacteraceae, Environmental science, Proteobacteria, Mangrove, [SDE.BE]Environmental Sciences/Biodiversity and Ecology, Estuaries, Bioindicator, Acidobacteria
Abstract: International audience; The microbial communities inhabiting the Atlantic-East Pacific (AEP) mangroves have been poorly studied, and mostly comprise chronically polluted mangroves. In this study, we characterized changes in the structure and diversity of microbial communities of mangroves along the urban-to-rural gradient of the Cayenne estuary (French Guiana, South America) that experience low human impact. The microbial communities were assigned into 50 phyla. Proteobacteria, Chloroflexi, Acidobacteria, Bacteroidetes, and Planctomycetes were the most abundant taxa. The environmental determinants found to significantly correlated to the microbial communities at these mangroves were granulometry, dieldrin concentration, pH, and total carbon (TC) content. Furthermore, a precise analysis of the sediment highlights the existence of three types of anthropogenic pressure among the stations: (i) organic matter (OM) enrichment due to the proximity to the city and its wastewater treatment plant, (ii) dieldrin contamination, and (iii) naphthalene contamination. These forms of weak anthropogenic pressure seemed to impact the bacterial population size and microbial assemblages. A decrease in Bathyarchaeota, “Candidatus Nitrosopumilus”, and Nitrospira genera was observed in mangroves subjected to OM enrichment. Mangroves polluted with organic contaminants were enriched in Desulfobacteraceae, Desulfarculaceae, and Acanthopleuribacteraceae (with dieldrin or polychlorobiphenyl contamination), and Chitinophagaceae and Geobacteraceae (with naphthalene contamination). These findings provide insights into the main environmental factors shaping microbial communities of mangroves in the AEP that experience low human impact and allow for the identification of several potential microbial bioindicators of weak anthropogenic pressure.
Published: 2022

8. Spatial gradients of introgressed ancestry reveal cryptic connectivity patterns in a high gene flow marine fish

Author: Valérie Roussel, Karine Cheze, Pierre-Alexandre Gagnaire, Tony Robinet, Biologie des Organismes et Ecosystèmes Aquatiques (BOREA), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA), Station de Biologie Marine de Concarneau, Direction générale déléguée à la Recherche, à l’Expertise, à la Valorisation et à l’Enseignement-Formation (DGD.REVE), Muséum national d'Histoire naturelle (MNHN)-Muséum national d'Histoire naturelle (MNHN), Institut de Géoarchitecture, Université de Bretagne Sud (UBS)-Université de Brest (UBO)-Institut Brestois des Sciences de l'Homme et de la Société (IBSHS), Université de Brest (UBO)-Université de Brest (UBO), Institut des Sciences de l'Evolution de Montpellier (UMR ISEM), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-École Pratique des Hautes Études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Montpellier (UM)-Institut de recherche pour le développement [IRD] : UR226-Centre National de la Recherche Scientifique (CNRS), FFP: France Filière PêcheMNHN: Muséum National d'Histoire Naturelle, Institut Brestois des Sciences de l'Homme et de la Société (IBSHS), Université de Brest (UBO)-Université de Brest (UBO)-Université de Brest (UBO)-Université de Bretagne Sud (UBS), and Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-École pratique des hautes études (EPHE)
Subjects: Gene Flow, 0106 biological sciences, 0301 basic medicine, Mediterranean climate, Species distribution, Introgression, Biology, 010603 evolutionary biology, 01 natural sciences, Gene flow, 03 medical and health sciences, Mediterranean sea, Mediterranean Sea, Genetics, Animals, 14. Life underwater, Sea bass, Ecology, Evolution, Behavior and Systematics, [SDV.EE]Life Sciences [q-bio]/Ecology, environment, Portugal, Ecology, Genetic Variation, Genetics, Population, 030104 developmental biology, Genetic structure, Biological dispersal, North Sea
Abstract: International audience; Assessing genetic connectivity among populations in high gene flow species is sometimes insufficient to evaluate demographic connectivity. Genetic differentiation quickly becomes zero as soon as a few dozen migrants are exchanged per generation. This provides little information to determine whether migration can ensure demographic coupling. The resulting difficulties in delineating conservation units for the management of commercially exploited marine fish species are well illustrated in the case of the European sea bass (Dicentrarchus labrax). Previous attempts to assess connectivity patterns in the northeast Atlantic have been hampered by a lack of spatial genetic structure. In contrast, mark-recapture data suggested low migration rates between regional spawning areas. Here, we show how a spatial gradient of introgressed Mediterranean ancestry across the northeast Atlantic reflects cryptic patterns of genetic and demographic connectivity. Using a 1K SNP chip dataset in 827 individuals sampled from Portugal to the North Sea, we found null overall genetic differentiation across the northeast Atlantic. We however detected a subtle latitudinal admixture gradient originating at the edge of the contact zone with the Mediterranean sea bass lineage. Two significant breaks in the ancestry gradient at the tip of Galicia and northern Brittany indicated barriers to effective dispersal between demographically distinct units. Moreover, a northward expansion signal in Irish and North Seas was revealed by the surfing of rare Mediterranean alleles at the edge of the species range. Our results show that introgressed ancestry gradients offer a powerful alternative to assess genetic and demographic connectivity when the neutral migration-drift balance is not informative.
Published: 2020

9. Functional kleptoplasts intermediate incorporation of carbon and nitrogen in cells of the Sacoglossa sea slug Elysia viridis

Author: Cédric Hubas, Michael Kühl, Stéphane Escrig, Sónia Cruz, Sofie L. Jakobsen, Bruno Jesus, Najet Thiney, Anders Meibom, Paulo Cartaxana, Ricardo Calado, Charlotte LeKieffre, Centre for Environmental and Marine Studies [Aveiro] (CESAM), Universidade de Aveiro, Laboratoire de Planétologie et Géodynamique - Angers (LPG-ANGERS), Laboratoire de Planétologie et Géodynamique [UMR 6112] (LPG), Université d'Angers (UA)-Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), Université de Nantes (UN)-Université de Nantes (UN)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université d'Angers (UA)-Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), Université de Nantes (UN)-Université de Nantes (UN)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Biologie des Organismes et Ecosystèmes Aquatiques (BOREA), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA), Station de Biologie Marine de Concarneau, Direction générale déléguée à la Recherche, à l’Expertise, à la Valorisation et à l’Enseignement-Formation (DGD.REVE), Muséum national d'Histoire naturelle (MNHN)-Muséum national d'Histoire naturelle (MNHN), University of Copenhagen = Københavns Universitet (KU), Ecole Polytechnique Fédérale de Lausanne (EPFL), Mer, molécules et santé EA 2160 (MMS), Le Mans Université (UM)-Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), Université de Nantes (UN)-Université de Nantes (UN)-Université de Nantes - UFR des Sciences Pharmaceutiques et Biologiques, Université de Nantes (UN)-Université de Nantes (UN), FEDER, through COMPETE2020 - Programa Operacional Competitividade e InternacionalizacAo (POCI), Programa Operacional Regional (POR) de Lisboa national funds (OE), through FCT/MCTES PTDC/BIA-ANM/4622/2014POCI-01-0145-FEDER-016754CESAM through national funds (OE) via FCT/MCTES UIDB/50017/2020+UIDP/50017/2020Sapere-Aude advanced grant from the Independent Research Fund Denmark DFF-8021-00308BFCT/MCTES through Programa Investigador IF/00899/2014Portuguese Foundation for Science and TechnologyEuropean Commission, Muséum national d'Histoire naturelle (MNHN), University of Copenhagen = Københavns Universitet (UCPH), Institut Des Substances et Organismes de la Mer - UR 2160 (ISOMER), Nantes Université - UFR des Sciences Pharmaceutiques et Biologiques (Nantes Univ - UFR Pharmacie), Nantes Université - pôle Santé, Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ)-Nantes Université - pôle Santé, Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ)-Nantes université - UFR des Sciences et des Techniques (Nantes univ - UFR ST), Nantes Université - pôle Sciences et technologie, Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ)-Nantes Université - pôle Sciences et technologie, and Nantes Université (Nantes Univ)
Subjects: 0106 biological sciences, 0301 basic medicine, CODIUM-FRAGILE, Physiology, lcsh:Medicine, 01 natural sciences, CHLOROPLASTS, lcsh:Science, [SDV.EE]Life Sciences [q-bio]/Ecology, environment, Multidisciplinary, Ecology, opisthobranchia, [SDV.BA]Life Sciences [q-bio]/Animal biology, Fatty Acids, ASSOCIATION, Chloroplast, Biochemistry, chloroplasts, FATTY-ACIDS, Kleptoplasty, Elysia viridis, Nitrogen, [SDV.BC]Life Sciences [q-bio]/Cellular Biology, METABOLISM, Biology, Photosynthesis, 010603 evolutionary biology, GASTROPODA, Article, 03 medical and health sciences, Animals, codium-fragile, [CHIM]Chemical Sciences, [SDV.BV]Life Sciences [q-bio]/Vegetal Biology, BIOSYNTHESIS, OPISTHOBRANCHIA, photosynthesis, Sacoglossa, PHOTOSYNTHESIS, lcsh:R, association, ORGANELLES, Assimilation (biology), Marine invertebrates, fatty-acids, biology.organism_classification, Carbon, Sea slug, 030104 developmental biology, organelles, gastropoda, lcsh:Q, biosynthesis, Plant sciences, Zoology, metabolism
Abstract: Some sacoglossan sea slugs incorporate intracellular functional algal chloroplasts, a process termed kleptoplasty. “Stolen” chloroplasts (kleptoplasts) can remain photosynthetically active up to several months, contributing to animal nutrition. Whether this contribution occurs by means of translocation of photosynthesis-derived metabolites from functional kleptoplasts to the animal host or by simple digestion of such organelles remains controversial. Imaging of 13C and 15N assimilation over a 12-h incubation period of Elysia viridis sea slugs showed a light-dependent incorporation of carbon and nitrogen, observed first in digestive tubules and followed by a rapid accumulation into chloroplast-free organs. Furthermore, this work revealed the presence of 13C-labeled long-chain fatty acids (FA) typical of marine invertebrates, such as arachidonic (20:4n-6) and adrenic (22:4n-6) acids. The time frame and level of 13C- and 15N-labeling in chloroplast-free organs indicate that photosynthesis-derived primary metabolites were made available to the host through functional kleptoplasts. The presence of specific 13C-labeled long-chain FA, absent from E. viridis algal food, indicates animal based-elongation using kleptoplast-derived FA precursors. Finally, carbon and nitrogen were incorporated in organs and tissues involved in reproductive functions (albumin gland and gonadal follicles), implying a putative role of kleptoplast photosynthesis in the reproductive fitness of the animal host.
Published: 2020

10. An integrated investigation of the effects of ocean acidification on adult abalone (Haliotis tuberculata)

Author: Arianna Servili, Manon Coheleach, Aïcha Badou, Stéphanie Auzoux-Bordenave, Sophie G. Martin, Sabine Roussel, Nicolas Richard, Philippe Dubois, Sarah Di Giglio, Fanny Gaillard, Sylvain Huchette, Loïc Malet, Solène Avignon, Biologie des Organismes et Ecosystèmes Aquatiques (BOREA), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA), Adaptation et diversité en milieu marin (ADMM), Institut national des sciences de l'Univers (INSU - CNRS)-Station biologique de Roscoff (SBR), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Biologie Marine (LBM), Université libre de Bruxelles (ULB), Station de Biologie Marine de Concarneau, Direction générale déléguée à la Recherche, à l’Expertise, à la Valorisation et à l’Enseignement-Formation (DGD.REVE), Muséum national d'Histoire naturelle (MNHN)-Muséum national d'Histoire naturelle (MNHN), Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR), Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM), Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER), Scea France Haliotis, This work was supported in part by the ATM program 'Abalone shell mineralization' of the MNHN funded by theMinistère délégué à l’Enseignement Supérieur et à la Recherche (Paris, France), the program 'Acidification des Océans' (ICOBio project) funded by the Fondation pour la Recherche sur la Biodiversité (FRB) and the Ministère de la Transition Ecologique et Solidaire (MTES), and the French LabexMER program (OASYS project). SA was sup‐ported by a post-doctoral fellowship from the MNHN funded by the Ministère de la Transition Ecologique et Solidaire (MTES). SDG is holder of a FRIA PhD fellowship from the National Fund for Scientific Research (NFSR, Belgium) and PhD is a Research Director of the NFSR. The Regional Council of Brittany, the General Council of Finistère, the urban community of Concarneau Cornouaille Agglomération, and the European Regional Development Fund (ERDF) are acknowledged for the funding of the scanning electron microscope (Sigma 300 FE-SEM) at the Concarneau Marine Station., ANR-10-LABX-0019,LabexMER,LabexMER Marine Excellence Research: a changing ocean(2010), Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Sorbonne Université (SU)-Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU), Adaptation et diversité en milieu marin (AD2M), Station biologique de Roscoff (SBR), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Institut Universitaire Européen de la Mer (IUEM), Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Centre National de la Recherche Scientifique (CNRS)-Université de Brest (UBO), Institut Français de Recherche pour l'Exploitation de la Mer - Brest (IFREMER Centre de Bretagne), and Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)
Subjects: 0106 biological sciences, food.ingredient, Abalone, acl, growth, ocean acidification, shell microstructure, mechanical properties, Aquatic Science, Oceanography, 010603 evolutionary biology, 01 natural sciences, calcification, chemistry.chemical_compound, food, Aquaculture, Hemolymph, 14. Life underwater, Food science, Haliotis, Océanographie biologique, [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography, Ecology, Evolution, Behavior and Systematics, [SDU.OCEAN]Sciences of the Universe [physics]/Ocean, Atmosphere, abalone, Ecology, business.industry, Chemistry, 010604 marine biology & hydrobiology, Ocean acidification, Metabolism, Calcium carbonate, [SDE]Environmental Sciences, physiology, gene expression, Seawater, [SDV.EE.BIO]Life Sciences [q-bio]/Ecology, environment/Bioclimatology, [SDE.BE]Environmental Sciences/Biodiversity and Ecology, business
Abstract: Ocean acidification (OA) and its subsequent changes in seawater carbonate chemistry are threatening the survival of calcifying organisms. Due to their use of calcium carbonate to build their shells, marine molluscs being particularly vulnerable. This study investigated the effect of CO2-induced OA on adult European abalone (Haliotis tuberculata) using a multi- parameter approach. Biological (survival, growth), physiological (pHT of haemolymph, phagocytosis, metabolism, gene expression) and structural responses (shell strength, nanoindentation measurements, SEM imaging of microstructure) were evaluated throughout a 5-month exposure to ambient (8.0) and low (7.7) pH conditions. During the first two months, the haemolymph pH was reduced, indicating that abalone do not compensate for the pH decrease of their internal fluid. Overall metabolism and immune status were not affected, suggesting that abalone maintain their vital functions when facing OA. However, after four months of exposure, adverse effects on shell growth, calcification, microstructure and resistance were highlighted, whereas the haemolymph pH was compensated. Significant reduction in shell mechanical properties were revealed at pH 7.7, suggesting that OA altered the biomineral architecture leading to a more fragile shell. It is concluded that under lower pH, abalone metabolism is maintained at a cost to growth and shell integrity. This may impact both abalone ecology and aquaculture., info:eu-repo/semantics/inPress
Published: 2020

11. Fiches,descriptives des habitats marins benthiques de la Manche, de la Mer du Nord et de l’Atlantique

Author: La Rivière, Marie, delavenne, Juliette, Janson, A.-L., Andres, Salomé, de Bettignies, Thibaut, Blanchet, Hugues, Decaris, François-Xavier, Derrien, René, Derrien-Courtel, Sandrine, Grall, Jacques, Houbin, Céline, Latry, Lise, Le Gal, Aodren, Lutrand, Aurélie, Menot, Lenaick, Percevault, Louise, Tauran, Adeline, Thiébaut, Éric, Patrimoine naturel (PatriNat), Muséum national d'Histoire naturelle (MNHN)-Centre National de la Recherche Scientifique (CNRS)-Office français de la biodiversité (OFB), Laboratoire Ecologie Fonctionnelle et Environnement (LEFE), Institut Ecologie et Environnement (INEE), Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT), Environnements et Paléoenvironnements OCéaniques (EPOC), Observatoire aquitain des sciences de l'univers (OASU), Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-École Pratique des Hautes Études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Station de Biologie Marine de Concarneau, Direction générale déléguée à la Recherche, à l’Expertise, à la Valorisation et à l’Enseignement-Formation (DGD.REVE), Muséum national d'Histoire naturelle (MNHN)-Muséum national d'Histoire naturelle (MNHN), Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR), Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM), Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Fédération de recherche de Roscoff (FR2424), Station biologique de Roscoff (SBR), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER), Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Office français de la biodiversité (OFB), Institut Universitaire Européen de la Mer (IUEM), Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS), and Patrinat (OFB-MNHN-CNRS)
Subjects: [SDV.EE]Life Sciences [q-bio]/Ecology, environment, [SDE]Environmental Sciences
Published: 2022

12. Climate change influences chlorophylls and bacteriochlorophylls metabolism in hypersaline microbial mat

Author: M.A. Perdrau, Cédric Hubas, C. Mazière, M. Bodo, Christine Dupuy, Robert Duran, Cristiana Cravo-Laureau, LIttoral ENvironnement et Sociétés - UMRi 7266 (LIENSs), Université de La Rochelle (ULR)-Centre National de la Recherche Scientifique (CNRS), Institut des sciences analytiques et de physico-chimie pour l'environnement et les materiaux (IPREM), Université de Pau et des Pays de l'Adour (UPPA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Muséum national d'Histoire naturelle (MNHN), Biologie des Organismes et Ecosystèmes Aquatiques (BOREA), Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Sorbonne Université (SU)-Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU), Station de Biologie Marine de Concarneau, Direction générale déléguée à la Recherche, à l’Expertise, à la Valorisation et à l’Enseignement-Formation (DGD.REVE), Muséum national d'Histoire naturelle (MNHN)-Muséum national d'Histoire naturelle (MNHN), LIttoral ENvironnement et Sociétés (LIENSs), La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS), Université de Caen Normandie (UNICAEN), and Normandie Université (NU)-Normandie Université (NU)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA)
Subjects: 0106 biological sciences, Chlorophyll, Chlorophyll a, Environmental Engineering, Climate Change, [SDE.MCG]Environmental Sciences/Global Changes, Chlorosome, 01 natural sciences, Hypersaline microbial mats, 03 medical and health sciences, chemistry.chemical_compound, Phototrophic communities, Environmental Chemistry, Humans, Seawater, Microbial mat, Waste Management and Disposal, Bacteriochlorophylls, 030304 developmental biology, 0303 health sciences, Phototroph, Chlorophyll derivatives, 010604 marine biology & hydrobiology, Chlorophyll A, Ocean acidification, Hydrogen-Ion Concentration, Pollution, Anoxygenic photosynthesis, Mesocosms, chemistry, 13. Climate action, Environmental chemistry, [SDE]Environmental Sciences, Bacteriochlorophyll, [SDE.BE]Environmental Sciences/Biodiversity and Ecology
Abstract: International audience; This study aimed to determine the effect of the climatic change on the phototrophic communities of hypersaline microbial mats. Ocean acidification and warming were simulated alone and together on microbial mats placed into mesocosms. As expected, the temperature in the warming treatments increased by 4 °C from the initial temperature. Surprisingly, no significance difference was observed between the water pH of the different treatments despite of a decrease of 0.4 unit pH in the water reserves of acidification treatments. The salinity increased on the warming treatments and the dissolved oxygen concentration increased and was higher on the acidification treatments. A total of 37 pigments were identified belonging to chlorophylls, carotenes and xanthophylls families. The higher abundance of unknown chlorophyll molecules called chlorophyll derivatives was observed in the acidification alone treatment with a decrease in chlorophyll a abundance. This change in pigmentary composition was accompanied by a higher production of bound extracellular carbohydrates but didn't affect the photosynthetic efficiency of the microbial mats. A careful analysis of the absorption properties of these molecules indicated that these chlorophyll derivatives were likely bacteriochlorophyll c contained in the chlorosomes of green anoxygenic phototroph bacteria. Two hypotheses can be drawn from these results: 1/ the phototrophic communities of the microbial mats were modified under acidification treatment leading to a higher relative abundance of green anoxygenic bacteria, or 2/ the highest availability of CO2 in the environment has led to a shift in the metabolism of green anoxygenic bacteria being more competitive than other phototrophs.
Published: 2022

13. An Overview of Marine Non-Indigenous Species Found in Three Contrasting Biogeographic Metropolitan French Regions: Insights on Distribution, Origins and Pathways of Introduction

