Author: "Philippe Cuny" / Topic: biology - Searchworks@Jio Institute Digital Library Search Results

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1. 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
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2. Sediment reworking by the burrowing polychaete Hediste diversicolor modulated by environmental and biological factors across the temperate North Atlantic. A tribute to Gaston Desrosiers

Author: Patrick Gillet, Ronnie N. Glud, Gary T. Banta, Erik Kristensen, Martin Solan, Renald Belley, Robert C. Aller, Anthony Maire, Jonas S. Gunnarsson, Michael J. Townsend, Franck Gilbert, Philippe Cuny, Lois Calder, Stina Lindqvist, Xavier de Montaudouin, Emma Michaud, Stephen Widdicombe, Judith R. Renz, Luca Giorgio Bellucci, Stefan Hulth, Karl Norling, Philippe Archambault, Jasmin A. Godbold, Susanne P. Eriksson, Stefan Forster, Nils Volkenborn, Georges Stora, 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), University of Southern Denmark (SDU), School of Marine and Atmospheric Sciences [Stony Brook] (SoMAS), Stony Brook University [SUNY] (SBU), State University of New York (SUNY)-State University of New York (SUNY), Roskilde University, Institut des Sciences de la MER de Rimouski (ISMER), Université du Québec à Rimouski (UQAR), Québec-Océan, Université Laval [Québec] (ULaval), Istituto di Scienze Marine [Bologna] (ISMAR), Istituto di Science Marine (ISMAR ), National Research Council of Italy | Consiglio Nazionale delle Ricerche (CNR)-National Research Council of Italy | Consiglio Nazionale delle Ricerche (CNR), Scottish Association for Marine Science (SAMS), 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), 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), Department of Biological and Environmental Sciences [Gothenburg], University of Gothenburg (GU), University of Rostock, Mer, molécules et santé (MMS UCO), Université Catholique de l'Ouest (UCO)-PRES Université Nantes Angers Le Mans (UNAM), Ocean and Earth Science [Southampton], University of Southampton-National Oceanography Centre (NOC), University of Southampton, Nordic Centre of Earth Evolution (NORDCEE), University of Copenhagen = Københavns Universitet (UCPH), Department of Ecology, Environment and Plant Sciences [Stockholm], Stockholm University, Department of Chemistry and Molecular Biology [Gothenburg], 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), National Institute of Water and Atmosphere [Hamilton] (NIWA), Alfred Wegener Institute for Polar and Marine Research (AWI), Plymouth Marine Laboratory (PML), Centre National de la Recherche Scientifique - CNRS (FRANCE), Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE), Université Toulouse III - Paul Sabatier - UT3 (FRANCE), 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), Consiglio Nazionale delle Ricerche (CNR)-Consiglio Nazionale delle Ricerche (CNR), 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), University of Copenhagen = Københavns Universitet (KU), 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), and Plymouth Marine Laboratory
Subjects: 0106 biological sciences, Biodiversité et Ecologie, Functional response group, Aquatic Science, Intraspecific variation, 010603 evolutionary biology, 01 natural sciences, Bioturbation, Sediment reworking, Hediste diversicolor, Functional effect group, [SDV.EE.ECO]Life Sciences [q-bio]/Ecology, environment/Ecosystems, BioturbationSediment reworking, Organic matter, Ecosystem, 14. Life underwater, Nereis, Ecology, Evolution, Behavior and Systematics, chemistry.chemical_classification, Biomass (ecology), biology, 010604 marine biology & hydrobiology, Sediment, 15. Life on land, biology.organism_classification, Oceanography, chemistry, Ecosystèmes, 13. Climate action, Benthic zone, [SDE.BE]Environmental Sciences/Biodiversity and Ecology
Abstract: Particle mixing and irrigation of the seabed by benthic fauna (bioturbation) have major impacts on ecosystem functions such as remineralization of organic matter and sediment-water exchange. As a tribute to Prof. Gaston Desrosiers by the Nereis Park association, eighteen laboratories carried out a collaborative experiment to acquire a global snapshot of particle reworking by the polychaete Hediste diversicolor at 16 sites surrounding the Northern Atlantic. Organisms and soft sediments were collected during May – July at different geographical locations and, using a common laboratory protocol, particulate fluorescent tracers (‘luminophores’) were used to quantify particle transport over a 10-day period. Particle mixing was quantified using the maximum penetration depth of tracers (MPD), particle diffusive coefficients (Db), and non-local transport coefficients (r). Non-local coefficients (reflecting centimeter scale transport steps) ranged from 0.4 to 15 yr−1, and were not correlated across sites with any measured biological (biomass, biovolume) or environmental parameters (temperature, grain size, organic matter). Maximum penetration depths (MPD) averaged ~10.7 cm (6.5–14.5 cm), and were similar to the global average bioturbation depth inferred from short-lived radiochemical tracers. MPD was also not correlated with measures of size (individual biomass), but increased with grain size and decreased with temperature. Biodiffusion (Db) correlated inversely with individual biomass (size) and directly with temperature over the environmental range (Q10 ~ 1.7; 5–21 °C). The transport data were comparable in magnitude to rates reported for localized H. diversicolor populations of similar size, and confirmed some but not all correlations between sediment reworking and biological and environmental variables found in previous studies. The results imply that measures of particle reworking activities of a species from a single location can be generally extrapolated to different populations at similar conditions.
Published: 2021
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3. 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
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4. Fate of petroleum hydrocarbons in bioturbated pristine sediments from Caleta Valdés (Patagonia Argentina): An ex situ bioassay