Author: Cécile Massé, Frédérique Viard, Suzie Humbert, Elvire Antajan, Isabelle Auby, Guy Bachelet, Guillaume Bernard, Vincent M. P. Bouchet, Thomas Burel, Jean-Claude Dauvin, Alice Delegrange, Sandrine Derrien-Courtel, Gabin Droual, Benoit Gouillieux, Philippe Goulletquer, Laurent Guérin, Anne-Laure Janson, Jérôme Jourde, Céline Labrune, Nicolas Lavesque, Jean-Charles Leclerc, Michel Le Duff, Vincent Le Garrec, Pierre Noël, Antoine Nowaczyk, Christine Pergent-Martini, Jean-Philippe Pezy, Aurore Raoux, Virginie Raybaud, Sandrine Ruitton, Pierre-Guy Sauriau, Nicolas Spilmont, Delphine Thibault, Dorothée Vincent, Amelia Curd, Patrimoine naturel (PatriNat), Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Office français de la biodiversité (OFB), Institut des Sciences de l'Evolution de Montpellier (UMR ISEM), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-École Pratique des Hautes Études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut de recherche pour le développement [IRD] : UR226-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM), LITTORAL (LITTORAL), Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER), Environnements et Paléoenvironnements OCéaniques (EPOC), Observatoire aquitain des sciences de l'univers (OASU), Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-École Pratique des Hautes Études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 (LOG), Institut national des sciences de l'Univers (INSU - CNRS)-Université du Littoral Côte d'Opale (ULCO)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Nord]), Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR), Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM), Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Station de Biologie Marine de Concarneau, Direction générale déléguée à la Recherche, à l’Expertise, à la Valorisation et à l’Enseignement-Formation (DGD.REVE), Muséum national d'Histoire naturelle (MNHN)-Muséum national d'Histoire naturelle (MNHN), Dynamiques des Écosystèmes Côtiers (DYNECO), Dynamique et durabilité des écosystèmes : de la source à l’océan (DECOD), Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), LIttoral ENvironnement et Sociétés (LIENSs), La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Ecogéochimie des environnements benthiques (LECOB), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Observatoire océanologique de Banyuls (OOB), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Institut méditerranéen d'océanologie (MIO), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), Station biologique de Roscoff (SBR), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Institut Universitaire Européen de la Mer (IUEM), Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS), Office français de la biodiversité (OFB), Morphodynamique Continentale et Côtière (M2C), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS), Fédération de recherche Environnement et Société (FRES 3041), Université Pascal Paoli (UPP), Ecology and Conservation Science for Sustainable Seas (ECOSEAS), and Centre National de la Recherche Scientifique (CNRS)-Université Côte d'Azur (UCA)
Subjects: Ecology, Ecological Modeling, biogeographic provinces, Agricultural and Biological Sciences (miscellaneous), baseline, inventory, aquaculture, maritime trade, [SDE]Environmental Sciences, species introductions, France, MSFD, [SDE.BE]Environmental Sciences/Biodiversity and Ecology, Nature and Landscape Conservation
Abstract: International audience; Biological invasions are one of the main global threats to biodiversity in terrestrial, freshwater and marine ecosystems worldwide, requiring effective inventorying and monitoring programs. Here, we present an updated list of non-indigenous species in French marine and transitional waters. Focused on eukaryote pluricellular species found throughout the three metropolitan French marine regions (Western Mediterranean Sea, Bay of Biscay and the Northern Seas), a total of 342 non-indigenous, including 42 cryptogenic, species are listed as having been introduced since the 13th century. The majority of the species originated from the temperate Northern Pacific. They mainly arrived through both ballast and hull fouling and also are associated with shellfish farming activities. Most of them have been introduced since the 1970s, a time when maritime and aquaculture trade intensified. Despite important human-aided opportunities for species transfer between the three marine regions (for instance, via recreational boating or aquaculture transfers), only a third of these NIS are common to all regions, as expected due to their environmental specificities.
Published: 2023

14. Morphology and phylogeny of Prorocentrum porosum sp. nov. (Dinophyceae): A new benthic toxic dinoflagellate from the Atlantic and Pacific Oceans

Author: Arteaga-Sogamoso, Edgar, Rodríguez, Francisco, Amato, Alberto, Ben-Gigirey, Begoña, Fraga, Santiago, Mafra, Luiz Laureno, Fernandes, Luciano Felício, de Azevedo Tibiriçá, Carlos Eduardo J, Chomérat, Nicolas, Nishimura, Tomohiro, Homma, Chiho, Adachi, Masao, Mancera-Pineda, José Ernesto, Instituto de Investigaciones Marinas y Costeras 'José Benito Vives de Andréis' (INVEMAR), Ministerio del Medio Ambiente, Colombie, Universidad Nacional de Colombia, sede Caribe, Centro Nacional Instituto Espanol de Oceanografia, Centro Oceanographico de Vigo (IEO-CSIC), European Union Reference Laboratory for Monitoring of Marine Biotoxins, Citexvi Campus Universitario de Vigo, LIPID, Physiologie cellulaire et végétale (LPCV), Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Grenoble Alpes (UGA)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Grenoble Alpes (UGA), Praza Mestra Manuela, Centro de Estudos do Mar, Universidade Federal do Parana, Departamento de Botânica, SCB, UFPR – Federal University of Parana, Curitiba, Brazil, Station de Biologie Marine de Concarneau, Direction générale déléguée à la Recherche, à l’Expertise, à la Valorisation et à l’Enseignement-Formation (DGD.REVE), Muséum national d'Histoire naturelle (MNHN)-Muséum national d'Histoire naturelle (MNHN), Cawthron Institute, Laboratory of Aquatic Environmental Science (LAQUES), Universidad Nacional de Colombia [Bogotà] (UNAL), Ministry of science, technology and innovation of Colombia - MINCIENCIAS (COLCIENCIAS), Universidad Nacional de Colombia-UNAL and CECIMAR (contribution number: 547, within the project 'Influencia de recursos y reguladores en la abundancia de dinoflagelados bentonicos del Caribe', Hermes Code: 40410), The Marine and Coastal Research Institute 'Jose Benito Vives de Andreis' (INVEMAR, contribution number: 1343) and Environmental and Sustainable Development Ministry-MINAMBIENTE through BPIN project, The International Atomic Energy Agency (IAEA) through the Research Contract RC#18827 ('Bentox Project') and the TechnicalCooperation projects RLA/7/014 and RLA/7/020, Project DIANAS (CTM2017-86066-R, MICINN), CCVIEO-10 (IEO, Spanish Institute ofOceanography), Axencia Galega de Innovacion (agreement GAIN-IEO), COLCIENCIAS grant (call No.727–2015), and Cross-ministerial Strategic Innovation Promotion Program, Grants from the Project of the NARO Bio-oriented Technology Research Advancement Institution (the special scheme project on vitalizing management entities of agriculture, forestry and fisheries), and Japan Society for the Promotion of Science (JSPS) Bilateral Joint Research Projects (JSPS-RSNZ Joint Research Project: JPJSBP120211002)
Subjects: LSU, Okadaic acid, [SDV]Life Sciences [q-bio], [SDE]Environmental Sciences, Prorocentrum porosum, Plant Science, ITS, Aquatic Science, [SDV.BID.SPT]Life Sciences [q-bio]/Biodiversity/Systematics, Phylogenetics and taxonomy, Phylogeny, Taxonomy
Abstract: International audience; A new marine benthic toxic Prorocentrum species is described from the tropical/subtropical regions of the Atlantic (Colombian Caribbean Sea and Northeast Brazil) and Pacific (Southern Japan) oceans. Morphological cell structures were examined using light (LM) and scanning electron (SEM) microscopy. Prorocentrum porosum sp. nov. was characterized by 35.9-50.2 μm long and 25.4-45.7 μm deep cells, covered by broadly ovoid symmetric thecal plates. The surface of both thecal plates is smooth and covered by randomly scattered kidney-shaped pores (n = 102-149), rounder towards the center, absent in the central part, and surrounded by a conspicuous marginal ring of about 69-92 evenly spaced pores. Broad V-shaped periflagellar area exhibiting flagellar and accessory pores. The molecular phylogenetic position of P. porosum sp. nov. was inferred using partial LSU rRNA gene (rDNA) and rDNA ITS sequences. This new species branched with high support in a Prorocentrum clade including P. caipirignum, P. hoffmannianum and P. cf. lima (P. lima morphotype 5 sensuZhang et al., 2015). Pairwise comparison of ITS1 and ITS2 transcripts with these closest relatives revealed the presence of compensatory base changes (CBCs), with the exception of P. cf. lima (P. lima morphotype 5), which only showed in ITS2 a hemi-CBC (HCBC) and two base changes that possibly induce a structural modification. Toxin analyses performed in two Colombian and Brazilian strains in the present study detected the presence of low amounts of okadaic acid.
Published: 2023

15. Combined effects of ocean warming and acidification on the larval stages of the European abalone Haliotis tuberculata

Author: Stéphanie Auzoux-Bordenave, Javid Kavousi, Sylvain Huchette, Carole Di Poi, Fanny Gaillard, Sabine Roussel, Philippe Dubois, Sophie G. Martin, Aïcha Badou, Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR), Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM), Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Adaptation et diversité en milieu marin (AD2M), Station biologique de Roscoff (SBR), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Direction générale déléguée à la Recherche, à l’Expertise, à la Valorisation et à l’Enseignement-Formation (DGD.REVE), Muséum national d'Histoire naturelle (MNHN), Station de Biologie Marine de Concarneau, Muséum national d'Histoire naturelle (MNHN)-Muséum national d'Histoire naturelle (MNHN), Scea France Haliotis, Laboratoire de Biologie Marine (LBM), Université libre de Bruxelles (ULB), Biologie des Organismes et Ecosystèmes Aquatiques (BOREA), Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Sorbonne Université (SU)-Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU), ANR-17-EURE-0015,ISBlue,Interdisciplinary Graduate School for the Blue planet(2017), Institut Universitaire Européen de la Mer (IUEM), and Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Centre National de la Recherche Scientifique (CNRS)-Université de Brest (UBO)
Subjects: 0106 biological sciences, food.ingredient, animal structures, Abalone, Oceans and Seas, Effects of global warming on oceans, [SDV]Life Sciences [q-bio], Gastropoda, Abalone larvae, [SDV.BID]Life Sciences [q-bio]/Biodiversity, Aquatic Science, Oceanography, 01 natural sciences, Persistence (computer science), food, Animal science, Aquaculture, Animals, Climate change, Seawater, 14. Life underwater, Haliotis, Marine mollusks, Larva, Chemistry, business.industry, 010604 marine biology & hydrobiology, Ocean acidification, Global warming, fungi, Temperature, 04 agricultural and veterinary sciences, Hydrogen-Ion Concentration, Pollution, 13. Climate action, 040102 fisheries, 0401 agriculture, forestry, and fisheries, business
Abstract: International audience; This study examined the physiological responses of the larval stages of Haliotis tuberculata, an economically important abalone, to combined temperature (17 °C and 19 °C) and pH (ambient pH and −0.3 units, i.e., +200% increase in seawater acidity) in a full factorial experiment. Tissue organogenesis, shell formation, and shell length significantly declined due to low pH. High temperature significantly increased the proportion of fully shelled larvae at 24 h post-fertilization (hpf), but increased the proportion of unshelled larvae at 72 hpf. Percentage of swimming larvae at 24 hpf, 72 hpf and 96 hpf significantly declined due to high temperature, but not because of low pH. Larval settlement increased under high temperature, but was not affected by low pH. Despite the fact that no interaction between temperature and pH was observed, the results provide additional evidence on the sensitivity of abalone larvae to both low pH and high temperature. This may have negative consequences for the persistence of abalone populations in natural and aquaculture environments in the near future.
Published: 2021

16. The response of microphytobenthos to physical disturbance, herbicide, and titanium dioxide nanoparticle exposure

Author: James E.V. Rimmer, Cédric Hubas, Adam J. Wyness, Bruno Jesus, Morgan Hartley, Andrew J. Blight, Antoine Prins, David M. Paterson, European Commission, John Templeton Foundation, NERC, University of St Andrews. School of Biology, University of St Andrews. Sediment Ecology Research Group, University of St Andrews. Scottish Oceans Institute, University of St Andrews. Coastal Resources Management Group, University of St Andrews. Marine Alliance for Science & Technology Scotland, University of St Andrews. St Andrews Sustainability Institute, University of Saint Andrews, Scottish Oceans Institute [University of St Andrews] (SOI), School of Biology [University of St Andrews], University of St Andrews [Scotland]-University of St Andrews [Scotland], Biologie des Organismes et Ecosystèmes Aquatiques (BOREA), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA), Station de Biologie Marine de Concarneau, Direction générale déléguée à la Recherche, à l’Expertise, à la Valorisation et à l’Enseignement-Formation (DGD.REVE), Muséum national d'Histoire naturelle (MNHN)-Muséum national d'Histoire naturelle (MNHN), Muséum national d'Histoire naturelle (MNHN), Scottish Association for Marine Science (SAMS), Nantes Université (Nantes Univ), Institut Des Substances et Organismes de la Mer - UR 2160 (ISOMER), Nantes Université - UFR des Sciences Pharmaceutiques et Biologiques (Nantes Univ - UFR Pharmacie), Nantes Université - pôle Santé, Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ)-Nantes Université - pôle Santé, Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ)-Nantes université - UFR des Sciences et des Techniques (Nantes univ - UFR ST), Nantes Université - pôle Sciences et technologie, Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ)-Nantes Université - pôle Sciences et technologie, and European Project: 227799,EC:FP7:INFRA,FP7-INFRASTRUCTURES-2008-1,ASSEMBLE(2009)
Subjects: Diatoms, MCC, Glyphosate, Herbicides, [SDE.MCG]Environmental Sciences/Global Changes, QH301 Biology, Microphytobenthos, NDAS, Aquatic Science, Oceanography, Pollution, QH301, Stressor, Biofilms, Titanium dioxide, Nanoparticles, [SDE.BE]Environmental Sciences/Biodiversity and Ecology
Abstract: Funding: The research leading to these results received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement No 730984, ASSEMBLE Plus project. AJW was funded by the John Templeton Grant 60501, “Putting the Extended Evolutionary Synthesis to the Test”. DMP and AJB were supported by the NERC Blue-coast award (NE/N016009/1). The microphytobenthos that form transient biofilms are important primary producers in intertidal, depositional habitats, yet we have only a limited understanding of how they respond to the cumulative impacts of the growing range of anthropogenic stressors to which they are exposed. We know even less about how the temporal alignment of exposure – such as duration and exposure sequence – may affect the response. Estuarine biofilms were cultured in mesocosms and exposed to the herbicide glyphosate and titanium dioxide (TiO2) nanoparticles in different sequences (glyphosate-first or TiO2-first), as well as in the presence and absence of physical disturbance. We found that at environmentally realistic chemical concentrations, the order of exposure was less important than the total stressor scenario in terms of impacts on key functional attributes and diatom community structure. Physical disturbance did not have an impact on functional attributes, regardless of exposure sequence. Publisher PDF
Published: 2022

17. Photosynthesis from stolen chloroplasts can support sea slug reproductive fitness

Author: Ricardo Calado, Charlotte LeKieffre, Gonçalo Calado, Rosário Domingues, Sónia Cruz, Bruno Jesus, Paulo Cartaxana, Felisa Rey, Stéphane Escrig, Diana Lopes, Anders Meibom, Michael Kühl, Jorge E. Spangenberg, Cédric Hubas, MARE - Centro de Ciências do Mar e do Ambiente, Universidade de Aveiro, Physiologie cellulaire et végétale (LPCV), Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Grenoble Alpes (UGA), Muséum national d'Histoire naturelle (MNHN), Biologie des Organismes et Ecosystèmes Aquatiques (BOREA), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA), Station de Biologie Marine de Concarneau, Direction générale déléguée à la Recherche, à l’Expertise, à la Valorisation et à l’Enseignement-Formation (DGD.REVE), Muséum national d'Histoire naturelle (MNHN)-Muséum national d'Histoire naturelle (MNHN), Université de Lausanne = University of Lausanne (UNIL), Ecole Polytechnique Fédérale de Lausanne (EPFL), Nantes Université (Nantes Univ), Lusófona University [Lisbon], Universidade Nova de Lisboa = NOVA University Lisbon (NOVA), and University of Copenhagen = Københavns Universitet (UCPH)
Subjects: 0106 biological sciences, Chloroplasts, Gastropoda, Opisthobranchia, elysia-viridis, 01 natural sciences, kleptoplast, fatty acid, reproduction, Sacoglossa, kleptoplast, Environmental Science(all), GONAD, Photosynthesis, Research Articles, General Environmental Science, 0303 health sciences, Agricultural and Biological Sciences(all), Ecology, opisthobranchia, acquisition, ASSOCIATION, General Medicine, kleptoplasts, Sacoglossa, Chloroplast, [SDE]Environmental Sciences, SURVIVAL, FATTY-ACIDS, General Agricultural and Biological Sciences, animal structures, ELYSIA-VIRIDIS, Elysia viridis, Biology, KLEPTOPLASTS, survival, gonad, 010603 evolutionary biology, General Biochemistry, Genetics and Molecular Biology, reproduction, 03 medical and health sciences, Immunology and Microbiology(all), Animals, 14. Life underwater, OPISTHOBRANCHIA, 030304 developmental biology, General Immunology and Microbiology, Reproductive success, ACQUISITION, Biochemistry, Genetics and Molecular Biology(all), Host (biology), fungi, association, fatty-acids, biology.organism_classification, Sea slug, Genetic Fitness, fatty acid
Abstract: Some sea slugs are able to steal functional chloroplasts (kleptoplasts) from their algal food sources, but the role and relevance of photosynthesis to the animal host remain controversial. While some researchers claim that kleptoplasts are slowly digestible ‘snacks’, others advocate that they enhance the overall fitness of sea slugs much more profoundly. Our analysis shows light-dependent incorporation of 13 C and 15 N in the albumen gland and gonadal follicles of the sea slug Elysia timida , representing translocation of photosynthates to kleptoplast-free reproductive organs. Long-chain polyunsaturated fatty acids with reported roles in reproduction were produced in the sea slug cells using labelled precursors translocated from the kleptoplasts. Finally, we report reduced fecundity of E. timida by limiting kleptoplast photosynthesis. The present study indicates that photosynthesis enhances the reproductive fitness of kleptoplast-bearing sea slugs, confirming the biological relevance of this remarkable association between a metazoan and an algal-derived organelle.
Published: 2021

18. Acid–base balance in the hæmolymph of European abalone (Haliotis tuberculata) exposed to CO2-induced ocean acidification

Author: Philippe Dubois, Sandra Chevret, Sophie Martin, Stéphanie Auzoux-Bordenave, Sarah Di Giglio, Aïcha Badou, Biologie des Organismes et Ecosystèmes Aquatiques (BOREA), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA), Adaptation et diversité en milieu marin (AD2M), Station biologique de Roscoff [Roscoff] (SBR), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Station de Biologie Marine de Concarneau, Direction générale déléguée à la Recherche, à l’Expertise, à la Valorisation et à l’Enseignement-Formation (DGD.REVE), Muséum national d'Histoire naturelle (MNHN)-Muséum national d'Histoire naturelle (MNHN), Station biologique de Roscoff (SBR), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Biologie Marine (LBM), Université libre de Bruxelles (ULB), Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Sorbonne Université (SU)-Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU), Adaptation et diversité en milieu marin (ADMM), Institut national des sciences de l'Univers (INSU - CNRS)-Station biologique de Roscoff (SBR), and Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)
Subjects: 0106 biological sciences, food.ingredient, Abalone, Physiology, Alkalinity, acid-base balance, ocean acidification, Acid–base homeostasis, 010603 evolutionary biology, 01 natural sciences, Biochemistry, food, Dissolved organic carbon, Hemolymph, haemolymph pH and alkalinity, pH SW: seawater pH (total scale), 14. Life underwater, Haliotis, pH HL : haemolymph pH (total scale), Molecular Biology, ComputingMilieux_MISCELLANEOUS, abalone, RCP 8.5: Representative Concentration Pathway 8.5, Chemistry, 010604 marine biology & hydrobiology, [SDV.BA]Life Sciences [q-bio]/Animal biology, Ocean acidification, buffer capacity pH on the Total scale, 13. Climate action, Environmental chemistry, [SDE]Environmental Sciences, Seawater
Abstract: International audience; Ocean acidification (OA) and the associated changes in seawater carbonate chemistry pose a threat to calcifying organisms. This is particularly serious for shelled molluscs, in which shell growth and microstructure has been shown to be highly sensitive to OA. To improve our understanding of the responses of abalone to OA, this study investigated the effects of CO 2-induced ocean acidification on extra-cellular acid-base parameters in the European abalone Haliotis tuberculata. Three-year-old adult abalone were exposed for 15 days to three different pH levels (7.9, 7.7, 7.4) representing current and predicted near-future conditions. Haemolymph pH and total alkalinity were measured at different time points during exposure and used to calculate the carbonate parameters of the extracellular fluid. Total protein content was also measured to determine whether seawater acidification influences the composition and buffer capacity of haemolymph. Extracellular pH was maintained at seawater pH 7.7 indicating that abalones are able to buffer moderate acidification (-0.2 pH units). This was not due to an accumulation of HCO 3-ions but rather to a high haemolymph protein concentration. By contrast, haemolymph pH was significantly decreased after 5 days of exposure to pH 7.4, indicating that abalone do not compensate for higher decreases in seawater pH. Total alkalinity and dissolved inorganic carbon were also significantly decreased after 15 days of low pH exposure. It is concluded that changes in the acid-base balance of the haemolymph might be involved in deleterious effects recorded in adult H. 2 tuberculata facing severe OA stress. This would impact both the ecology and aquaculture of this commercially important species.
Published: 2021

19. Adapting street lighting to limit light pollution’s impacts on bats

Author: Pauwels, Julie, Le Viol, Isabelle, Bas, Yves, Valet, Nicolas, Kerbiriou, Christian, Centre d'Ecologie et des Sciences de la COnservation (CESCO), Muséum national d'Histoire naturelle (MNHN)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Station de Biologie Marine de Concarneau, Direction générale déléguée à la Recherche, à l’Expertise, à la Valorisation et à l’Enseignement-Formation (DGD.REVE), Muséum national d'Histoire naturelle (MNHN)-Muséum national d'Histoire naturelle (MNHN), Centre d’Ecologie Fonctionnelle et Evolutive (CEFE), Université Paul-Valéry - Montpellier 3 (UPVM)-École Pratique des Hautes Études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud])-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut Agro - Montpellier SupAgro, Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), Université Paul-Valéry - Montpellier 3 (UPVM)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud])-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), and Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)
Subjects: [SDV.EE]Life Sciences [q-bio]/Ecology, environment, ALAN, Ecology, Chiroptera, Urbanization, Artificial light, Land-use planning, QH540-549.5, Protected areas
Abstract: Artificial light at night (ALAN) affects biodiversity conservation through its impacts on spatio-temporal distribution patterns of species, in particular bat species. The development of this threat underlines the urgency to adopt lighting practices (characteristics) that have the least impact on species, in particular the most vulnerable species still present in semi-natural areas. It is therefore crucial to better assess the relative effects of the different light parameters for a wide variety of species. Our study investigates the relative effects of streetlights characteristics, i.e. height, lamps type (HPS, LED), illuminance, and the distance to a streetlight on the activity of a variety of species (15) according to their flight traits. We compared bat species activity in lit and dark conditions along streets and in hedges at less than 200 m away from streetlights of various characteristics, in a Mediterranean protected area.Lighting had contrasting effects on the activity of clutter and aerial bat species, with a strong negative effect on clutter species (90% reduction of bat activity), half of which are strictly protected. Illuminance particularly affected their activity.Among the possible management options to reduce the effect of light pollution at night (reduction of light intrusion by modifying the height of street lamps, lighting intensity, spectral composition), the removal of light sources, or at least the reduction of illuminance, seems to be the most effective option. Due to its strong impact on highly protected species, we urge the need to manage lighting, in particular in protected areas. Capsule: Artificial light at night had a negative effect on clutter bats activity (90% reduction of bat activity) and among streetlight characteristics illuminance was the most relevant. Data accessibility: Data used for statistical analysis are include in Appendix C. Acoustic row data was delivered to the citizen science program “VigieChiro” (https://vigiechiro.herokuapp.com/).
Published: 2021

20. Vulnerability of the North Water ecosystem to climate change

Author: Mark Nuttall, Sebastian Wetterich, Rebecca Jackson, Thomas Davidson, Simone Wengrat, Erik Jeppesen, Andrew C. G. Henderson, Sami J. Taipale, Jari Syväranta, William Colgan, Guillaume Massé, Kaarina Weckström, Steffen M. Olsen, Sofia Ribeiro, Jacques Giraudeau, Eleanor Georgiadis, Thorbjørn Joest Andersen, Antoon Kuijpers, Bjarne Grønnow, Audrey Limoges, Astrid Strunk, Jesper V. Olsen, Xavier Crosta, Kasper Lambert Johansen, Helen Mackay, Martin Nissen, Anders Mosbech, Nicolaj K. Larsen, Naja Mikkelsen, Geological Survey of Denmark and Greenland (GEUS), Variabilité de l'Océan et de la Glace de mer (VOG), Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN), Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Station de Biologie Marine de Concarneau, Direction générale déléguée à la Recherche, à l’Expertise, à la Valorisation et à l’Enseignement-Formation (DGD.REVE), Muséum national d'Histoire naturelle (MNHN)-Muséum national d'Histoire naturelle (MNHN), Aarhus University [Aarhus], Helsinki Institute of Sustainability Science (HELSUS), Faculty of Biological and Environmental Sciences [Helsinki], Helsingin yliopisto = Helsingfors universitet = University of Helsinki-Helsingin yliopisto = Helsingfors universitet = University of Helsinki, Takuvik International Research Laboratory, Université Laval [Québec] (ULaval)-Centre National de la Recherche Scientifique (CNRS), Environnements et Paléoenvironnements OCéaniques (EPOC), Observatoire aquitain des sciences de l'univers (OASU), Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-École Pratique des Hautes Études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Danish Meteorological Institute (DMI), Department of Geosciences and Natural Resource Management [Copenhagen] (IGN), Faculty of Science [Copenhagen], University of Copenhagen = Københavns Universitet (UCPH)-University of Copenhagen = Københavns Universitet (UCPH), Alfred Wegener Institute [Potsdam], Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung (AWI), University of Eastern Finland, The School of Geography, Politics and Sociology, Newcastle University, Department of Geography (UNIVERSITé DE DURHAM), Durham University, Department of Biological and Environmental Science [Jyväskylä Univ] (JYU), University of Jyväskylä (JYU), Aarhus University Hospital, Middle East Technical University [Ankara] (METU), SINO-DANISH CENTRE FOR EDUCATION AND RESEARCH BEIJING CHN, Partenaires IRSTEA, Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA), Centre for GeoGenetics, Natural History Museum of Denmark, University of Copenhagen = Københavns Universitet (UCPH)-University of Copenhagen = Københavns Universitet (UCPH)-Faculty of Science [Copenhagen], Limnological Institute, University of Konstanz, Greenland Institute of Natural Resources (GINR), University of Alberta, National Museum of Denmark, Department of Conservation, Institut Pierre-Simon-Laplace (IPSL (FR_636)), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)-Institut de Recherche pour le Développement (IRD)-Muséum national d'Histoire naturelle (MNHN)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Institut Pierre-Simon-Laplace (IPSL (FR_636)), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)-Institut de Recherche pour le Développement (IRD)-Muséum national d'Histoire naturelle (MNHN)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU), UMR 5805 Environnements et Paléoenvironnements Océaniques et Continentaux (EPOC), Université Sciences et Technologies - Bordeaux 1-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-École pratique des hautes études (EPHE), Ecosystems and Environment Research Programme, Environmental Change Research Unit (ECRU), Biosciences, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPC)-École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPC)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPC)
Subjects: DYNAMICS, 010504 meteorology & atmospheric sciences, Ecosystem ecology, General Physics and Astronomy, Palaeoclimate, 01 natural sciences, palaeoceanography, Palaeoceanography, TEMPERATURES, ilmasto, HOLOCENE, Holocene, [SDU.OCEAN]Sciences of the Universe [physics]/Ocean, Atmosphere, 0303 health sciences, arktinen alue, Multidisciplinary, Ecology, Aquatic ecosystem, Climate-change ecology, ecosystem ecology, RECORD, GREENLAND, VARIABILITY, [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology, lämpeneminen, SEA-ICE, ATLANTIC OSCILLATION, SEDIMENTS, climate-change ecology, Science, Grönlanti, Climate change, inuitit, palaeoclimate, General Biochemistry, Genetics and Molecular Biology, Article, 03 medical and health sciences, ddc:570, Ecosystem, RECONSTRUCTION, 14. Life underwater, Keystone species, 1172 Environmental sciences, [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography, 030304 developmental biology, 0105 earth and related environmental sciences, Global warming, General Chemistry, 15. Life on land, ilmastonmuutokset, ekosysteemit (ekologia), Arctic, 13. Climate action, merijää, paleoklimatologia
Abstract: High Arctic ecosystems and Indigenous livelihoods are tightly linked and exposed to climate change, yet assessing their sensitivity requires a long-term perspective. Here, we assess the vulnerability of the North Water polynya, a unique seaice ecosystem that sustains the world’s northernmost Inuit communities and several keystone Arctic species. We reconstruct mid-to-late Holocene changes in sea ice, marine primary production, and little auk colony dynamics through multi-proxy analysis of marine and lake sediment cores. Our results suggest a productive ecosystem by 4400–4200 cal yrs b2k coincident with the arrival of the first humans in Greenland. Climate forcing during the late Holocene, leading to periods of polynya instability and marine productivity decline, is strikingly coeval with the human abandonment of Greenland from c. 2200–1200 cal yrs b2k. Our long-term perspective highlights the future decline of the North Water ecosystem, due to climate warming and changing sea-ice conditions, as an important climate change risk., The North Water polynya is a unique but vulnerable ecosystem, home to Indigenous people and Arctic keystone species. New palaeoecological records from Greenland suggest human abandonment c. 2200–1200 cal yrs BP occurred during climate-forced polynya instability, foreshadowing future ecosystem declines.
Published: 2021

21. Holocene polynya dynamics and their interaction with oceanic heat transport in northernmost Baffin Bay

Author: Guillaume Massé, Steffen M. Olsen, Rebecca Jackson, Petra Tallberg, Lukas Wacker, Audrey Limoges, Eleanor Georgiadis, Thorbjørn Joest Andersen, Sofia Ribeiro, Anna Bang Kvorning, Jacques Giraudeau, Naja Mikkelsen, Environnements et Paléoenvironnements OCéaniques (EPOC), Observatoire aquitain des sciences de l'univers (OASU), Université Sciences et Technologies - Bordeaux 1-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Ecosystems and Environment Research Programme, Biosciences, Marine Ecosystems Research Group, Department of Glaciology and Climate, Geological Survey of Denmark and Greenland (GEUS), Department of Earth Sciences, University of New Brunswick, University of New Brunswick (UNB), Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-École Pratique des Hautes Études (EPHE), Danish Meteorological Institute (DMI), Faculty of Biological and Environmental Sciences [Helsinki], Helsingin yliopisto = Helsingfors universitet = University of Helsinki, Department of Geosciences and Natural Resource Management [Copenhagen] (IGN), Faculty of Science [Copenhagen], University of Copenhagen = Københavns Universitet (UCPH)-University of Copenhagen = Københavns Universitet (UCPH), Station de Biologie Marine de Concarneau, Direction générale déléguée à la Recherche, à l’Expertise, à la Valorisation et à l’Enseignement-Formation (DGD.REVE), Muséum national d'Histoire naturelle (MNHN)-Muséum national d'Histoire naturelle (MNHN), Variabilité de l'Océan et de la Glace de mer (VOG), Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN), Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Takuvik International Research Laboratory, Université Laval [Québec] (ULaval)-Centre National de la Recherche Scientifique (CNRS), Ion Beam Physics [ETH Zürich], and Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] (ETH Zürich)
Subjects: SHELF, 1171 Geosciences, 010506 paleontology, Water mass, 010504 meteorology & atmospheric sciences, Science, Palaeoclimate, 01 natural sciences, Deep sea, Article, Palaeoceanography, PALAEO SEA-ICE, STORFJORDEN, 14. Life underwater, NORTH WATER POLYNYA, ASSEMBLAGES, Roman Warm Period, DEEP-SEA, Holocene, 1172 Environmental sciences, [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography, 0105 earth and related environmental sciences, BENTHONIC FORAMINIFERA, geography, Multidisciplinary, geography.geographical_feature_category, Sediment, Glacier, GREENLAND, BENTHIC FORAMINIFERA, Oceanography, 13. Climate action, [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology, Warm water, Medicine, NARES STRAIT, Bay, Geology
Abstract: Baffin Bay hosts the largest and most productive of the Arctic polynyas: the North Water (NOW). Despite its significance and active role in water mass formation, the history of the NOW beyond the observational era remains poorly known. We reconcile the previously unassessed relationship between long-term NOW dynamics and ocean conditions by applying a multiproxy approach to two marine sediment cores from the region that, together, span the Holocene. Declining influence of Atlantic Water in the NOW is coeval with regional records that indicate the inception of a strong and recurrent polynya from ~ 4400 yrs BP, in line with Neoglacial cooling. During warmer Holocene intervals such as the Roman Warm Period, a weaker NOW is evident, and its reduced capacity to influence bottom ocean conditions facilitated northward penetration of Atlantic Water. Future warming in the Arctic may have negative consequences for this vital biological oasis, with the potential knock-on effect of warm water penetration further north and intensified melt of the marine-terminating glaciers that flank the coast of northwest Greenland.
Published: 2021

22. Chlordecone-contaminated epilithic biofilms show increased adsorption capacities

Author: Cédric Hubas, Dominique Monti, Jean-Michel Mortillaro, Sylvie Augagneur, Anne Carbon, Robert Duran, Solange Karama, Tarik Meziane, Patrick Pardon, Théo Risser, Nathalie Tapie, Najet Thiney, Hélène Budzinski, Béatrice Lauga, Biologie des Organismes et Ecosystèmes Aquatiques (BOREA), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA), Station de Biologie Marine de Concarneau, Direction générale déléguée à la Recherche, à l’Expertise, à la Valorisation et à l’Enseignement-Formation (DGD.REVE), Muséum national d'Histoire naturelle (MNHN)-Muséum national d'Histoire naturelle (MNHN), Muséum national d'Histoire naturelle (MNHN), Institut de Systématique, Evolution, Biodiversité (ISYEB ), Muséum national d'Histoire naturelle (MNHN)-École Pratique des Hautes Études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA), Université des Antilles (Pôle Guadeloupe), Université des Antilles (UA), Institut des Sciences de l'Evolution de Montpellier (UMR ISEM), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-École Pratique des Hautes Études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut de recherche pour le développement [IRD] : UR226-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM), Département Performances des systèmes de production et de transformation tropicaux (Cirad-PERSYST), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad), Environnements et Paléoenvironnements OCéaniques (EPOC), Observatoire aquitain des sciences de l'univers (OASU), Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-École Pratique des Hautes Études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS), Université de Pau et des Pays de l'Adour (UPPA), Institut des sciences analytiques et de physico-chimie pour l'environnement et les materiaux (IPREM), Université de Pau et des Pays de l'Adour (UPPA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Earth and Planetary Observation Centre (EPOC), and University of Stirling
Subjects: congenital, hereditary, and neonatal diseases and abnormalities, Insecticides, Environmental Engineering, Lipophilic pigments, Biochimie, Epilithic biofilms, Monosaccharide, Microbial communities, Film comestible, Pollution par l'agriculture, Extracellular polymeric substances, Contamination, T-RFLP, Animals, Environmental Chemistry, Marqueur génétique, Fatty acids, Waste Management and Disposal, Ecosystem, Caribbean, [SDV.BID.EVO]Life Sciences [q-bio]/Biodiversity/Populations and Evolution [q-bio.PE], Monosaccharides, Composition chimique, [SDE.ES]Environmental Sciences/Environmental and Society, Pollution, U50 - Sciences physiques et chimie, respiratory tract diseases, [SDV.MP]Life Sciences [q-bio]/Microbiology and Parasitology, Chlordecone, Biofilms, Adsorption, [SDE.BE]Environmental Sciences/Biodiversity and Ecology, Chlordécone, P02 - Pollution
Abstract: International audience; The rivers of Guadeloupe and Martinique (French West Indies) show high levels of chlordecone (CLD) contamination. This persistent molecule has a dramatic impact on both aquatic ecosystems and human health. In these rivers, epilithic biofilms are the main endogenous primary producers and represent a central food source for fish and crustaceans. Recently, their viscoelastic properties have been shown to be effective in bio-assessing pollution in tropical environments. As these properties are closely related to the biochemical composition of the biofilms, biochemical (fatty acids, pigments, extracellular polymeric substances (EPS) monosaccharides) and molecular markers (T-RFLP fingerprints of bacteria, archaea and eukaryotes) were investigated. Strong links between CLD pollution and both biofilm biochemistry and microbial community composition were found. In particular, high levels of CLD were linked with modified exo-polysaccharides corresponding to carbohydrates with enhanced adsorption and adhesion properties. The observed change probably resulted from a preferential interaction between CLD and sugars and/or a differential microbial secretion of EPS in response to the pollutant. These changes were expected to impact viscoelastic properties of epilithic biofilms highlighting the effect of CLD pollution on biofilm EPS matrix. They also suggested that microorganisms implement a CLD scavenging strategy, providing new insights on the role of EPS in the adaptation of microorganisms to CLD-polluted environments.
Published: 2022

23. The Malina oceanographic expedition: How do changes in ice cover, permafrost and UV radiation impact biodiversity and biogeochemical fluxes in the Arctic Ocean?