Author: Jose Luis Esteves, Franck Gilbert, Philippe Cuny, J. Sturla Lompré, M. Franco, M.G. Commendatore, M. Sepúlveda, A. Ferrando, Cécile Militon, Vincent Grossi, M. Nievas, Georges Stora, Consejo Nacional de Investigaciones Científicas y Técnicas [Buenos Aires] (CONICET), Universidad Tecnologica Nacional - UTN (ARGENTINA), Laboratoire de Géologie de Lyon - Terre, Planètes, Environnement [Lyon] (LGL-TPE), École normale supérieure - Lyon (ENS Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut national des sciences de l'Univers (INSU - 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)-Centre National de la Recherche Scientifique (CNRS)-Université de Toulon (UTLN), 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 de Géologie de Lyon - Terre, Planètes, Environnement (LGL-TPE), École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut national des sciences de l'Univers (INSU - CNRS)-Université Jean Monnet - Saint-Étienne (UJM)-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), 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), Aix-Marseille Université - AMU (FRANCE), Centre National de la Recherche Scientifique - CNRS (FRANCE), Ecole Normale Supérieure de Lyon - ENS de Lyon (FRANCE), Institut National Polytechnique de Toulouse - INPT (FRANCE), Institut de Recherche pour le Développement - IRD (FRANCE), Université Toulouse III - Paul Sabatier - UT3 (FRANCE), Université Claude Bernard-Lyon I - UCBL (FRANCE), Université du Sud Toulon-Var - USTV (FRANCE), Consejo Nacional de Investigaciones Científicas y Técnicas - CONICET (ARGENTINA), Laboratoire de géologie de Lyon : Terre, planètes et environnement - TPE (Villeurbanne, France), and Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Subjects: 0106 biological sciences, Geologic Sediments, Health, Toxicology and Mutagenesis, Phytane, 010501 environmental sciences, 01 natural sciences, Ciencias de la Tierra y relacionadas con el Medio Ambiente, [SPI.MAT]Engineering Sciences [physics]/Materials, purl.org/becyt/ford/1 [https], purl.org/becyt/ford/1.5 [https], chemistry.chemical_compound, Soil Pollutants, Petroleum Pollution, PETROLEUM HYDROCARBONS, Soil Microbiology, chemistry.chemical_classification, biology, [SDE.IE]Environmental Sciences/Environmental Engineering, General Medicine, Pollution, PATAGONIA, Biodegradation, Environmental, Petroleum, Hydrocarbon, Unresolved complex mixture, Environmental chemistry, Biological Assay, Bioturbation, CIENCIAS NATURALES Y EXACTAS, Chromatography, Gas, Matériaux, Otras Ciencias de la Tierra y relacionadas con el Medio Ambiente, Argentina, Ingénierie de l'environnement, 14. Life underwater, 0105 earth and related environmental sciences, Bacteria, Terpenes, 010604 marine biology & hydrobiology, Pristane, Public Health, Environmental and Occupational Health, Sediment, Petroleum hydrocarbonsEcotoxicologyBioturbationSoft sedimentsPatagonia, biology.organism_classification, ECOTOXICOLOGY, Caleta, Hydrocarbons, Petroleum hydrocarbons Ecotoxicology Bioturbation Soft sediments Patagonia, chemistry, 13. Climate action, BIOTURBATION, Environmental science, SOFT SEDIMENTS
Abstract: Petroleum can pollute pristine shorelines as a consequence of accidental spills or chronic leaks. In this study, the fate of petroleum hydrocarbons in soft pristine sediment of Caleta Valdés (Argentina) subject to ex situ simulated oil pollution was assessed. Sedimentary columns were exposed to medium and high concentrations of Escalante Crude Oil (ECO) and incubated in the laboratory during 30 days. Levels of aliphatic hydrocarbons at different depths of the sedimentary column were determined by gas chromatography. Oil penetration was limited to the first three centimetres in both treatments, and under this depth, hydrocarbons were clearly biogenic (terrestrial plants) as in the whole sedimentary column of the control assay. Bioturbation by macrobenthic infauna was strongly impacted by oil pollution which resulted in reduced sediment oxygenation and low burial of petroleum hydrocarbons. This may partly explain the limited hydrocarbon biodegradation observed, as indicated by the relatively high values of the ratios nC17/pristane, nC18/phytane, and total resolved aliphatic hydrocarbons/unresolved complex mixture. Correspondingly, at the end of the experiment the most probable number of hydrocarbon-degrading bacteria reached ~ 103 MPN g−1 dry weight. These values were lower than those found in chronically polluted coastal sediments, reflecting a low activity level of the oil-degrading community. The results highlight the low attenuation capacities of Caleta Valdés pristine sediments to recover its original characteristics in a short time period if an oil spill occurs. In this work, we present a novel and integrative tool to evaluate the fate of petroleum hydrocarbons and their potential damage on pristine sediments. Fil: Sturla Lompre, Julieta. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Centro para el Estudio de Sistemas Marinos; Argentina Fil: Nievas El Makte, Marina Lucrecia. Universidad Tecnológica Nacional; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Centro para el Estudio de Sistemas Marinos; Argentina Fil: Franco, M.. Universidad Tecnológica Nacional; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Grossi, V.. Université Claude Bernard Lyon 1; Francia Fil: Ferrando, Agustina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Centro para el Estudio de Sistemas Marinos; Argentina. Universidad Tecnológica Nacional; Argentina Fil: Militon, C.. Aix Marseille Université; Francia Fil: Gilbert, F.. Centre National de la Recherche Scientifique; Francia. Université de Toulouse; Francia Fil: Cuny, P.. Aix Marseille Université; Francia Fil: Stora, G.. Aix Marseille Université; Francia Fil: Sepúlveda, Marcela Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Centro para el Estudio de Sistemas Marinos; Argentina Fil: Esteves, Jose Luis. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Centro para el Estudio de Sistemas Marinos; Argentina Fil: Commendatore, Marta Graciela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Centro para el Estudio de Sistemas Marinos; Argentina
Published: 2018
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5. Functional response of an adapted subtidal macrobenthic community to an oil spill: macrobenthic structure and bioturbation activity over time throughout an 18-month field experiment