Author: P. Massicotte, R. M. W. Amon, D. Antoine, P. Archambault, S. Balzano, S. Bélanger, R. Benner, D. Boeuf, A. Bricaud, F. Bruyant, G. Chaillou, M. Chami, B. Charrière, J. Chen, H. Claustre, P. Coupel, N. Delsaut, D. Doxaran, J. Ehn, C. Fichot, M.-H. Forget, P. Fu, J. Gagnon, N. Garcia, B. Gasser, J.-F. Ghiglione, G. Gorsky, M. Gosselin, P. Gourvil, Y. Gratton, P. Guillot, H. J. Heipieper, S. Heussner, S. B. Hooker, Y. Huot, C. Jeanthon, W. Jeffrey, F. Joux, K. Kawamura, B. Lansard, E. Leymarie, H. Link, C. Lovejoy, C. Marec, D. Marie, J. Martin, J. Martín, G. Massé, A. Matsuoka, V. McKague, A. Mignot, W. L. Miller, J.-C. Miquel, A. Mucci, K. Ono, E. Ortega-Retuerta, C. Panagiotopoulos, T. Papakyriakou, M. Picheral, L. Prieur, P. Raimbault, J. Ras, R. A. Reynolds, A. Rochon, J.-F. Rontani, C. Schmechtig, S. Schmidt, R. Sempéré, Y. Shen, G. Song, D. Stramski, E. Tachibana, A. Thirouard, I. Tolosa, J.-É. Tremblay, M. Vaïtilingom, D. Vaulot, F. Vaultier, J. K. Volkman, H. Xie, G. Zheng, M. Babin, Takuvik Joint International Laboratory ULAVAL-CNRS, Université Laval [Québec] (ULaval)-Centre National de la Recherche Scientifique (CNRS), Department of Marine and Coastal Environmental Science [Galveston], Texas A&M University [Galveston], Department of Oceanography [College Station], Texas A&M University [College Station], School of Earth and Planetary Sciences [Perth], Curtin University [Perth], Planning and Transport Research Centre (PATREC)-Planning and Transport Research Centre (PATREC), Laboratoire d'océanographie de Villefranche (LOV), Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut de la Mer de Villefranche (IMEV), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Station biologique de Roscoff (SBR), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Royal Netherlands Institute for Sea Research (NIOZ), Stazione Zoologica Anton Dohrn (SZN), Departement de Biologie, Chimie et Géographie, Université du Québec à Rimouski (UQAR), School of the Earth, Ocean and Environment [Columbia] (SEOE), University of South Carolina [Columbia], Department of Biological Sciences [Columbia], Institut des Sciences de la MER de Rimouski (ISMER), TROPO - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Sorbonne Université (SU)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS), Centre de Formation et de Recherche sur les Environnements Méditérranéens (CEFREM), Université de Perpignan Via Domitia (UPVD)-Centre National de la Recherche Scientifique (CNRS), State key Laboratory of Environmental Geochemistry [Guiyang] (SKLEG), Institute of Geochemistry [Guiyang], Chinese Academy of Sciences [Beijing] (CAS)-Chinese Academy of Sciences [Beijing] (CAS), Centre for Earth Observation Science [Winnipeg], University of Manitoba [Winnipeg], Department of Earth and Environment [Boston], Boston University [Boston] (BU), Institute of Surface-Earth System Science of Tianjin University, Tianjin University (TJU), Institut méditerranéen d'océanologie (MIO), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Toulon (UTLN), Laboratoire d'Océanographie Microbienne (LOMIC), Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire océanologique de Banyuls (OOB), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Centre Eau Terre Environnement [Québec] (INRS - ETE), Institut National de la Recherche Scientifique [Québec] (INRS), Department of Environmental Biotechnology [UFZ Leipzig], Helmholtz Centre for Environmental Research (UFZ), GSFC Ocean Ecology Laborator, NASA Goddard Space Flight Center (GSFC), Département de géomatique appliquée [Sherbrooke] (UdeS), Université de Sherbrooke (UdeS), Center for Environmental Diagnostics and Bioremediation, University of west Florida, Chubu Institute for Advanced Studies (CIAS), Chubu University, Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] (LSCE), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Department of Maritime Systems [Rostock], Universität Rostock, Institut Universitaire Européen de la Mer (IUEM), Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS), Station de Biologie Marine de Concarneau, Direction générale déléguée à la Recherche, à l’Expertise, à la Valorisation et à l’Enseignement-Formation (DGD.REVE), Muséum national d'Histoire naturelle (MNHN)-Muséum national d'Histoire naturelle (MNHN), Variabilité de l'Océan et de la Glace de mer (VOG), Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN), Sorbonne Université (SU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut Pierre-Simon-Laplace (IPSL (FR_636)), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)-Sorbonne Université (SU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut Pierre-Simon-Laplace (IPSL (FR_636)), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Center for Marine and Environmental Studies (CMES), University of the Virgin Islands (UVI), Mercator Océan, Société Civile CNRS Ifremer IRD Météo-France SHOM, Department of Marine Sciences [Athens], University of Georgia [USA], International Atomic Energy Agency - Environment Laboratories Monaco (IAEA-EL), Centre de recherche sur la dynamique du système Terre (GEOTOP), Université de Montréal (UdeM)-McGill University = Université McGill [Montréal, Canada]-École Polytechnique de Montréal (EPM)-Concordia University [Montreal]-Université du Québec à Rimouski (UQAR)-Université du Québec à Montréal = University of Québec in Montréal (UQAM)-Université du Québec en Abitibi-Témiscamingue (UQAT), Department of Earth and Planetary Sciences [Montréal] (EPS), McGill University = Université McGill [Montréal, Canada], Institute of Low Temperature Science [Sapporo], Hokkaido University [Sapporo, Japan], Alfred Wegener Institute for Polar and Marine Research (AWI), Helmholtz Institute for Functional Marine Biodiversity at the University of Oldenburg (HIFMB), Carl Von Ossietzky Universität Oldenburg, Marine Physical Laboratory (MPL), Scripps Institution of Oceanography (SIO), University of California [San Diego] (UC San Diego), University of California-University of California-University of California [San Diego] (UC San Diego), University of California-University of California, Observatoire des sciences de l'univers Ecce Terra (ECCE TERRA), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), UMR 5805 Environnements et Paléoenvironnements Océaniques et Continentaux (EPOC), Observatoire aquitain des sciences de l'univers (OASU), Université Sciences et Technologies - Bordeaux 1-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), State Key Laboratory of Marine Environmental Science (MEL), Xiamen University, School of Marine Science and Technology [Tianjin], Department of Physics [Columbus], Ohio State University [Columbus] (OSU), Laboratoire de Recherche en Géosciences et Energies (LARGE), Université des Antilles (UA), Asian School of the Environment (ASE), Nanyang Technological University [Singapour], CSIRO Marine and Atmospheric Research (CSIRO-MAR), Commonwealth Scientific and Industrial Research Organisation [Canberra] (CSIRO), CSIRO Wealth from Oceans National Research Flagship, University of Tasmania [Hobart, Australia] (UTAS), Department of Earth Sciences [Amsterdam], VU University Amsterdam, NOAA Center for Satellite Applications and Research (STAR), NOAA National Environmental Satellite, Data, and Information Service (NESDIS), National Oceanic and Atmospheric Administration (NOAA)-National Oceanic and Atmospheric Administration (NOAA), Earth Science System Interdisciplinary Center [College Park] (ESSIC), College of Computer, Mathematical, and Natural Sciences [College Park], University of Maryland [College Park], University of Maryland System-University of Maryland System-University of Maryland [College Park], University of Maryland System-University of Maryland System, Centre National de la Recherche Scientifique (CNRS)-Université Laval [Québec] (ULaval), Université Laval [Québec] (ULaval)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Université de Perpignan Via Domitia (UPVD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Observatoire océanologique de Banyuls (OOB), Fédération de recherche de Roscoff (FR2424), Helmholtz Zentrum für Umweltforschung = Helmholtz Centre for Environmental Research (UFZ), Center for Environmental Diagnostics and Bioremediation [Pensacola] (UWF | CEDB), University of West Florida [Pensacola] (UWF), Océan et Interfaces (OCEANIS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Centro Austral de Investigaciones Científicas [Ushuaia] (CADIC), Consejo Nacional de Investigaciones Científicas y Técnicas [Buenos Aires] (CONICET), Instituto de Ciencias Polares, Ambiente y Recursos Naturales (ICPA), Universidad Nacional de Tierra del Fuego, Antártida e islas del Atlántico Sur (UNTDF), Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER), École Polytechnique de Montréal (EPM)-McGill University = Université McGill [Montréal, Canada]-Université de Montréal (UdeM)-Université du Québec en Abitibi-Témiscamingue (UQAT)-Université du Québec à Rimouski (UQAR)-Concordia University [Montreal]-Université du Québec à Montréal = University of Québec in Montréal (UQAM), Carl Von Ossietzky Universität Oldenburg = Carl von Ossietzky University of Oldenburg (OFFIS), Scripps Institution of Oceanography (SIO - UC San Diego), University of California (UC)-University of California (UC)-University of California [San Diego] (UC San Diego), University of California (UC)-University of California (UC), Observatoire des sciences de l'univers Ecce Terra [Paris] (OSU ECCE TERRA), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Environnements et Paléoenvironnements OCéaniques (EPOC), Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-École Pratique des Hautes Études (EPHE), Laboratoire de Recherche en Géosciences et Energies [UR2_1] (LARGE), Vrije Universiteit Amsterdam [Amsterdam] (VU), ANR-08-BLAN-0308,Malina,How changes in ice cover, permafrost and UV radiation impact on biodiversity and biogeochemical fluxes in the Arctic Ocean(2008), European Project: 0713915(2007), European Project: 1504137(2015), European Project: 0229302(2002), European Project: 0425582(2004), European Project: 0713991(2007), Asian School of the Environment, Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), Institut Pierre-Simon-Laplace (IPSL (FR_636)), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)-Institut de Recherche pour le Développement (IRD)-Muséum national d'Histoire naturelle (MNHN)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Institut Pierre-Simon-Laplace (IPSL (FR_636)), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)-Institut de Recherche pour le Développement (IRD)-Muséum national d'Histoire naturelle (MNHN)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU), Observatoire des sciences de l'univers Ecce Terra [Paris] (ECCE TERRA), and Vrije universiteit = Free university of Amsterdam [Amsterdam] (VU)
Subjects: 0106 biological sciences, Biogeochemical cycle, Temperature Rise, 010504 meteorology & atmospheric sciences, BEAUFORT SEA, Ice field, SEA ICE, Geology [Science], Permafrost, 01 natural sciences, purl.org/becyt/ford/1 [https], purl.org/becyt/ford/1.5 [https], Phytoplankton, 14. Life underwater, Transect, lcsh:Environmental sciences, [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography, 0105 earth and related environmental sciences, lcsh:GE1-350, [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph], geography, geography.geographical_feature_category, ARCTIC OCEAN, 010604 marine biology & hydrobiology, lcsh:QE1-996.5, Permafrost Thawing, Pelagic zone, Estuary, lcsh:Geology, Oceanography, Arctic, 13. Climate action, [SDE]Environmental Sciences, General Earth and Planetary Sciences, Environmental science, MALINA
Abstract: The MALINA oceanographic campaign was conducted during summer 2009 to investigate the carbon stocks and the processes controlling the carbon fluxes in the Mackenzie River estuary and the Beaufort Sea. During the campaign, an extensive suite of physical, chemical and biological variables were measured across seven shelf basin transects (south north) to capture the meridional gradient between the estuary and the open ocean. Key variables such as temperature, absolute salinity, radiance, irradiance, nutrient concentrations, chlorophyll a concentration, bacteria, phytoplankton and zooplankton abundance and taxonomy, and carbon stocks and fluxes were routinely measured onboard the Canadian research icebreaker CCGS Amundsen and from a barge in shallow coastal areas or for sampling within broken ice fields. Here, we present the results of a joint effort to compile and standardize the collected data sets that will facilitate their reuse in further studies of the changing Arctic Ocean. Fil: Massicotte, Philippe. Laval University; Canadá Fil: Amon, Rainer. Texas A&M University; Estados Unidos Fil: Antoine, David. Université Pierre et Marie Curie; Francia Fil: Archambault, Philippe. Laval University; Canadá Fil: Balzano, Sergio. Université Pierre et Marie Curie; Francia Fil: Bélanger, Simon. Université du Québec a Montreal; Canadá Fil: Benner, Ronald. University Of South Carolina; Estados Unidos Fil: Boeuf, Dominique. Université Pierre et Marie Curie; Francia Fil: Bricaud, Annick. Université Pierre et Marie Curie; Francia Fil: Bruyant, Flavienne. Laval University; Canadá Fil: Chaillou, Gwenaelle. Institut Des Sciences de la Mer de Rimouski; Canadá Fil: Chami, Malik. Université Pierre et Marie Curie; Francia Fil: Charrière, Bruno. Universite de Perpignan; Francia Fil: Chen, Jing. Tianjin University; China Fil: Claustre, Herve. Université Pierre et Marie Curie; Francia Fil: Coupel, Pierre. Laval University; Canadá Fil: Delsaut, Nicole. Universite de Perpignan; Francia Fil: Doxaran, David. Université Pierre et Marie Curie; Francia Fil: Ehn, Jens. University of Manitoba; Canadá Fil: Fichot, Cedric. Boston University; Estados Unidos Fil: Forget, Marie Helene. Laval University; Canadá Fil: Fu, Pingqing. Tianjin University; China Fil: Gagnon, Jonathan. Laval University; Canadá Fil: Garcia, Nicole. Aix Marseille Université; Francia Fil: Gasser, Beat. No especifíca; Fil: Ghiglione, Jean Francois. Université Pierre et Marie Curie; Francia Fil: Gorsky, Gaby. Université Pierre et Marie Curie; Francia Fil: Gosselin, Michel. Institut Des Sciences de la Mer de Rimouski; Canadá Fil: Gourvil, Priscillia. Université Pierre et Marie Curie; Francia Fil: Gratton, Yves. Centre Eau Terre Environnement; Canadá Fil: Guillot, Pascal. Institut Des Sciences de la Mer de Rimouski; Canadá Fil: Heipieper, Hermann. Helmholtz Zentrum Für Umweltforschung; Alemania Fil: Heussner, Serge. Universite de Perpignan; Francia Fil: Hooker, Stanford. Nasa Goddard Space Flight Center; Estados Unidos Fil: Huot, Yannick. University of Sherbrooke; Canadá Fil: Jeanthon, Christian. Université Pierre et Marie Curie; Francia Fil: Jeffrey, Wade. University Of West Florida; Estados Unidos Fil: Joux, Fabien. Université Pierre et Marie Curie; Francia Fil: Kawamura, Kimitaka. Chubu University; Japón Fil: Lansard, Bruno. No especifíca; Fil: Leymarie, Edouard. Université Pierre et Marie Curie; Francia Fil: Link, Heike. Universität Rostock; Alemania Fil: Lovejoy, Connie. Laval University; Canadá Fil: Marec, Claudie. Laval University; Canadá. Universite de Bretagne Occidentale; Francia Fil: Marie, Dominique. Université Pierre et Marie Curie; Francia Fil: Martin, Johannie. Laval University; Canadá Fil: Martín de Nascimento, Jacobo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina Fil: Massé, Guillaume. Laval University; Canadá Fil: Matsuoka, Atsushi. Laval University; Canadá Fil: McKague, Vanessa. University of Virginia; Estados Unidos Fil: Mignot, Alexandre. Université Pierre et Marie Curie; Francia Fil: Miller, William. University of Georgia; Estados Unidos Fil: Miquel, Juan Carlos. No especifíca; Fil: Mucci, Alfonso. McGill University; Canadá Fil: Ono, Kaori. No especifíca; Fil: Ortega-Retuerta, Eva. Université Pierre et Marie Curie; Francia Fil: Panagiotopoulos, Christos. Aix Marseille Université Marsella.; Francia Fil: Papakyriakou, Tim. University of Manitoba; Canadá Fil: Picheral, Marc. Université Pierre et Marie Curie; Francia Fil: Prieur, Louis. Université Pierre et Marie Curie; Francia Fil: Raimbault, Patrick. No especifíca; Fil: Ras, Josephine. Université Pierre et Marie Curie; Francia Fil: Reynolds, Rick. Marine Physical Laboratory; Estados Unidos Fil: Rochon, Andre. Institut Des Sciences de la Mer de Rimouski; Canadá Fil: Rontani, Jean Francois. Aix Marseille Université; Francia Fil: Schmechtig, Catherine. Observatoire Des Sciences de L'univers; Francia Fil: Schmidt, Sabine. No especifíca; Fil: Sempéré, Richard. Aix Marseille Université,Marsella.; Francia Fil: Shen, Yuan. No especifíca; Fil: Song, Guisheng. Tianjin University; China Fil: Stramski, Dariusz. Marine Physical Laboratory; Francia Fil: Tachibana, Eri. Hokkaido University; Japón Fil: Thirouard, Alexandre. Université Pierre et Marie Curie; Francia Fil: Tolosa, Imma. No especifíca; Fil: Tremblay, Jean Eric. Laval University; Canadá Fil: Vaïtilingom, Mickael. Université Des Antilles; Francia Fil: Vaulot, Daniel. Université Pierre et Marie Curie; Francia Fil: Vaultier, Frederic. Aix Marseille Université; Francia Fil: Volkman, John. Csiro Marine And Atmospheric Research; Australia Fil: Xie, Huixiang. Institut Des Sciences de la Mer de Rimouski; Canadá Fil: Zheng, Guangming. University of Maryland; Estados Unidos Fil: Babin, Marcel. Laval University; Canadá
Published: 2021

24. First Assessment of the Benthic Meiofauna Sensitivity to Low Human-Impacted Mangroves in French Guiana

Author: Gilbert Franck, Claire Michelet, Guillaume Dirberg, Amonda El Houssainy, Isabelle Bihannic, Elisa Baldrighi, Emma Michaud, Baptiste Vivier, Romain Walcker, Cédric Hubas, Cécile Militon, Léa Sylvi, Aurélie Dufour, Justine Receveur, Ronan Jézéquel, Lars-Eric Heimbürger-Boavida, Daniela Zeppilli, Philippe Cuny, Dominique Lamy, Centre National de la Recherche Scientifique - CNRS (FRANCE), Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE), Université Toulouse III - Paul Sabatier - UT3 (FRANCE), Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR), Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM), Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER), Biologie des Organismes et Ecosystèmes Aquatiques (BOREA), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA), Station de Biologie Marine de Concarneau, Direction générale déléguée à la Recherche, à l’Expertise, à la Valorisation et à l’Enseignement-Formation (DGD.REVE), Muséum national d'Histoire naturelle (MNHN)-Muséum national d'Histoire naturelle (MNHN), Muséum national d'Histoire naturelle (MNHN), Institut méditerranéen d'océanologie (MIO), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Ecologie Fonctionnelle et Environnement (LEFE), Institut Ecologie et Environnement (INEE), Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT), Centre de documentation de recherche et d'expérimentations sur les pollutions accidentelles des eaux (Cedre), Cedre, ANR-10-LABX-0025,CEBA,CEnter of the study of Biodiversity in Amazonia(2010), European Project: 1166-39417,FEDER, Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Sorbonne Université (SU)-Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU), Laboratoire Ecologie Fonctionnelle et Environnement (ECOLAB), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut Ecologie et Environnement (INEE), Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS), and Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP)
Subjects: 0106 biological sciences, Meiobenthos, nematode, Biodiversité et Ecologie, Meiofauna, Biodiversity, Anthropogenic pressures, Biology, 010603 evolutionary biology, 01 natural sciences, Mangroves, Dominance (ecology), Ecosystem, 14. Life underwater, Trophic level, biodiversity, Nematode, Ecology, 010604 marine biology & hydrobiology, mangroves, Forestry, lcsh:QK900-989, 15. Life on land, South America, natural contamination, 13. Climate action, Benthic zone, meiofauna, Natural contamination, lcsh:Plant ecology, anthropogenic pressures, Mangrove, [SDE.BE]Environmental Sciences/Biodiversity and Ecology, Bioindicator
Abstract: International audience; Bioindicators assess the mangroves ecological state according to the types of pressures but they differ with the ecosystem’s specificities. We investigated benthic meiofauna diversity and structure within the low human-impacted mangroves in French Guiana (South America) in response to sediment variables with various distances to the main city. Contaminant’s concentrations differed among the stations, but they remained below toxicity guidelines. Meiofauna structure (Foraminifera, Kinorhyncha, Nematoda) however varied accordingly. Nematode’s identification brought details on the sediment’s quality. The opportunistic genus Paraethmolaimus (Jensen, 1994) strongly correlated to the higher concentrations of Hg, Pb. Anoxic sediments were marked by organic enrichment in pesticides, PCB, and mangrove litter products and dominance of two tolerant genus, Terschellingia (de Man, 1888) and Spirinia (Gerlach, 1963). In each of these two stations, we found many Desmodora individuals (de Man, 1889) with the presence of epibionts highlighting the nematodes decreased fitness and defenses. Oxic sediments without contaminants were distinguished by the sensitive genera Pseudocella (Filipjev, 1927) and a higher diversity of trophic groups. Our results suggested a nematodes sensitivity to low contaminants concentrations. Further investigations at different spatio-temporal scales and levels of deterioration, would be necessary to use of this group as bioindicator of the mangroves’ ecological status; Les bioindicateurs évaluent l'état écologique des mangroves en fonction des types de pressions mais ils diffèrent selon les spécificités de l'écosystème. Nous avons étudié la diversité et la structure de la méiofaune benthique dans des mangroves à faible impact humain en Guyane française (Amérique du Sud) en réponse à des variables sédimentaires et à différentes distances de la ville principale. Les concentrations de contaminants différaient selon les stations, mais elles restaient inférieures aux recommandations de toxicité. La structure de la méiofaune (Foraminifera, Kinorhyncha, Nematoda) a cependant varié en conséquence. L'identification des nématodes a apporté des détails sur la qualité des sédiments. Le genre opportuniste Paraethmolaimus (Jensen, 1994) était fortement corrélé aux concentrations plus élevées de Hg, Pb. Les sédiments anoxiques étaient marqués par un enrichissement organique en pesticides, PCB, et produits de la litière de mangrove et par la dominance de deux genres tolérants, Terschellingia (de Man, 1888) et Spirinia (Gerlach, 1963). Dans chacune de ces deux stations, nous avons trouvé de nombreux individus Desmodora (de Man, 1889) avec la présence d'épibiontes mettant en évidence la diminution de la fitness et des capacités de défense des nématodes. Les sédiments oxiques sans contaminants se distinguaient par la présence de genres sensibles Pseudocella (Filipjev, 1927) et une plus grande diversité de groupes trophiques. Nos résultats suggèrent une sensibilité des nématodes à de faibles concentrations de contaminants. Des études supplémentaires à différentes échelles spatio-temporelles et à différents niveaux de détérioration seraient nécessaires pour utiliser ce groupe comme bioindicateur de l'état écologique des mangroves.
Published: 2021

25. Intertidal ecosystem engineer species promote benthic-pelagic coupling and diversify trophic pathways

Author: Nicolas Desroy, Stanislas F. Dubois, Jérôme Fournier, Auriane G. Jones, Dynamiques de l'Environnement Côtier (DYNECO), Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER), MARine Biodiversity Exploitation and Conservation (UMR MARBEC), Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut de Recherche pour le Développement (IRD), Écologie et santé des écosystèmes (ESE), Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-AGROCAMPUS OUEST, Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), Laboratoire Environnement Ressources Bretagne Occidentale (LER-BO), Centre d'Ecologie et des Sciences de la COnservation (CESCO), Muséum national d'Histoire naturelle (MNHN)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Station de Biologie Marine de Concarneau, Direction générale déléguée à la Recherche, à l’Expertise, à la Valorisation et à l’Enseignement-Formation (DGD.REVE), Muséum national d'Histoire naturelle (MNHN)-Muséum national d'Histoire naturelle (MNHN), Interdisciplinary Graduate School for the Blue planet, ANR-17-EURE-0015,ISBlue,Interdisciplinary Graduate School for the Blue planet(2017), AGROCAMPUS OUEST, Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Dynamiques des Écosystèmes Côtiers (DYNECO), Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-INSTITUT AGRO Agrocampus Ouest, Laboratoire Environnement Ressource de Bretagne Occidentale (LERBO), LITTORAL (LITTORAL), and Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)
Subjects: 0106 biological sciences, Suspension-feeding, Aquatic Science, Intertidal ecology, 010603 evolutionary biology, 01 natural sciences, Gardening hypothesis, 14. Life underwater, Ecology, Evolution, Behavior and Systematics, Trophic level, Stable isotopes, Ecology, Stable isotope ratio, 010604 marine biology & hydrobiology, Microphytobenthos, Pelagic zone, Food web, Habitat modifier, 15. Life on land, Coupling (computer programming), Non-trophic interactions, Benthic zone, [SDE]Environmental Sciences, Environmental science
Abstract: Ecosystem engineering is a ubiquitous process by which the biological activity of a species shapes habitat diversity and often creates local biodiversity hotspots. The honeycomb-worm Sabellaria alveolata, an intertidal ecosystem engineer, actively builds reefs across Europe by aggregating sand. Here, we used carbon and nitrogen isotopic compositions measured on basal resources and bentho-demersal consumers (fish, mega- and macroinvertebrates) to empirically investigate how non-trophic interactions (ecosystem engineering) modify food web structure and functioning. Three sediment types corresponding to different substrata and species assemblages were sampled: a control soft sediment (medium to muddy sand, before the establishment of S. alveolata), the sediment engineered by S. alveolata (hardened 3D structures), and the soft sediment under the influence of S. alveolata (associated sediment). Using consumer community isotopic biplots (biomass-weighted), niche metrics (standard ellipse area), and mixing models, we found that S. alveolata, through the physical structure it creates, the stimulation of basal resources (microphytobenthos and Ulva), and the diversification of suspension-feeding species, promotes benthic-pelagic coupling and a habitat-wide form of ‘gardening,’ which further leads to trophic pathway diversification and limits trophic competition between the engineer species and associated suspension-feeders. Furthermore, our results help to refine the definition of S. alveolata reefs as the sum of the engineered and associated sediments since they are part of a single reef food web coupled by the stimulated basal resources and consumers. Finally, the non-trophic and trophic interactions mediated by S. alveolata and the associated macrofauna seem to promote the establishment of a temporally stable and probably highly resilient reef habitat.
Published: 2021

26. Ontogeny of non-muscular brachial articulations in Balanocrininae (Echinodermata, Crinoidea): iterative trajectories or phylogenetic significance?

Author: Marc Eléaume, Nadia Améziane, Michel Roux, Station de Biologie Marine de Concarneau, Direction générale déléguée à la Recherche, à l’Expertise, à la Valorisation et à l’Enseignement-Formation (DGD.REVE), Muséum national d'Histoire naturelle (MNHN)-Muséum national d'Histoire naturelle (MNHN), Institut de Systématique, Evolution, Biodiversité (ISYEB ), Muséum national d'Histoire naturelle (MNHN)-École pratique des hautes études (EPHE), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA)
Subjects: 0106 biological sciences, biology, Phylogenetic tree, Ontogeny, [SDV]Life Sciences [q-bio], 010607 zoology, Crinoid, biology.organism_classification, 010603 evolutionary biology, 01 natural sciences, Isocrinida, Symplesiomorphy, Genus, Evolutionary biology, [SDE]Environmental Sciences, Animal Science and Zoology, Neoteny, Heterochrony, ComputingMilieux_MISCELLANEOUS, Developmental Biology
Abstract: Ontogeny of non-muscular brachial articulations in extant species of Balanocrininae, i.e., Neocrinus decorus, Neocrinus blakei and Hypalocrinus naresianus (Crinoidea, Isocrinida), is described using SEM observations. All three species share embayed synarthries and symplexies (previously only known in crinoid stalks) showing a radiating crenularium pattern in their proximal arms but differ in several important ways. Neocrinus decorus has a shallow simple symmorphy affecting symplexies, and embayed synarthries. During the latest ontogeny of embayed synarthries, irregular syzygial ridges appear on the aboral segment of the fulcral ridge. Neocrinus blakei and H. naresianus share a peculiar sharp deep symmorphy superimposed on symplexies, and synarthries with a more complete single fulcral ridge that only appears late in ontogeny. Comparison with other crinoid taxa that have more advanced arm axial synarthries shows that this ontogenetic trajectory is restricted to paedomorphic stages in extant balanocrinins. An embayed synarthry seems to be derived from the earliest developmental stage of the radiating symplexial crenularium via hypermorphosis of a single crenula. An embayed synarthry is, therefore, a symplesiomorphy based on paedomorphic stage of development; it thus lacks phylogenetic significance, and should be abandoned as a major character in the classification of Isocrinida. The most advanced brachial synarthries shared by distant crinoid taxa mainly represent a homoplasy under morphofunctional constraints. However, they could result from different ontogenetic trajectories, which have only rarely been investigated. Another distinctive articulation feature, the peculiar sharp deep symmorphy observed in extant balanocrinins is a derived character known in a few fossil isocrinids beginning in the Middle Jurassic. We question its phylogenetic significance and suggest that it has developed repeatedly via iterative evolution in Isocrinida. Therefore, because these three extant balanocrinin species share the same ontogenetic trajectories of arm and stalk ligamentary articulations, and differ only in various states of heterochronic development of a few characters, we treat them as belonging to the same genus. We, therefore, consider Hypalocrinus as a junior synonym of the genus Neocrinus.
Published: 2021

27. Combined COI barcode-based methods to avoid mislabelling of threatened species of deep-sea skates

Author: Alessia Cariani, Alice Ferrari, Laura Carugati, Valentina Crobe, M. L. Geraci, S. P. Iglesias, Fausto Tinti, Rita Cannas, Al Cau, Paola Pesci, Maria Cristina Follesa, Riccardo Melis, L. Carugati, R. Melis, A. Cariani, A. Cau, V. Crobe, A. Ferrari, M. C. Follesa, M. L. Geraci, S. P. Iglésias, P. Pesci, F. Tinti, R. Cannas, Carugati L., Melis R., Cariani A., Cau A., Crobe V., Ferrari A., Follesa M.C., Geraci M.L., Iglesias S.P., Pesci P., Tinti F., Cannas R., Universita degli Studi di Cagliari [Cagliari], Alma Mater Studiorum Università di Bologna [Bologna] (UNIBO), Institute for Biological Resources and Marine Biotechnology (IRBIM), Institut de Systématique, Evolution, Biodiversité (ISYEB ), Muséum national d'Histoire naturelle (MNHN)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA), Station de Biologie Marine de Concarneau, Direction générale déléguée à la Recherche, à l’Expertise, à la Valorisation et à l’Enseignement-Formation (DGD.REVE), and Muséum national d'Histoire naturelle (MNHN)-Muséum national d'Histoire naturelle (MNHN)
Subjects: 0106 biological sciences, Dipturu, [SDV]Life Sciences [q-bio], species identification, Dipturus, Biology, Barcode, 010603 evolutionary biology, 01 natural sciences, DNA barcoding, Deep sea, law.invention, 03 medical and health sciences, law, Species identification, 14. Life underwater, specimen assignment, 030304 developmental biology, Nature and Landscape Conservation, 0303 health sciences, Ecology, skates, skate, conservation, 15. Life on land, biology.organism_classification, Fishery, species delimitation, deep sea, Threatened species
Abstract: International audience; Skates are characterised by conservative body morphology which hampers identification and leads to frequent taxonomic confusion and market mislabelling. Accurate specimen classification is crucial for reliable stock assessments and effective conservation plans, otherwise the risk of extinction could be unnoticed. The misclassification issue is evident for the genus Dipturus, distributed worldwide, from the continental shelf and slope to the deep sea. In this study, barcode cytochrome oxidase I gene (COI) sequences were used along with species delimitation and specimen assignment methods to improve taxonomy and zoogeography of species of conservation interest inhabiting the Atlantic Ocean and Mediterranean Sea. In this study, we provided new evidence of the occurence of D. nidarosiensis in the Central-Western Mediterranean Sea and the lack of Atlantic-Mediterranean genetic divergence. The Atlantic endangered species D. laevis and D. batis clustered together under the same molecular operational taxonomic unit (MOTU) with any delimitation methods used, while the assignment approach correctly discriminated specimens into the two species. These results provided evidence that the presence of the barcode gap is not an essential predictor of identification success, but the use of different approaches is crucially needed for specimen classification, especially when threshold-or tree-based methods result less powerful. The analyses also showed how different putative, vulnerable, species dwelling across SouthWestern Atlantic and SouthEastern Pacific are frequently misidentified in public sequence repositories. Our study emphasised the limits associated to public databases, highlighting the urgency to verify and implement the information deposited therein in order to guarantee accurate species identification and thus effective conservation measures for deep-sea skates.
Published: 2021

28. French ichthyological records for 2018

Author: Iglesias, Samuel P., Bergot, P., Breton, P., Brunelle, S., Camusat, M., Causse, R., Charbonnel, É., Chevaldonne, P., Cordier, Y, Cosquer, P., Cuillandre, J. P., Curd, A., Dubas, R., Duhau, M., Derrien-Courtel, S., Devique, G., Dixneuf, S., Duhamel, E., Farque, P. A., Francour, P., Fontana, Y., Gamon, A., Gicqueau, C., Goascoz, N., Hassani, S., Jadaud, A., Kopp, D., Lamour, L., Le Bris, S., Lévèque, L., Liger, P., Lorance, P., Louisy, Patrick, Maran, V., Mehault, Sonia, Metral, L., Morin-Repinçay, A., Mouchel, O., Pere, A., Quéro, J.C., Renoult, Julien P., Roche, F., Schweyer, L., Spitz, Jérôme, Thiriet, P., Thomas, W., Institut méditerranéen de biodiversité et d'écologie marine et continentale (IMBE), Avignon Université (AU)-Aix Marseille Université (AMU)-Institut de recherche pour le développement [IRD] : UMR237-Centre National de la Recherche Scientifique (CNRS), Centre d'Études Biologiques de Chizé - UMR 7372 (CEBC), Université de La Rochelle (ULR)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Institut de Systématique, Evolution, Biodiversité (ISYEB ), Muséum national d'Histoire naturelle (MNHN)-École Pratique des Hautes Études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA), Pêcheur de Bretagne, Quimper, Station de Biologie Marine de Concarneau, Direction générale déléguée à la Recherche, à l’Expertise, à la Valorisation et à l’Enseignement-Formation (DGD.REVE), Muséum national d'Histoire naturelle (MNHN)-Muséum national d'Histoire naturelle (MNHN), 96 avenue de la Méditerranée, 34110 frontignan, Station biologique de Roscoff (SBR), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Fédération de recherche de Roscoff (FR2424), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Musée National d'Histoire Naturelle de Luxembourg (MNHN), Parc Marin de la Côte Bleue, Brigade de gendarmerie maritime P 607, Dieppe, DDTM 85/DML/SRAMP/ULAM, Les Sables-d’Olonne cedex, AGLIA, Rohefort, DYNECO-LEBCO, Centre de Brest, Plouzané, ECOCEAN Inc., ECOCEAN, 5 avenue des fleurs, 93170 Bagnolet, france, Station Marine de Dinard, MNHN, France, Parc naturel marin d’Iroise (PNM Iroise), Office français de la biodiversité (OFB), Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER), Sinay, Caen, France, ECOMERSFRE 3729, Univ. Côte d’Azur, CNRS, Nice, France, 1374 vieux Chemin de hyères, 83130 la garde, Océanopolis [Brest], FROM Sud-Ouest, La Rochelle, 9 résidence lopofa, 13009 Marseille, France, Palana environnement, Aix-en-Provence, france, Association Peau-Bleue [Agde, France], Inventaire DORIS [Lyon, France], Laboratoire de Technologie et Biologie halieutiques [IFREMER, Lorient, FR], Laboratoire Halieutique Méditerranée [IFREMER, Sète, FR], Laboratoire d’Adaptation, Reproduction, et Nutrition des Poissons [IFREMER, Plouzané, FR], Comité régional des Pêches Maritimes et des elevages Marins de Corse [Bastia, FR), Société des sciences naturelles de la Charente-Maritime (SSNCM), Musée de France, Centre d’Ecologie Fonctionnelle et Evolutive (CEFE), Université Paul-Valéry - Montpellier 3 (UPVM)-École Pratique des Hautes Études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud])-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut Agro Montpellier, Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Université de Montpellier (UM), Ouessant Subaqua [ouessant, FR], La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), and MNHN – Station Marine de dinard [FR]
Subjects: Expansion, First record, [SDE]Environmental Sciences, distribution, Fishes, Northeastern Atlantic, Mediterranean, New record
Abstract: International audience; Uncommon records of fishes may evidence local or global changes in fish composition resulting from environmental change or anthropogenic activities. Significant records of uncommon marine fishes, including migrant, non-native, cryptic, rare and threatened species, collected in French waters or by French vessels in European waters, observed by scuba divers or beachgoers, are reported for the year 2018. They include first, new, rare and unusual records for the following 52 species: Hexanchus griseus, Squatina squatina, Gymnura altavela, Acipenser sturio, A. gueldenstaedtii, Dalophis imberbis, Nemichthys curvirostris, Eurypharynx pelecanoides, Maulisia mauli, M. microlepis, Sagamichthys schnakenbecki, Melanostomias bartonbeani, Astronesthes niger*, Leptostomias gladiator*, Chlorophthalmus agassizi, Magnisudis atlantica, Evermannella balbo, Regalecus glesne, Luvarus imperialis, Raniceps raninus, Fistularia cf. petimba*, Trigla lyra, Lepidotrigla dieuzeidei, Micrenophrys lilljeborgii, Howella atlantica*, Pomatomus saltatrix, Serranus cabrilla, Caranx crysos, Seriola rivoliana, Trachinotus ovatus, Lobotes surinamensis, Sarpa salpa, Chelon ramada, Pseudoscopelus altipinnis*, Trachinus draco, Parablennius pilicornis, P. ruber, Buenia affinis, B. jeffreysii, Chromogobius zebratus, Didogobius splechtnai, Gammogobius steinitzi, Gobius couchi, G. kolombatovici, Lebetus sp., Speleogobius trigloides, Thorogobius macrolepis, Vanneaugobius dollfusi, Siganus rivulatus*, Lepidocybium flavobrunneum, Hyperoglyphe sp. et Pegusa cf. nasuta, among which six, marked with an asterisk (*), represent additions to the Checklist of the marine fishes from metropolitan France and one, N. curvirostris, is a first record for the Mediterranean.
Published: 2020

29. Seawater copper content controls biofilm bioaccumulation and microbial community on microplastics

Author: Fiard, Maud, CUNY, Philippe, Sylvi, Léa, Hubas, Cédric, Jézéquel, Ronan, Lamy, Dominique, Walcker, Romain, El Houssainy, Amonda, Heimbürger-Boavida, Lars-Eric, Robinet, Tony, Bihannic, Isabelle, Gilbert, Franck, Michaud, Emma, Dirberg, Guillaume, Militon, Cécile, Departments of Physics, Molecular and Cellular Biology, and College of Optical Sciences, University of Arizona, Tucson, Departments of Physics, Molecular and Cellular Biology, and College of Optical Sciences, Institut méditerranéen d'océanologie (MIO), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Matériaux Polymères Interfaces Environnement Marin - EA 4323 (MAPIEM), Université de Toulon (UTLN), Centre européen de recherche et d'enseignement des géosciences de l'environnement (CEREGE), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Biologie des Organismes et Ecosystèmes Aquatiques (BOREA), Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Sorbonne Université (SU)-Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU), Station de Biologie Marine de Concarneau, Direction générale déléguée à la Recherche, à l’Expertise, à la Valorisation et à l’Enseignement-Formation (DGD.REVE), Muséum national d'Histoire naturelle (MNHN)-Muséum national d'Histoire naturelle (MNHN), Centre de documentation de recherche et d'expérimentations sur les pollutions accidentelles des eaux (Cedre), Cedre, Institut d'écologie et des sciences de l'environnement de Paris (iEES Paris ), Institut de Recherche pour le Développement (IRD)-Sorbonne Université (SU)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Laboratoire Ecologie Fonctionnelle et Environnement (ECOLAB), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut Ecologie et Environnement (INEE), Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS), Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR), Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM), and Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Environmental Engineering, Biofilm, Microbiota, Microplastics, Bioaccumulation, Pollution, Bioconcentration, Microbial community composition, [CHIM.ANAL]Chemical Sciences/Analytical chemistry, Biofilms, Environmental Chemistry, Seawater, [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces, environment, Plastics, Waste Management and Disposal, Copper, Water Pollutants, Chemical
Abstract: International audience; The adsorption of trace metals on microplastics (MPs) is affected by the presence of surficial biofilms but their interactions are poorly understood. Here, we present the influence of Cu levels in real seawater (Toulon Bay, NW Mediterranean Sea) on microbial communities and Cu content of the resulting biofilms grown during incubation experiments on high density polyethylene. Two sets of incubation experiments were run with seawater supplied with MPs, sampled in two sites with contrasting Cu levels: Pt12 (most contaminated site) and Pt41P (less contaminated site). For each incubation experiment, 5 treatments were considered differing in Cu concentrations, ranging between 30 and 400 nM and between 6 and 60 nM, for Pt12 and Pt41p, respectively. A control experiment (filtered at 0.2 μm) was run in parallel for each incubation experiment. We observed that, at the time scale of the incubation period, both prokaryotic and eukaryotic richness and diversity were higher in the biofilms formed from the most contaminated site. In addition, we showed that Cu levels are shaping biofilm communities, evidencing co-occurrence patterns between prokaryotes and eukaryotes with diatoms playing a central role. These differences in biofilm formation were reflected in the amount of bioaccumulated Cu per dry weight of MPs, exhibiting higher values in the most contaminated site. Within this site, the increase of Cu seawater content enhanced its bioaccumulation onto MPs until reaching saturation. This study strongly suggests a striking link between seawater copper content, biofilm community shaping and the resulting Cu bioaccumulation onto MPs.
Published: 2022

30. Physical properties of epilithic river biofilm as a new lead to perform pollution bioassessments in overseas territories

Author: Estelle Lefrancois, Alexandra Jestin, Cédric Hubas, Jean-Louis Mansot, Théo Risser, Pascal-Jean Lopez, Hélène Budzinski, Dominique Monti, Laurence Romana, Philippe Keith, Olivier Gros, Béatrice Lauga, Xavier Lourenço, Nathalie Tapie, Alexandre Haouisée, Farid Begarin, Biologie des Organismes et Ecosystèmes Aquatiques (BOREA), Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Sorbonne Université (SU)-Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU), Institut de Systématique, Evolution, Biodiversité (ISYEB ), Muséum national d'Histoire naturelle (MNHN)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA), Station de Biologie Marine de Concarneau, Direction générale déléguée à la Recherche, à l’Expertise, à la Valorisation et à l’Enseignement-Formation (DGD.REVE), Muséum national d'Histoire naturelle (MNHN)-Muséum national d'Histoire naturelle (MNHN), Centre Commun de Caractérisation des Matériaux des Antilles et de la Guyane (C3MAG), Université des Antilles (UA), Groupe de Technologie des Surfaces et Interfaces (GTSI), ECO in-EAU, Fonctionnement agroécologique et performances des systèmes de cultures horticoles (UPR HORTSYS), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad), Environnements et Paléoenvironnements OCéaniques (EPOC), Observatoire aquitain des sciences de l'univers (OASU), Université Sciences et Technologies - Bordeaux 1-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Université de Pau et des Pays de l'Adour (UPPA), Institut des sciences analytiques et de physico-chimie pour l'environnement et les materiaux (IPREM), Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Pau et des Pays de l'Adour (UPPA), Centre National de la Recherche Scientifique (CNRS), Muséum national d'Histoire naturelle (MNHN), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA), Muséum national d'Histoire naturelle (MNHN)-École Pratique des Hautes Études (EPHE), Groupe de Technologie des Surfaces et Interfaces [URp2_2] (GTSI), Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-École Pratique des Hautes Études (EPHE), Université de Pau et des Pays de l'Adour (UPPA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), and ANR-16-IDEX-0002,E2S,E2S(2016)
Subjects: 0106 biological sciences, 0301 basic medicine, Pollution, Science, media_common.quotation_subject, 030106 microbiology, 01 natural sciences, Freshwater ecosystem, Article, Environmental impact, 03 medical and health sciences, Lead (geology), Environmental impact assessment, 14. Life underwater, Environmental quality, media_common, Multidisciplinary, Ecology, 010604 marine biology & hydrobiology, Biofilm, 15. Life on land, Contamination, Tropical ecology, 13. Climate action, [SDE]Environmental Sciences, Medicine, Environmental science
Abstract: International audience; Chlordecone (CLD) levels measured in the rivers of the French West Indies were among the highest values detected worldwide in freshwater ecosystems, and its contamination is recognised as a severe health, environmental, agricultural, economic, and social issue. In these tropical volcanic islands, rivers show strong originalities as simplified food webs, or numerous amphidromous migrating species, making the bioindication of contaminations a difficult issue. The objective of this study was to search for biological responses to CLD pollution in a spatially fixed and long-lasting component of the rivers in the West Indies: the epilithic biofilm. Physical properties were investigated through complementary analyses: friction, viscosity as well as surface adhesion were analyzed and coupled with measures of biofilm carbon content and exopolymeric substance (EPS) production. Our results have pointed out a mesoscale chemical and physical reactivity of the biofilm that can be correlated with CLD contamination. We were able to demonstrate that epilithic biofilm physical properties can effectively be used to infer freshwater environmental quality of French Antilles rivers. The friction coefficient is reactive to contamination and well correlated to carbon content and EPS production. Monitoring biofilm physical properties could offer many advantages to potential users in terms of effectiveness and ease of use, rather than more complex or time-consuming analyses. Out of the 11,435 French water bodies analysed for quality compliance according to regulations imposed by European legislation, 10% are located between the tropics and the equator, thousands of kilometres away from European shores 1. In the outermost tropical territories, climatic characteristics often result in highly turbulent tropical streams 2 that support simplified ecosystems with very few primary producers. Due to high river flow, perennial phytoplankton, zooplankton and macroalgae are scarce or missing and the epilithic biofilm deserves here, even more than elsewhere, the comparison with a real productive and contributive "microbial skin" 3. The epilithic biofilm is the only endogenous long-lasting primary producer that grows on submersed river stones and is largely exploited as a food source by all diadromous fish or crustaceans 4,5. In these countries, the simplified food webs and the massive flows of post-larvae and juveniles regularly re-entering the rivers and migrating
Published: 2020

31. Food sources, digestive efficiency and resource allocation in the sea cucumber Holothuria forskali (Echinodermata: Holothuroidea): Insights from pigments and fatty acids

Author: Hélène Laguerre, Gwen Herault, Cédric Hubas, Théo Bordelet, Frank David, Nadia Ameziane, Aicha Badou, Biologie des Organismes et Ecosystèmes Aquatiques (BOREA), Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Sorbonne Université (SU)-Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU), Institut Universitaire Européen de la Mer (IUEM), Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Biotechnologie et Chimie Marine (LBCM), Laboratoire de Biotechnologie et Chimie Marines (LBCM), Université de Bretagne Sud (UBS)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM), Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM), Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Station de Biologie Marine de Concarneau, Direction générale déléguée à la Recherche, à l’Expertise, à la Valorisation et à l’Enseignement-Formation (DGD.REVE), Muséum national d'Histoire naturelle (MNHN)-Muséum national d'Histoire naturelle (MNHN), Institut de Systématique, Evolution, Biodiversité (ISYEB ), Muséum national d'Histoire naturelle (MNHN)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA), Muséum national d'Histoire naturelle (MNHN), and Muséum national d'Histoire naturelle (MNHN)-École Pratique des Hautes Études (EPHE)
Subjects: 0106 biological sciences, 0303 health sciences, Holothuria forskali, biology, 010604 marine biology & hydrobiology, Aquatic Science, biology.organism_classification, 01 natural sciences, 03 medical and health sciences, Sea cucumber, Botany, [SDE]Environmental Sciences, Resource allocation, 14. Life underwater, 030304 developmental biology
Abstract: International audience; Various research projects in Europe and North Africa have recently intended to breed temperate holothurians to alleviate fishing pressure on natural populations. However, to date little is known about the nutritional requirements of East Atlantic and Mediterranean species. In this study, we propose a “natural population”‐oriented approach to characterize food sources, digestive efficiency and resources allocation based on the composition of pigments and fatty acids (FA) in gut contents and tissues (muscles, gonads and digestive tract walls) of wild individuals of the species Holothuria (Panningothuria) forskali (Delle Chiaje, 1823) sampled in Brittany (France). Our study reveals that neither green nor red algae enter the diet of H. forskali in spring and that the only fresh vegetal material found in gut contents is brown algae (very likely diatoms). The high nutritional quality of gut contents however contrasts with the detrital nature of the ingested food sources, suggesting that a trophic upgrading of organic matter occurs before digestion. In addition, unusual FA (i.e. only present in a few groups of living species) such as long‐chain monounsaturated FA (especially the FA 23:1ω9) were found in large proportions in muscles and gonad and their effect on sea cucumber fitness needs further investigation.
Published: 2020

32. Morphological and phylogenetic data do not support the split of Alexandrium into four genera

Author: Kenneth Neil Mertens, António J. Calado, Anke Kremp, Santiago Fraga, Raffaele Siano, Albert Reñé, Takeo Horiguchi, Po Teen Lim, Shauna A. Murray, Michael L. Brosnahan, Yoshihito Takano, Isabel Bravo, Marina Montresor, Lincoln MacKenzie, Aika Yamaguchi, Cecilia Teodora Satta, Nagore Sampedro, Masao Adachi, Esther Garcés, Nicolas Chomérat, Philipp Hess, Uwe John, Kazumi Matsuoka, Estelle Masseret, Hyeon Ho Shin, Kirsty F. Smith, Jacob Larsen, Mona Hoppenrath, Haifeng Gu, Wayne Litaker, Christopher J. S. Bolch, Ismael Gárate-Lizárraga, Tatiana Yu. Orlova, Karen A. Steidinger, Mitsunori Iwataki, Gustaaf M. Hallegraeff, Malte Elbrächter, Tomohiro Nishimura, Elisabeth Nézan, Donald M. Anderson, M. Consuelo Carbonell-Moore, Christine J. Band-Schmidt, Rosa Isabel Figueroa, Satoshi Nagai, Zhun Li, Yuri B. Okolodkov, Urban Tillmann, Chui Pin Leaw, Øjvind Moestrup, Jennifer L. Wolny, National Oceanic and Atmospheric Administration (US), Ministerio de Ciencia, Innovación y Universidades (España), Agencia Estatal de Investigación (España), Station de Biologie Marine de Concarneau, Direction générale déléguée à la Recherche, à l’Expertise, à la Valorisation et à l’Enseignement-Formation (DGD.REVE), Muséum national d'Histoire naturelle (MNHN)-Muséum national d'Histoire naturelle (MNHN), Institute for Marine and Antarctic Studies [Horbat] (IMAS), University of Tasmania [Hobart, Australia] (UTAS), German Centre for Marine Biodiversity Research [Wilhelmshaven, Allemagne] (DZMB), Senckenberg am Meer, The University of Tokyo (UTokyo), Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung (AWI), Finnish Environment Institute (SYKE), MARine Biodiversity Exploitation and Conservation (UMR MARBEC), Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut de Recherche pour le Développement (IRD), Dynamiques de l'Environnement Côtier (DYNECO), Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER), Kochi University, Plant Functional Biology and Climate Change Cluster (C3), University of Technology Sydney (UTS), Institute for Marine and Antarctic Studies [Hobart] (IMAS), Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Ecologie Pélagique (PELAGOS), Dynamiques des Écosystèmes Côtiers (DYNECO), and Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)
Subjects: 0106 biological sciences, Paraphyly, Autapomorphy, Medio Marino y Protección Ambiental, [SDE.MCG]Environmental Sciences/Global Changes, Plant Science, 010501 environmental sciences, Aquatic Science, Biology, 01 natural sciences, Monophyly, Genus, Polyphyly, Centro Oceanográfico de Vigo, Paraphyletic, Harmful algal blooms, Phylogeny, 0105 earth and related environmental sciences, Taxonomy, 010604 marine biology & hydrobiology, Marine Biology & Hydrobiology, 3. Good health, Phylogenetics, Taxon, Evolutionary biology, 05 Environmental Sciences, 06 Biological Sciences, Molecular phylogenetics, Dinoflagellida, Taxonomy (biology), [SDE.BE]Environmental Sciences/Biodiversity and Ecology, Saxitoxin, Spirolides
Abstract: 8 pages, 2 tables, A recently published study analyzed the phylogenetic relationship between the genera Centrodinium and Alexandrium, confirming an earlier publication showing the genus Alexandrium as paraphyletic. This most recent manuscript retained the genus Alexandrium, introduced a new genus Episemicolon, resurrected two genera, Gessnerium and Protogonyaulax, and stated that: “The polyphyly [sic] of Alexandrium is solved with the split into four genera”. However, these reintroduced taxa were not based on monophyletic groups. Therefore this work, if accepted, would result in replacing a single paraphyletic taxon with several non-monophyletic ones. The morphological data presented for genus characterization also do not convincingly support taxa delimitations. The combination of weak molecular phylogenetics and the lack of diagnostic traits (i.e., autapomorphies) render the applicability of the concept of limited use. The proposal to split the genus Alexandrium on the basis of our current knowledge is rejected herein. The aim here is not to present an alternative analysis and revision, but to maintain Alexandrium. A better constructed and more phylogenetically accurate revision can and should wait until more complete evidence becomes available and there is a strong reason to revise the genus Alexandrium. The reasons are explained in detail by a review of the available molecular and morphological data for species of the genera Alexandrium and Centrodinium. In addition, cyst morphology and chemotaxonomy are discussed, and the need for integrative taxonomy is highlighted, Support to DMA from the NOAA ECOHAB program (Grant #NA15NOS4780181) is gratefully acknowledged. Support to EG, AR, NS from the COPAs project (CTM2017-86121-R) is acknowledged. IGL and CJBS are COFFA-IPN and EDI-IPN fellows, With the funding support of the ‘Severo Ochoa Centre of Excellence’ accreditation (CEX2019-000928-S), of the Spanish Research Agency (AEI)
Published: 2020

33. Laminariales host does impact lipid temperature trajectories of the fungal endophyte Paradendryphiella salina (Sutherland.)

Author: Cédric Hubas, Soizic Prado, Tarik Meziane, Marine Vallet, Najet Thiney, Muséum national d'Histoire naturelle (MNHN), Max Planck Institute for Chemical Ecology, Max-Planck-Gesellschaft, Biologie des Organismes et Ecosystèmes Aquatiques (BOREA), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA), Molécules de Communication et Adaptation des Micro-organismes (MCAM), Muséum national d'Histoire naturelle (MNHN)-Centre National de la Recherche Scientifique (CNRS), Station de Biologie Marine de Concarneau, Direction générale déléguée à la Recherche, à l’Expertise, à la Valorisation et à l’Enseignement-Formation (DGD.REVE), and Muséum national d'Histoire naturelle (MNHN)-Muséum national d'Histoire naturelle (MNHN)
Subjects: 0106 biological sciences, [SDV]Life Sciences [q-bio], [SDE.MCG]Environmental Sciences/Global Changes, Kelp, Pharmaceutical Science, Context (language use), Saccharina latissima, 01 natural sciences, fatty acids, Plant use of endophytic fungi in defense, 03 medical and health sciences, Algae, [CHIM.ANAL]Chemical Sciences/Analytical chemistry, Drug Discovery, Botany, Pharmacology, Toxicology and Pharmaceutics (miscellaneous), lcsh:QH301-705.5, ComputingMilieux_MISCELLANEOUS, 030304 developmental biology, Paradendryphiella salina, 0303 health sciences, biology, laminariales, Host (biology), 010604 marine biology & hydrobiology, biology.organism_classification, Laminaria digitata, fungal endophytes, [SDE.ES]Environmental Sciences/Environmental and Society, Salinity, lcsh:Biology (General), [SDE]Environmental Sciences, [SDE.BE]Environmental Sciences/Biodiversity and Ecology
Abstract: Kelps are colonized by a wide range of microbial symbionts. Among them, endophytic fungi remain poorly studied, but recent studies evidenced yet their high diversity and their central role in algal defense against various pathogens. Thus, studying the metabolic expressions of kelp endophytes under different conditions is important to have a better understanding of their impacts on host performance. In this context, fatty acid composition is essential to a given algae fitness and of interest to food web studies either to measure its nutritional quality or to infer about its contribution to consumers diets. In the present study, Paradendryphiella salina, a fungal endophyte was isolated from Saccharina latissima (L.) and Laminaria digitata (Hudson.) and its fatty acid composition was assessed at increasing salinity and temperature conditions. Results showed that fungal composition in terms of fatty acids displayed algal-dependent trajectories in response to temperature increase. This highlights that C18 unsaturated fatty acids are key components in the host-dependant acclimation of P. salina to salinity and temperature changes.
Published: 2020

34. Relationship between bacterial compartment and particulate organic matter (POM) in coastal systems: An assessment using fatty acids and stable isotopes

Author: Sophie Ferreira, Camilla Liénart, Laurence Costes, Pascal Conan, Tarik Meziane, Nicolas Savoye, Eric Maria, Sabrina Bichon, Karine Charlier, Cédric Hubas, Valérie David, Pierrick Barbier, Aurore Gueux, Hervé Derriennic, UMR 5805 Environnements et Paléoenvironnements Océaniques et Continentaux (EPOC), Observatoire aquitain des sciences de l'univers (OASU), Université Sciences et Technologies - Bordeaux 1-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Muséum national d'Histoire naturelle (MNHN), Biologie des Organismes et Ecosystèmes Aquatiques (BOREA), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA), Station de Biologie Marine de Concarneau, Direction générale déléguée à la Recherche, à l’Expertise, à la Valorisation et à l’Enseignement-Formation (DGD.REVE), Muséum national d'Histoire naturelle (MNHN)-Muséum national d'Histoire naturelle (MNHN), Laboratoire d'Océanographie Microbienne (LOMIC), Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire océanologique de Banyuls (OOB), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Université Sciences et Technologies - Bordeaux 1-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Observatoire océanologique de Banyuls (OOB), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Sorbonne Université (SU)-Université de Caen Normandie (UNICAEN), and Normandie Université (NU)-Normandie Université (NU)
Subjects: 0106 biological sciences, 010504 meteorology & atmospheric sciences, [SDV]Life Sciences [q-bio], Aquatic Science, Oceanography, French littoral, 01 natural sciences, Mixing models, Organic matter, 14. Life underwater, Fatty acids, POM dynamic, ComputingMilieux_MISCELLANEOUS, 0105 earth and related environmental sciences, chemistry.chemical_classification, [SDV.EE]Life Sciences [q-bio]/Ecology, environment, Biomass (ecology), Primary producers, δ13C, Bacteria, 010604 marine biology & hydrobiology, δ15N, 15. Life on land, 6. Clean water, Food web, chemistry, 13. Climate action, Benthic zone, Environmental chemistry, Environmental science, [SDE.BE]Environmental Sciences/Biodiversity and Ecology, Surface water
Abstract: International audience; Particulate organic matter (POM) in coastal systems is a mixture of different organic matter (OM) sources originating from land and sea. Among sources, bacterial biomass plays a large role in OM processing and carbon recycling in the ocean and is often neglected as a source in common approaches. The present study proposes to use elemental and isotopic ratio of carbon and nitrogen (C:N, δ13C, δ15N) and fatty acids to investigate the relationship between bacteria and surface water POM composition of three systems with different characteristics (two marine and one estuarine) over an annual cycle. Overall, our results highlight a positive relationship between bacterial contribution and continental degraded or undergoing degradation POM for all the studied systems and an inverse relationship with pelagic primary producers. At multisystem scale, high bacterial contribution is linked to high proportion of refractory terrestrial material characterizing estuarine stations whereas in marine systems, the occurrence of bacteria is mainly linked to river POM. Over the annual cycle, bacterial markers are more abundant during the winter period characterized by larger river and/or benthic POM contribution. This seasonal pattern is mainly driven by changes in river flows and resuspension. This study highlights the importance of bacterial compartment as a component of coastal and estuarine POM. Even though these results remains semi-quantitative, similar studies in other types of systems can help to understand microbial role in OM dynamic and to better estimate bacterial source in carbon budgets and food web studies.
Published: 2020

35. Influence of the physiological condition of bivalve recruits on their post-settlement dispersal potential

Author: Jean-Bruno Nadalini, Philippe Miner, Frédéric Olivier, Réjean Tremblay, Martin Forêt, Gesche Winkler, Biologie des Organismes et Ecosystèmes Aquatiques (BOREA), Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Sorbonne Université (SU)-Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU), Université du Québec à Rimouski (UQAR), Station de Biologie Marine de Concarneau, Direction générale déléguée à la Recherche, à l’Expertise, à la Valorisation et à l’Enseignement-Formation (DGD.REVE), Muséum national d'Histoire naturelle (MNHN)-Muséum national d'Histoire naturelle (MNHN), Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR), Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM), and Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)
Subjects: 0106 biological sciences, [SDU.OCEAN]Sciences of the Universe [physics]/Ocean, Atmosphere, [SDV.EE]Life Sciences [q-bio]/Ecology, environment, Behavior, Ecology, Physiology, 010604 marine biology & hydrobiology, Physiological condition, [SDE.MCG]Environmental Sciences/Global Changes, Bivalve recruits, 04 agricultural and veterinary sciences, Venus verrucosa, Aquatic Science, Biology, 01 natural sciences, 040102 fisheries, 0401 agriculture, forestry, and fisheries, Biological dispersal, Secondary migrations, [SDE.BE]Environmental Sciences/Biodiversity and Ecology, Post settlement, Ecology, Evolution, Behavior and Systematics, Energetic reserves
Abstract: Secondary dispersal (= migration) of bivalves occurs after metamorphosis and is a key recruitment process that can radically change patterns of primary settlement. An example of secondary dispersal is active migration behavior of bivalve recruits such as in bysso-pelagic drift. We hypothesize that these active migrations represent an energy cost for recruits and that the ability to actively migrate will depend upon the recruit’s physiological profile (quantity and quality of energy reserves). In lab experiments, we hatched 4 batches of recruits ofVenus verrucosawith different physiological profiles by varying rearing temperature and diet composition. We then introduced these recruits into a fall velocity tube (5 m height) to estimate their vertical fall velocity as a proxy of their dispersal potential: slower fall velocity implies enhanced dispersal potential. We also compared alive vs. passive (dead) recruits to assess behavioral differences. Fall velocity increased logarithmically with recruit volume for each treatment, and no differences between active and passive individuals were observed for batches reared at 20°C with a mixture ofTisochrysis luteaandChaetoceros gracilis. By contrast, active recruits in 2 other treatments (T. luteaat 20°C and a mix ofC. gracilisandT. luteaat 15°C) significantly decreased their fall velocity regardless of their volume. Moreover, the ability of recruits to control their fall velocity by their behavior was correlated with triglyceride content. Recruits with the highest energy reserves had the greatest capacity to decrease their fall velocity, which suggests a major role of physiological conditions on potential secondary dispersal. We also used a benthic flume to test the substrate selection ability of recruits depending on their physiological profile and found no differences between physiologically different batches. However,V. verrucosarecruits preferred fine sediments, unlike adults, which live mainly in coarse sediment habitats; such difference in substrate preference suggests potential secondary migrations between nursery and adult areas.
Published: 2020

36. Effect of Light Intensity and Light Quality on Diatom Behavioral and Physiological Photoprotection

Author: Prins, Antoine, Déléris, Paul, Hubas, Cédric, Jesus, Bruno, Mer, molécules et santé EA 2160 (MMS), Le Mans Université (UM)-Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), Université de Nantes (UN)-Université de Nantes (UN)-Université de Nantes - UFR des Sciences Pharmaceutiques et Biologiques, Université de Nantes (UN)-Université de Nantes (UN), Biologie des Organismes et Ecosystèmes Aquatiques (BOREA), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA), Muséum national d'Histoire naturelle (MNHN), Station de Biologie Marine de Concarneau, Direction générale déléguée à la Recherche, à l’Expertise, à la Valorisation et à l’Enseignement-Formation (DGD.REVE), Muséum national d'Histoire naturelle (MNHN)-Muséum national d'Histoire naturelle (MNHN), Institut Des Substances et Organismes de la Mer - UR 2160 (ISOMER), Nantes Université - UFR des Sciences Pharmaceutiques et Biologiques (Nantes Univ - UFR Pharmacie), Nantes Université - pôle Santé, Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ)-Nantes Université - pôle Santé, Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ)-Nantes université - UFR des Sciences et des Techniques (Nantes univ - UFR ST), Nantes Université - pôle Sciences et technologie, Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ)-Nantes Université - pôle Sciences et technologie, and Nantes Université (Nantes Univ)
Subjects: photoprotection, PAM, [SDV.BV]Life Sciences [q-bio]/Vegetal Biology, fluorescence, [SDV.BC]Life Sciences [q-bio]/Cellular Biology, migration, [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography, diatoms
Abstract: International audience; In this study, we investigated the different photoregulation responses of diatom dominated natural biofilms to different light intensities and wavelengths, over a tidal cycle in the laboratory. We compared the overall effect of light spectral quality from its light absorption (Qphar) dependent effect. Two different conditions were compared to study photoprotective strategies: sediment (migrational) and without sediment (non-migrational). Three different colors (blue, green, and red) and two light intensities (low light, LL at 210 µmol.photons.m −2 .s −1 and high light, HL at 800 µmol.photons.m −2 .s −1) showed strong interactions in inducing behavioral and physiological photoprotection. Non-migrational biofilm non-photochemical quenching (NPQ) was much more reactive to blue HL than red HL while it did not differ in LL. We observed a biphasic NPQ response with a light threshold between 200 and 250 µmol.photons.m −2 .s −1 of Qphar that elicited the onset of physiological photoprotection. Similar HL differences were not observed in migrational biofilms due to active vertical migration movements that compensated light saturating effects. Our results showed that within migrational biofilms there was an interaction between light quality and light intensity on cell accumulation pattern at the sediment surface. This interaction led to inverse diatom accumulation patterns between blue and red light at the same intensity: LL (blue + 200.67%, red + 123.96%), HL (blue + 109.15%, red + 150.34%). These differences were largely related to the differential amount of light absorbed at different wavelengths and highlighted the importance of using wavelength standardized intensities. Different vertical migration patterns significantly affected the total pigment content measured at the surface, suggesting that cell could migrate downward more than 2 mm as a photoregulatory response. Colloidal carbohydrates patterns paralleled the vertical migration movements, highlighting their possible role in diatom motility. Our data strongly suggests a wavelength and Qphar dependent light stress threshold that triggers upward and downward movements to position microphytobenthic diatoms at their optimal depth.
Published: 2020

37. Ocean acidification impacts growth and shell mineralization in juvenile abalone (Haliotis tuberculata)

Author: Philippe Dubois, Stéphanie Auzoux-Bordenave, Aïcha Badou, Sylvain Huchette, Nathalie Wessel, Sabine Roussel, Solène Avignon, Sophie G. Martin, Saloua M'Zoudi, Biologie des Organismes et Ecosystèmes Aquatiques (BOREA), Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Sorbonne Université (SU)-Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU), Sorbonne Université (SU), Biogéochimie et Ecotoxicologie (IFREMER BE), Institut Français de Recherche pour l'Exploitation de la Mer - Atlantique (IFREMER Atlantique), Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER), Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER), Station de Biologie Marine de Concarneau, Direction générale déléguée à la Recherche, à l’Expertise, à la Valorisation et à l’Enseignement-Formation (DGD.REVE), Muséum national d'Histoire naturelle (MNHN)-Muséum national d'Histoire naturelle (MNHN), Adaptation et diversité en milieu marin (AD2M), Station biologique de Roscoff (SBR), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Université libre de Bruxelles (ULB), Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR), Institut Universitaire Européen de la Mer (IUEM), Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Centre National de la Recherche Scientifique (CNRS)-Université de Brest (UBO), Scea France Haliotis, This work was supported in part by the ATM program 'Biomineralization' of the MNHN funded by the Ministère délégué à l’Enseignement Supérieur et à la Recherche (Paris, France) and by the ICOBio project under the program 'Acidification des Océans' funded by the Fondation pour la Recherche sur la Biodiversité (FRB) and the Ministère de la Transition Ecologique et Solidaire (MTES). We thank Dr. Chakib Djejat and Stéphane Formosa for their assistance in scanning electron microscopy (SEM, Plateau technique de Microscopie Electronique, MNHN, Paris and Concarneau, France). The Regional Council of Brittany, the General Council of Finistère, the urban community of Concarneau Cornouaille Agglomération and the European Regional Development Fund (ERDF) are acknowledged for the funding of the Sigma 300 FE-SEM of the Concarneau Marine Station, Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA), Service Valorisation de l'Information pour la gestion Intégrée Et la Surveillance (VIGIES), Dynamiques des Écosystèmes Côtiers (DYNECO), Adaptation et diversité en milieu marin (ADMM), Institut national des sciences de l'Univers (INSU - CNRS)-Station biologique de Roscoff (SBR), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM), Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), and Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)
Subjects: 0106 biological sciences, food.ingredient, Abalone, Periostracum, growth, ocean acidification, Aquatic Science, engineering.material, Biology, 010603 evolutionary biology, 01 natural sciences, Mineralization (biology), shell mineralization, chemistry.chemical_compound, food, Aquaculture, 14. Life underwater, Haliotis, Ecology, Evolution, Behavior and Systematics, ComputingMilieux_MISCELLANEOUS, [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography, abalone, Ecology, business.industry, 010604 marine biology & hydrobiology, Aragonite, ACL, Ocean acidification, Calcium carbonate, juvenile, chemistry, 13. Climate action, Environmental chemistry, [SDE]Environmental Sciences, engineering, [SDE.BE]Environmental Sciences/Biodiversity and Ecology, business, Sciences exactes et naturelles
Abstract: International audience; Ocean acidification (OA) is a major global driver that leads to substantial changes in seawater carbonate chemistry, with potentially serious consequences for calcifying organisms. Marine shelled molluscs are ecologically and economically important species, providing essential ecosystem services and food sources for other species. Due to their physiological characteristics and their use of calcium carbonate (CaCO 3) to build their shells, molluscs are among the most vulnerable invertebrates with regard to OA, with early developmental stages being particularly sensitive to pH changes. This study investigated the effects of CO 2-induced OA on juveniles of the European abalone Haliotis tuberculata, a commercially important gastropod species. Six-month-old juvenile abalones were cultured for 3 months at four pH levels (8.1, 7.8, 7.7, 7.6) representing current and predicted near-future conditions. Survival, growth, shell microstructure, thickness, and strength were compared across the four pH treatments. After 3 months of exposure, significant reductions in juvenile shell length, weight, and strength were revealed in the pH 7.6 treatment. Scanning electron microscopy observations also revealed modified texture and porosity of the shell mineral layers as well as alterations of the periostracum at pH 7.6 which was the only treatment with an aragonite saturation state below 1. It is concluded that low pH induces both general effects on growth mechanisms and corrosion of deposited shell in H. tuberculata. This will impact both the ecological role of this species and the costs of its aquaculture.
Published: 2020

38. An Untargeted Metabolomic Approach for Microphytobenthic Biofilms in Intertidal Mudflats

Author: Gaubert-Boussarie, Julie, Prado, Soizic, Hubas, Cédric, Biologie des Organismes et Ecosystèmes Aquatiques (BOREA), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA), Molécules de Communication et Adaptation des Micro-organismes (MCAM), Muséum national d'Histoire naturelle (MNHN)-Centre National de la Recherche Scientifique (CNRS), Muséum national d'Histoire naturelle (MNHN), Station de Biologie Marine de Concarneau, Direction générale déléguée à la Recherche, à l’Expertise, à la Valorisation et à l’Enseignement-Formation (DGD.REVE), and Muséum national d'Histoire naturelle (MNHN)-Muséum national d'Histoire naturelle (MNHN)
Subjects: [SDV.EE]Life Sciences [q-bio]/Ecology, environment, lcsh:QH1-199.5, microphytobenthos, lcsh:Q, mudflats, lcsh:General. Including nature conservation, geographical distribution, biofilms, lcsh:Science, metabolomics, diatoms
Abstract: International audience; Microphytobenthic (MPB) biofilms in intertidal muddy sediments play important ecological functions in coastal ecosystems. These biofilms are mainly composed of epipelic diatoms but also prokaryotes, with a dominance of bacteria, which excrete diverse extracellular polymeric substances (EPS) according to their environment. While numerous studies have investigated the main components of these EPS matrices via traditional colorimetric assays, their fine composition, notably in specialized metabolites, is still largely unknown. A better chemical characterization of these MPB biofilms is necessary, especially regarding the numerous functions their chemical components play for microorganisms (e.g., motility, cell protection, defense mechanisms, and chemical communication), but also for coastal systems (e.g., primary production, sediment stabilization, larval settlement of some invertebrates with high economical value). An alternative approach to traditional analyses is the use of untargeted metabolomic techniques, which have not yet been applied to such MPB biofilms. The objectives of the present study were to (a) propose a protocol for metabolic fingerprinting by LC-MS and GC-MS for metabolites analysis in polar and non-polar fractions in MPB biofilms extracted from mudflat sediment and to (b) apply this protocol to a case study: the effect of light exposure on the metabolomic fingerprint of the MPB biofilm community. We compared three extraction methods using different mixes of solvents and selected a methanol/chloroform mix (1:1), which gave better results for both techniques and fractions. We then applied the selected protocol to our case study using a short-term light exposure experiment in aquaria (7 days). The present study is the first using a detailed untargeted metabolomic approach on MPB biofilms from mudflat sediment and will provide a solid baseline for further work in this area.
Published: 2020

39. Novel α-Hydroxy γ-Butenolides of Kelp Endophytes Disrupt Bacterial Cell-to-Cell Signaling

Author: Vallet, Marine, Chong, Yee-Meng, Tourneroche, Anne, Genta-Jouve, Grégory, Hubas, Cédric, Lami, Raphaël, Gachon, Claire, Klochkova, Tatyana, Chan, Kok-Gan, Prado, Soizic, Molécules de Communication et Adaptation des Micro-organismes (MCAM), Muséum national d'Histoire naturelle (MNHN)-Centre National de la Recherche Scientifique (CNRS), Max Planck Institute for Chemical Ecology, Max-Planck-Gesellschaft, University of Malaya = Universiti Malaya [Kuala Lumpur, Malaisie] (UM), Chimie Organique, Médicinale et Extractive et Toxicologie Expérimentale (COMETE - UMR 8638), Université Paris Descartes - Paris 5 (UPD5)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Biologie des Organismes et Ecosystèmes Aquatiques (BOREA), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA), Muséum national d'Histoire naturelle (MNHN), Station de Biologie Marine de Concarneau, Direction générale déléguée à la Recherche, à l’Expertise, à la Valorisation et à l’Enseignement-Formation (DGD.REVE), Muséum national d'Histoire naturelle (MNHN)-Muséum national d'Histoire naturelle (MNHN), Laboratoire de Biodiversité et Biotechnologies Microbiennes (LBBM), PIERRE FABRE-EDF (EDF)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Observatoire océanologique de Banyuls (OOB), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Scottish Association for Marine Science (SAMS), Kamchatka State Technical University, Institute of Biological Sciences, University of Malaya [Kuala Lumpur, Malaisie], Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Sorbonne Université (SU)-Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU), and Universiti Malaya
Subjects: endomicrobiota, α-hydroxy γ-butenolide, quorum quenching, quorum sensing, [SDV.BV]Life Sciences [q-bio]/Vegetal Biology, marine macrophytes, fungal endophytes, [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography, [SDV.MP.MYC]Life Sciences [q-bio]/Microbiology and Parasitology/Mycology, Paradendryphiella salina
Abstract: International audience; A wide range of microbial symbionts such as bacteria and fungi colonize the tissues of macrophytes. The chemical interactions between these endophytes remain underexplored. The obligate marine fungus Paradendryphiella salina was isolated from several healthy brown macrophyte species. Novel α-hydroxy γ-butenolides produced by P. salina were purified and characterized by nuclear magnetic resonance (NMR). These compounds interfere with the bacterial quorum sensing system as shown in bioassays with pathogenic bacterial model Pseudomonas aeruginosa. Ultra-performance liquid chromatography-high-resolution mass spectrometry (UHPLC-HRMS)-based comparative metabolomics revealed the presence of the main α-hydroxy γ-butenolides among all the P. salina strains isolated from different hosts as well as a high metabolic variability related to the alga-host species. Collectively, these findings highlight the key role of microbial chemical signaling that may occur within the algal holobiont.
Published: 2020

40. Trophic niche of the invasive gregarious species Crepidula fornicata , in relation to ontogenic changes

Author: Cédric Hubas, Thibault Androuin, Fabienne Le Grand, Gwendoline Lefebvre, Gauthier Schaal, Stanislas F. Dubois, Antoine Carlier, Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER), Biologie des Organismes et Ecosystèmes Aquatiques (BOREA), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA), Station de Biologie Marine de Concarneau, Direction générale déléguée à la Recherche, à l’Expertise, à la Valorisation et à l’Enseignement-Formation (DGD.REVE), Muséum national d'Histoire naturelle (MNHN)-Muséum national d'Histoire naturelle (MNHN), Muséum national d'Histoire naturelle (MNHN), and Université de Brest (UBO)
Subjects: 0106 biological sciences, pigments, Zoology, stable isotopes, 010603 evolutionary biology, 01 natural sciences, fatty acids, Sedimentary organic matter, Organic matter, 14. Life underwater, Crepidula, Crepidula fornicata, Trophic level, chemistry.chemical_classification, Biomass (ecology), biology, Primary producers, 010604 marine biology & hydrobiology, ontogenic shift, Bay of Brest, Pelagic zone, biology.organism_classification, trophic niche, chemistry, Benthic zone, [SDE.BE]Environmental Sciences/Biodiversity and Ecology
Abstract: PCI Recommendation : Trophic niche of the invasive gregarious species Crepidula fornicata, in relation to ontogenic changesThibault Androuin, Stanislas F. Dubois, Cédric Hubas, Gwendoline Lefebvre, Fabienne Le Grand, Gauthier Schaal, Antoine Carlier(2021), bioRxiv, 2020.07.30.229021, ver. 4 peer-reviewed and recommended by Peer Community In Ecology10.1101/2020.07.30.229021; International audience; The slipper limpet Crepidula fornicata is a common and widespread invasive gregarious species along the European coast. Among its life-history traits, well documented ontogenic changes in behavior (i.e., motile male to sessile female) suggests a potential shift in feeding strategy across its life stages. Considering the ecological significance of this species in colonized areas, understanding how conspecifics share the trophic resource is crucial. Using fatty acids (FA) and stable isotopes (SI) as complementary trophic markers, we conducted a field survey between late winter and spring to investigate the trophic niche of three ontogenic stages of C. fornicata that bear different sexual (male/female) and motility (motile/sessile) traits. Potential trophic sources were characterized by their pigment, FA and SI compositions and discriminated well over the study period. We showed that the biofilm covering C. fornicata shells harbored a higher biomass of primary producers (i.e., chlorophytes and diatoms) than the surrounding sediment surface. Over the study period, we observed a covariation between the three ontogenic stages for both FA and SI compositions which suggest that the trophic niche of C. fornicata does not change significantly across its benthic life. During periods of low food availability, slipper limpets displayed an opportunistic suspension-feeding behaviour, relying on both fresh and detrital organic matter, likely coming from superficial sedimentary organic matter. During high food availability (i.e., spring phytoplankton bloom), all ontogenic stages largely benefited from this fresh supply of organic matter (pelagic diatoms in this case). However, the three ontogenic stages showed consistent differences in FA composition, and to a lesser extent in SI composition. These differences persist over time, as they originate more likely from ontogenic physiological changes (e.g., differential growth rates, metabolic rate or gametogenesis) rather than diet discrepancies.
Published: 2020

41. Understanding Ciprofloxacin Failure in Pseudomonas aeruginosa Biofilm: Persister Cells Survive Matrix Disruption

Author: Anaïs Soares, Valérie Roussel, Martine Pestel-Caron, Magalie Barreau, François Caron, Emeline Bouffartigues, Sylvie Chevalier, Manuel Etienne, UNIROUEN - UFR Santé (UNIROUEN UFR Santé), Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Normandie Université (NU), Station de Biologie Marine de Concarneau, Direction générale déléguée à la Recherche, à l’Expertise, à la Valorisation et à l’Enseignement-Formation (DGD.REVE), Muséum national d'Histoire naturelle (MNHN)-Muséum national d'Histoire naturelle (MNHN), Groupe de Recherche sur l'Adaptation Microbienne (GRAM 2.0), Normandie Université (NU)-Normandie Université (NU)-Université de Caen Normandie (UNICAEN), Normandie Université (NU), Laboratoire de Microbiologie Signaux et Microenvironnement (LMSM), Chercheur indépendant, Service des maladies infectieuses et tropicales [Rouen], CHU Rouen, and Normandie Université (NU)-Normandie Université (NU)-Université de Rouen Normandie (UNIROUEN)
Subjects: Microbiology (medical), Multidrug tolerance, Stringent response, Population, lcsh:QR1-502, medicine.disease_cause, Microbiology, lcsh:Microbiology, Persistence, 03 medical and health sciences, Ciprofloxacin, medicine, Viability assay, education, 030304 developmental biology, 0303 health sciences, education.field_of_study, 030306 microbiology, Pseudomonas aeruginosa, Chemistry, Biofilm, Biofilm matrix, Extracellular matrix, biochemical phenomena, metabolism, and nutrition, [SDV.MP.BAC]Life Sciences [q-bio]/Microbiology and Parasitology/Bacteriology, medicine.drug
Abstract: International audience; Biofilms are commonly recalcitrant to antibiotics, through incompletely elucidated mechanisms such as tolerance and persistence. We aimed at investigating how a Pseudomonas aeruginosa biofilm escapes ciprofloxacin treatment. P. aeruginosa PA14 in vitro mature biofilms were challenged with supra-MIC ciprofloxacin concentrations. Cell viability was quantified by fluorescein diacetate assay. Population dynamics were determined by counts of surviving culturable cells. Biofilms were analyzed using confocal laser scanning microscopy (CLSM), and the expression of genes involved in stringent response, toxin-antitoxin HigB/HigA, and type 3 secretion system (T3SS) was quantified by RT-qPCR in untreated and treated biofilms. Ciprofloxacin exposure resulted in an initial reduction of bacterial counts following a biphasic time-kill curve. After 24 h of treatment, the overall cell activity and the density of culturable cells significantly decreased as compared to untreated biofilm. No resistant mutant was isolated amongthe
Published: 2019

42. Unsuspected intraspecific variability in the toxin production, growth and morphology of the dinoflagellate Alexandrium pacificum R.W. Litaker (Group IV) blooming in a South Western Mediterranean marine ecosystem, Annaba Bay (Algeria)

Author: Yves Collos, Eric Abadie, Mohamed Laabir, Imen Hadjadji, Patrick Berrebi, Zouher Amzil, Hocine Frihi, Zhao Jun Shao, Nicolas Chomérat, Estelle Masseret, Fabien Rieuvilleneuve, Jean Luc Rolland, Université Badji Mokhtar - Annaba [Annaba] (UBMA), MARine Biodiversity Exploitation and Conservation (UMR MARBEC), Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), Ecosystèmes lagunaires : organisation biologique et fonctionnement (ECOLAG), Université Montpellier 2 - Sciences et Techniques (UM2)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Centre National de la Recherche Scientifique (CNRS), Institut des Sciences de l'Evolution de Montpellier (UMR ISEM), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Montpellier (UM)-Institut de recherche pour le développement [IRD] : UR226-Centre National de la Recherche Scientifique (CNRS), Institut Français de Recherche pour l'Exploitation de la Mer - Atlantique (IFREMER Atlantique), Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER), Station de Biologie Marine de Concarneau, Direction générale déléguée à la Recherche, à l’Expertise, à la Valorisation et à l’Enseignement-Formation (DGD.REVE), Muséum national d'Histoire naturelle (MNHN)-Muséum national d'Histoire naturelle (MNHN), Interactions Hôtes-Pathogènes-Environnements (IHPE), Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Perpignan Via Domitia (UPVD), Université Badji Mokhtar Annaba (UBMA), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-École Pratique des Hautes Études (EPHE), and Université de Perpignan Via Domitia (UPVD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)
Subjects: 0106 biological sciences, Mediterranean climate, Alexandrium catenella, Zoology, Growth, Biology, Mediterranean, Toxicology, 01 natural sciences, Intraspecific competition, 03 medical and health sciences, Dominance (ecology), Shellfish Poisoning, Marine ecosystem, 14. Life underwater, [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography, Ecosystem, Toxins, Biological, 0303 health sciences, Alexandrium pacificum, 010604 marine biology & hydrobiology, 030302 biochemistry & molecular biology, Intraspecific variability, Dinoflagellate, biology.organism_classification, Toxin profile, [SDV.MP]Life Sciences [q-bio]/Microbiology and Parasitology, Bays, [SDV.TOX]Life Sciences [q-bio]/Toxicology, Algeria, Dinoflagellida, Marine Toxins, Adaptation, Bay, Water Pollutants, Chemical
Abstract: International audience; Physiological plasticity gives HABs species the ability to respond to variations in the surrounding environment. The aim of this study was to examine morphological and physiological variability in Alexandrium pacificum R.W. Litaker (Group IV) (former Alexandrium catenella) blooming in Annaba bay, Algeria. Monoclonal cultures of up to 30 strains of this neurotoxic dinoflagellate were established by the germination of single resting cysts from the surface sediment of this southern Mediterranean marine ecosystem. Ribotyping confirmed formally for the first time that A. pacificum is developing in Eastern Algerian waters. Toxin analyses of A. pacificum strains revealed substantial intraspecific variability in both the profile and toxin amount. However, the toxin profile of most strains is characterized by the dominance of GTX6 (up to 96 mol %) which is the less toxic paralytic molecule. The toxin concentrations in the isolated strains varied widely between 3.8 and 30.82 fmol cell 1. We observed an important variation in the growth rate of the studied A. pacificum strains with values ranging from 0.05 to 0.33 d 1. The lag time of the studied strains varied widely and ranged from 4 to 20 days. The intraspecific diversity could be a response to the select ion pressure which may be exerted by different environmental conditions over time and which can be genetically and in turn physiologically expressed. This study highlights, for the first time, that the sediment of a limited area holds an important diversity of A. pacificum cysts which give when germinate populations with noticeable physiological plasticity. Consequently, this diversified natural populations allow an exceptional adaptation to specific environmental conditions to outcompete local microalgae and to establish HABs whi ch could explain why this dinoflagellate is successful and expanding worldwide
Published: 2019

43. Detection of full and limited amphidromous migratory dynamics of fish in Caribbean rivers

Author: Marie Robert, Lou Frotté, Hélène Tabouret, Dominique Monti, Julien Ringelstein, Christophe Pécheyran, Nadia Améziane, Station de Biologie Marine de Concarneau, Direction générale déléguée à la Recherche, à l’Expertise, à la Valorisation et à l’Enseignement-Formation (DGD.REVE), Muséum national d'Histoire naturelle (MNHN)-Muséum national d'Histoire naturelle (MNHN), Biologie des Organismes et Ecosystèmes Aquatiques (BOREA), Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Sorbonne Université (SU)-Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU), Parc national de la Guadeloupe, Institut des sciences analytiques et de physico-chimie pour l'environnement et les materiaux (IPREM), Université de Pau et des Pays de l'Adour (UPPA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), and Office National de l’Eau et des Milieux Aquatiques
Subjects: 0106 biological sciences, [SDV]Life Sciences [q-bio], Biodiversity, barium, femtosecond LA-ICP-MS, Lesser Antille, Aquatic Science, diadromy, 010603 evolutionary biology, 01 natural sciences, Eleotridae, Sicydium plumieri, Gobiesocidae, Agonostomus monticola, 14. Life underwater, strontium, Ecology, Evolution, Behavior and Systematics, slife cycle, Fish migration, Ecology, biology, Eleotris, 010604 marine biology & hydrobiology, biology.organism_classification, Habitat, [SDE]Environmental Sciences
Abstract: International audience; All native fishes living in the Caribbean island rivers are considered diadromous but few species have been validated as diadromous. In Guadeloupe (Lesser Antilles) as well as in the other tropical islands, the riverine habitats are subject to strong anthropogenic pressure due to resource modifications or dams. The management of fish biodiversity requires knowledge concerning their life history traits and behaviour that are still unknown for most species at a local scale and at the whole distribution area of the species. In a Guadeloupe river, we inferred the migratory patterns of four freshwater fishes common to Caribbean rivers by the analysis of otolith microchemistry. We found two species Eleotris perniger (Eleotridae) and Sicydium plumieri (Gobiidae) to be completely amphidromous with a marine larval phase and a freshwater adult phase. Agonostomus monticola (Mugilidae) was also found to be amphidromous in this system. The fourth species Gobiesox cephalus (Gobiesocidae) showed elemental ratios suggesting an estuarine larval phase and was defined as “limited amphidromous”. The identification of such life history traits, with limited dispersion abilities, argues for specific management measures in tropical island rivers at a basin scale for the conservation of biodiversity.
Published: 2019

44. Characterization of diatom adhesion properties on different substrates: from population to individual scale

Author: Laviale, Martin, Allen, Joey, Hubas, Cédric, Beaussart, Audrey, El-Kirat-Chatel, Sofiane, Laboratoire Interdisciplinaire des Environnements Continentaux (LIEC), Institut Ecologie et Environnement (INEE), Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Terre et Environnement de Lorraine (OTELo), Institut national des sciences de l'Univers (INSU - CNRS)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Ecologie Fonctionnelle et Environnement (ECOLAB), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut Ecologie et Environnement (INEE), Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS), Biologie des Organismes et Ecosystèmes Aquatiques (BOREA), Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Sorbonne Université (SU)-Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU), Station de Biologie Marine de Concarneau, Direction générale déléguée à la Recherche, à l’Expertise, à la Valorisation et à l’Enseignement-Formation (DGD.REVE), Muséum national d'Histoire naturelle (MNHN)-Muséum national d'Histoire naturelle (MNHN), Laboratoire de Chimie Physique et Microbiologie pour les Matériaux et l'Environnement (LCPME), Institut de Chimie du CNRS (INC)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Ecologie Fonctionnelle et Environnement (LEFE), Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA), and Muséum national d'Histoire naturelle (MNHN)
Subjects: [SDV.EE]Life Sciences [q-bio]/Ecology, environment, [SDE.BE]Environmental Sciences/Biodiversity and Ecology
Abstract: International audience; Phototrophic biofilms are essential ecological players acting at the interface between the water column and immersed substrates. They are complex aggregates of microorganisms among which diatoms often dominate. These microalgae produce copious amount of extracellular polymeric substances (EPS) which provide a physical structure to the biofilm community (i.e. matrix), To date, little is known about the cell surface properties governing the adhesion of these organisms. Here we used atomic force microscopy (AFM) to decipher the topography and adhesive properties of the freshwater diatom Nitzschia palea at the nanoscale.
Published: 2019

45. A revision of the genus Conocrinus d'Orbigny, 1850 (Echinodermata, Crinoidea, Rhizocrinidae) and its place among extant and fossil crinoids with a xenomorphic stalk

Author: Michel Roux, Marc Eléaume, Nadia Améziane, Institut de Systématique, Evolution, Biodiversité (ISYEB ), Muséum national d'Histoire naturelle (MNHN)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA), Station de Biologie Marine de Concarneau, Direction générale déléguée à la Recherche, à l’Expertise, à la Valorisation et à l’Enseignement-Formation (DGD.REVE), and Muséum national d'Histoire naturelle (MNHN)-Muséum national d'Histoire naturelle (MNHN)
Subjects: 0106 biological sciences, Paris, [SDV]Life Sciences [q-bio], 010607 zoology, Zoology, Biology, 010603 evolutionary biology, 01 natural sciences, Extant taxon, Genus, Polyphyly, Animals, Animalia, Crinoidea, Bathycrinidae, Ecology, Evolution, Behavior and Systematics, ComputingMilieux_MISCELLANEOUS, Taxonomy, Fossils, Biodiversity, 15. Life on land, Cretaceous, Type species, Taxon, Spain, [SDE]Environmental Sciences, Comatulida, Animal Science and Zoology, Taxonomy (biology), France, D orbigny, Echinodermata
Abstract: The genus Conocrinus d’Orbigny, 1850 (Crinoidea, Bourgueticrinina) was established on the basis of two aboral cups that had previously been described as Bourgueticrinus thorenti d’Archiac, 1846. One of these (now considered lost) came from the “Rocher du Goulet” at the base of the Biarritz section (Bartonian, Cote des Basques, southwest France). D’Archiac figured only the second cup; this belongs to the d’Orbigny Collection and is still housed in the palaeontological collection of the Museum national d’Histoire naturelle (Paris) as the lectotype of the species, C. thorenti . It appears that it was collected from Priabonian levels exposed near Castellane (Alpes de Haute Provence, southeast France). New observations on this cup, as well as a detailed study of the characters of aboral cups, columnals and proximal brachials in a few extant and fossil species classically attributed to Conocrinus or to closely related genera such as Democrinus , Rhizocrinus and Tormocrinus , have yielded arguments for a revision of the taxonomy and interrelationships of extant and fossil taxa in the family Bourgueticrinidae. Conocrinus (= Tormocrinus ), as here interpreted, includes six Eocene species: C. thorenti , C. archiaci , C. cahuzaci n. sp., C. duperrieri , C. cf. suessi and C. veronensis . Numerous extinct species previously attributed to Conocrinus or Democrinus are here transferred to two new genera which first occur in the lower Paleocene: Paraconocrinus n. gen. (type species: P. pyriformis ) and Pseudoconocrinus n. gen. (type species: P. doncieuxi ). Aboral cups from the “Rocher du Goulet” (Biarritz) are here assigned to Paraconocrinus pellati n. gen., n. sp., while the Danian species Democrinus maximus is transferred to Pseudoconocrinus n. gen. A new genus, Cherbonniericrinus , is created to accommodate a single extant species, Ch. cherbonnieri , previously attributed to Conocrinus , while the extant genus Rhizocrinus , closely related to Democrinus , is resurrected. Conocrinus and closely related genera are derived from a bourgueticrinine lineage the first record of which is from the lower Campanian, with the new genus Carstenicrinus . These are all attributed to the family Rhizocrinidae which is here considered distinct from the family Bourgueticrinidae. Rhizocrinids rapidly diversified immediately after the Cretaceous-Paleogene (K/Pg) event. Cretaceous taxa previously placed within the family Bourgueticrinidae now appear to be polyphyletic. Some of them do not belong to Bourgueticrinina, such as those of the Dunnicrinus lineage. Interrelationships of Rhizocrinidae and other post-Palaeozoic families having a xenomorphic stalk are discussed.
Published: 2019

46. Coastal waters freshening and extreme seasonality affect organic matter sources, quality, and transfers in a High Arctic fjord (Young Sound, Greenland)

Author: Laurent Chauvaud, Sylvain Menneteau, Frédéric Olivier, Mikael K. Sejr, Guillaume Bridier, Tarik Meziane, Jacques Grall, Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR), Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM), Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Biologie des Organismes et Ecosystèmes Aquatiques (BOREA), Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Sorbonne Université (SU)-Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU), Institut Universitaire Européen de la Mer (IUEM), Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS), Arctic Research Centre [Aarhus] (ARC), Aarhus University [Aarhus], Department of Bioscience [Aarhus], Station de Biologie Marine de Concarneau, Direction générale déléguée à la Recherche, à l’Expertise, à la Valorisation et à l’Enseignement-Formation (DGD.REVE), Muséum national d'Histoire naturelle (MNHN)-Muséum national d'Histoire naturelle (MNHN), ANR-15-ASTR-0025,GAAP,Glace Arctique par Acoustique Passive(2015), Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Université de Caen Normandie (UNICAEN), and Normandie Université (NU)-Normandie Université (NU)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA)
Subjects: 0106 biological sciences, Mya truncata, Young Sound, Fjord, Aquatic Science, 01 natural sciences, FATTY-ACID-COMPOSITION, FOOD-WEB STRUCTURE, Sea ice, Sedimentary organic matter, Climate change, Organic matter, Ecosystem, 14. Life underwater, SPRING BLOOM, NORTHEAST GREENLAND, Fatty acids, Ecology, Evolution, Behavior and Systematics, Stable isotopes, chemistry.chemical_classification, [SDV.EE]Life Sciences [q-bio]/Ecology, environment, geography, geography.geographical_feature_category, Ecology, biology, TROPHIC MARKERS, PHYTOPLANKTON BLOOMS, Arctic ecosystems, 010604 marine biology & hydrobiology, ACL, Benthic-pelagic coupling, biology.organism_classification, ISOTOPE VALUES, Oceanography, chemistry, Arctic, 13. Climate action, Benthic zone, ANATOMICAL DISTRIBUTIONS, TEMPORAL VARIATIONS, Environmental science, [SDE.BE]Environmental Sciences/Biodiversity and Ecology, LIPID CLASSES
Abstract: International audience; Arctic benthic ecosystems are expected to experience strong modifications in the dynamics of primary producers and/or benthic-pelagic coupling under climate change. However, lack of knowledge about the influence of physical constraints (e.g. ice-melting associated gradients) on organic matter sources, quality, and transfers in systems such as fjords can impede predictions of the evolution of benthic-pelagic coupling in response to global warming. Here, sources and quality of particulate organic matter (POM) and sedimentary organic matter (SOM) were characterized along an inner-outer gradient in a High Artic fjord (Young Sound, NE Greenland) exposed to extreme seasonal and physical constraints (ice-melting associated gradients). The influence of the seasonal variability of food sources on 2 dominant filter-feeding bivalves (Astarte moerchi and Mya truncata) was also investigated. Results revealed the critical impact of long sea ice/snow cover conditions prevailing in Young Sound corresponding to a period of extremely poor and degraded POM and SOM. Freshwater inputs had a very local impact during summer, with relatively more degraded POM at the surface compared to bottom waters that were less nutritionally depleted but more heterogeneous among the sampled stations. Terrestrial inputs contributed to the SOM composition but showed a large variability along the fjord. Finally, diet analyses underlined the contrasted nutritional conditions, showing much higher lipid reserves in A. moerchi than in M. truncata during winter. Under a scenario with increased freshwater input, such results suggest a decline in organic matter quality and production in Young Sound, with subsequent impacts on benthic food webs.
Published: 2019

47. Assessing the sensitivity of marine habitats to anthropogenic pressures: a key tool in evaluating risks to Mediterranean benthic habitats

Author: Marie La Rivière, Noëmie Michez, Annabelle Aish, Denise Bellan-Santini, Gérard Bellan, Pierre Chevaldonné, Jean-Claude Dauvin, Sandrine Derrien-Courtel, Jacques Grall, Laurent Guérin, Anne-Laure Janson, Céline Labrune, Stéphane Sartoretto, Thierry Thibaut, Éric Thiébaut, Marc Verlaque, Muséum national d'Histoire naturelle (MNHN), Institut méditerranéen de biodiversité et d'écologie marine et continentale (IMBE), Centre National de la Recherche Scientifique (CNRS)-Institut de recherche pour le développement [IRD] : UMR237-Aix Marseille Université (AMU)-Avignon Université (AU), Morphodynamique Continentale et Côtière (M2C), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS), Station de Biologie Marine de Concarneau, Direction générale déléguée à la Recherche, à l’Expertise, à la Valorisation et à l’Enseignement-Formation (DGD.REVE), Muséum national d'Histoire naturelle (MNHN)-Muséum national d'Histoire naturelle (MNHN), Université de Brest (UBO), Biologie des organismes marins et écosystèmes (BOME), Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Muséum national d'Histoire naturelle (MNHN), Laboratoire d'océanographie biologique de Banyuls (LOBB), Observatoire océanologique de Banyuls (OOB), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), IFREMER - Laboratoire Provence Azur Corse, Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER), Ecosystèmes Côtiers Marins et Réponses aux Stress (ECOMERS), Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA), Institut méditerranéen d'océanologie (MIO), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Toulon (UTLN), SPA/RAC, Avignon Université (AU)-Aix Marseille Université (AMU)-Institut de recherche pour le développement [IRD] : UMR237-Centre National de la Recherche Scientifique (CNRS), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), Muséum national d'Histoire naturelle (MNHN)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Environnement Ressources Provence Azur Corse (LERPAC), LITTORAL (LITTORAL), Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER), and Université Nice Sophia Antipolis (1965 - 2019) (UNS)
Subjects: human activities, [SDE.MCG]Environmental Sciences/Global Changes, benthic habitats, [SDE.BE]Environmental Sciences/Biodiversity and Ecology, sensitivity, impacts, pressures, [SDE.ES]Environmental Sciences/Environmental and Society
Abstract: International audience; Standardised sensitivity data on marine habitats is an essential support in the management ofhuman activities at regional, national and international scales. We developed a methodology forassessing the sensitivity of marine habitats to human pressures, as well as associated guidanceon how to use the resulting sensitivity assessments. The sensitivity of 41 French Mediterraneanbenthic habitats to 12 physical pressures was assessed as part of the first stage of this project;other physical, chemical and biological pressures will be defined and assessed shortly. Resultswill feed into risk assessments allowing the identification of conservation priorities and thedevelopment of spatial planning strategies. By maximising methodological consistency in thegeneration of sensitivity data with other Member States, and sharing the outputs of this projectinternationally, we hope to facilitate collective use of sensitivity information under the HabitatsDirective, the Marine Strategy Framework Directive, the Marine Spatial Planning Directive andthe Regional Sea Conventions (such as Barcelona Convention).
Published: 2019

48. Major roads have important negative effects on insectivorous bat activity

Author: Yves Bas, Kévin Barré, Julie Pauwels, Fabien Claireau, Benjamin Allegrini, Sébastien J. Puechmaille, Nathalie Machon, Christian Kerbiriou, Universität Greifswald - University of Greifswald, Naturalia-Environnement, Centre d'Ecologie et des Sciences de la COnservation (CESCO), Muséum national d'Histoire naturelle (MNHN)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Institut des Sciences de l'Evolution de Montpellier (UMR ISEM), École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Montpellier (UM)-Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Centre National de la Recherche Scientifique (CNRS)-Institut de recherche pour le développement [IRD] : UR226, Station de Biologie Marine de Concarneau, Direction générale déléguée à la Recherche, à l’Expertise, à la Valorisation et à l’Enseignement-Formation (DGD.REVE), Muséum national d'Histoire naturelle (MNHN)-Muséum national d'Histoire naturelle (MNHN), ANRT, NATURALIA-ENVIRONNEMENT, Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-École Pratique des Hautes Études (EPHE), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Montpellier (UM)-Institut de recherche pour le développement [IRD] : UR226-Centre National de la Recherche Scientifique (CNRS)
Subjects: 0106 biological sciences, biology, Ecology, 010604 marine biology & hydrobiology, Rhinolophus hipposideros, Foraging, Biodiversity, Cumulative effects, 15. Life on land, biology.organism_classification, 010603 evolutionary biology, 01 natural sciences, Geography, [SDV.EE.ECO]Life Sciences [q-bio]/Ecology, environment/Ecosystems, Habitat, 13. Climate action, media_common.cataloged_instance, Eptesicus serotinus, Pipistrellus pipistrellus, European union, [SDE.BE]Environmental Sciences/Biodiversity and Ecology, Ecology, Evolution, Behavior and Systematics, Nature and Landscape Conservation, media_common
Abstract: International audience; The development of transportation infrastructure has been identified as one of the main pressures on biodiversity. The effects of transport infrastructure are more documented for terrestrial mammals, birds and amphibians than for bats. To assess the impacts of roads on bat activity, we carried out full-night acoustic recordings of bat calls at 306 sampling points at different distances from a major road at three study sites in France. To assess the relationship between bat activity and the distance to the major road, we performed generalized linear mixed model analyses for thirteen different species or groups and additionally explored the non-linear effect with generalized additive mixed models. Our results showed that low-flying species are more affected than high-flying species. Indeed, we found a significant negative effect of major roads on bat activity for the 'clutter-adapted' species, Eptesicus serotinus, Myotis spp., Pipistrellus pipistrellus and Rhinolophus hipposideros. These results demonstrate that the road-effect zone of major roads extends up to five kilometres. Extrapolating those road-effects zones to the major roads in the European Union, we estimated that 35% of the European Union is potentially negatively impacted. Finally, it seems urgent to consider these road effects with the cumulative effects of other roads by improving habitat connectivity and foraging areas in land use policies. Additionally, to implement drastic conservation practices for species of conservation concern in environmental impact assessment studies, efficient mitigation and offset measures implemented should be sized proportionally to the disturbance caused.
Published: 2019

49. Bacterial–Fungal Interactions in the Kelp Endomicrobiota Drive Autoinducer-2 Quorum Sensing

Author: Tourneroche, Anne, Lami, Raphaël, Hubas, Cédric, Blanchet, Elodie, Vallet, Marine, Escoubeyrou, Karine, Paris, Alain, Prado, Soizic, Molécules de Communication et Adaptation des Micro-organismes (MCAM), Muséum national d'Histoire naturelle (MNHN)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Biodiversité et Biotechnologies Microbiennes (LBBM), PIERRE FABRE-EDF (EDF)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Observatoire océanologique de Banyuls (OOB), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Biologie des Organismes et Ecosystèmes Aquatiques (BOREA), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA), Muséum national d'Histoire naturelle (MNHN), Station de Biologie Marine de Concarneau, Direction générale déléguée à la Recherche, à l’Expertise, à la Valorisation et à l’Enseignement-Formation (DGD.REVE), Muséum national d'Histoire naturelle (MNHN)-Muséum national d'Histoire naturelle (MNHN), Observatoire océanologique de Banyuls (OOB), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Sorbonne Université (SU)-Université de Caen Normandie (UNICAEN), and Normandie Université (NU)-Normandie Université (NU)
Subjects: [SDV.MP]Life Sciences [q-bio]/Microbiology and Parasitology, algal holobiont, AI-2, lcsh:QR1-502, quorum sensing (QS), kelp microbiota, biochemical phenomena, metabolism, and nutrition, bacterial–fungal interaction, Microbiology, lcsh:Microbiology, Original Research, bacterial-fungal interaction, [SDV.EE.IEO]Life Sciences [q-bio]/Ecology, environment/Symbiosis
Abstract: International audience; Brown macroalgae are an essential component of temperate coastal ecosystems and a growing economic sector. They harbor diverse microbial communities that regulate algal development and health. This algal holobiont is dynamic and achieves equilibrium via a complex network of microbial and host interactions. We now report that bacterial and fungal endophytes associated with four brown algae (Ascophyllum nodosum, Pelvetia canaliculata, Laminaria digitata, and Saccharina latissima) produce metabolites that interfere with bacterial autoinducer-2 quorum sensing, a signaling system implicated in virulence and host colonization. Additionally, we performed co-culture experiments combined to a metabolomic approach and demonstrated that microbial interactions influence production of metabolites, including metabolites involved in quorum sensing. Collectively, the data highlight autoinducer-2 quorum sensing as a key metabolite in the complex network of interactions within the algal holobiont.
Published: 2019

50. Bat overpasses as an alternative solution to restore habitat connectivity in the context of road requalification

Author: Jean-François Julien, Fabien Claireau, Nathalie Machon, Yves Bas, Christian Kerbiriou, Sébastien J. Puechmaille, Benjamin Allegrini, Centre d'Ecologie et des Sciences de la COnservation (CESCO), Muséum national d'Histoire naturelle (MNHN)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Naturalia-Environnement, Universität Greifswald - University of Greifswald, Institut des Sciences de l'Evolution de Montpellier (UMR ISEM), École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Montpellier (UM)-Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Centre National de la Recherche Scientifique (CNRS)-Institut de recherche pour le développement [IRD] : UR226, Station de Biologie Marine de Concarneau, Direction générale déléguée à la Recherche, à l’Expertise, à la Valorisation et à l’Enseignement-Formation (DGD.REVE), Muséum national d'Histoire naturelle (MNHN)-Muséum national d'Histoire naturelle (MNHN), ANRT, NATURALIA-ENVIRONNEMENT, Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-École Pratique des Hautes Études (EPHE), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Montpellier (UM)-Institut de recherche pour le développement [IRD] : UR226-Centre National de la Recherche Scientifique (CNRS)
Subjects: Environmental Engineering, Habitat fragmentation, [SDE.IE]Environmental Sciences/Environmental Engineering, Foraging, Wildlife, Fragmentation (computing), Context (language use), 04 agricultural and veterinary sciences, 010501 environmental sciences, 15. Life on land, Management, Monitoring, Policy and Law, 01 natural sciences, Geography, [SDV.EE.ECO]Life Sciences [q-bio]/Ecology, environment/Ecosystems, Habitat, 040103 agronomy & agriculture, 0401 agriculture, forestry, and fisheries, [SDE.BE]Environmental Sciences/Biodiversity and Ecology, Cartography, 0105 earth and related environmental sciences, Nature and Landscape Conservation
Abstract: International audience; Roads have a multitude of negative effects on wildlife, including their prominent role in habitat fragmentation. Habitat fragmentation particularly affects bats during their nightly movements between roosts and foraging areas. Bat overpasses are among the proposed improvements intended to reduce the fragmentation impact of roads, but they have rarely been tested. In this study, we performed a Before-After Control-Impact analysis (BACI) to assess the efficiency of one bat overpass on the number of bat crossings, by using an acoustic flight path reconstruction (AFPR) approach. We obtained 888 bat crossings of five taxa. Our results showed that the number of bat crossings increased significantly after the installation of the bat overpass. Finally, we demonstrated that an overpass correctly placed with respect to a narrow commuting route (a twenty-meter-wide hedgerow) could efficiently restore bat habitat connectivity.
Published: 2019

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