Author: Franck Gilbert, Philippe Cuny, Georges Stora, 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 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), Aix-Marseille Université - AMU (FRANCE), Centre National de la Recherche Scientifique - CNRS (FRANCE), Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE), Institut de Recherche pour le Développement - IRD (FRANCE), Université Toulouse III - Paul Sabatier - UT3 (FRANCE), and Université du Sud Toulon-Var - USTV (FRANCE)
Subjects: Geologic Sediments, Subtidal shallow sediments, Health, Toxicology and Mutagenesis, Field experiment, Biochimie, Biologie Moléculaire, [SDV.EE.ECO]Life Sciences [q-bio]/Ecology, environment/Ecosystems, Animals, Environmental Chemistry, Ecotoxicology, [SDV.BBM]Life Sciences [q-bio]/Biochemistry, Molecular Biology, Petroleum Pollution, Sediment reworking, Ecosystem, Polychaete, biology, Ecology, Water Pollution, Community structure, Biologie moléculaire, [SDV.BBM.BM]Life Sciences [q-bio]/Biochemistry, Molecular Biology/Molecular biology, Polychaeta, General Medicine, Contamination, Burrow, biology.organism_classification, Pollution, Macrobenthic community, Petroleum, Oceanography, Ecosystèmes, Benthic zone, Acute oil contamination, Environmental science, Bioturbation
Abstract: International audience; An experimental oil spill was carried out in order toassess in situ responses of a macrobenthic community of shallow subtidal sediments historically exposed to petroleum contamination. Both structural and functional (bioturbation activity) parameters of the community, subjected or not to a pulse acute contamination (25,000 ppm), were studied for 18 months. No difference in the community structure was detected between contaminated and control sediments, from 6 to 18 months of experimentation. Vertical distributions of organisms, however, were affected by the presence of oil contamination leading to a deeper burial of some polychaete species. In the same time, changes in sediment-reworking activity and more especially a deeper particle burying in sediments subjected to acute oil contamination were shown.These results highlight the need to complete the analysis of community structure by assessing functional aspects, such as bioturbation activity, a process integrating various aspects of benthic behaviour (e.g. feeding, locomotion, burrow building)in order to estimate real (structural and functional) and longterm effects of oil contamination on benthic communities.
Published: 2014
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6. Metatranscriptomes of oil-contaminated marine coastal sediment affected by oil addition and/or by the bioturbating activity of the marine polychaete Hediste diversicolor: Who are the microbial players?

Author: Alexandre Atkinson, Céline Jeziorski, Patricia Bonin, Cécile Militon, Valérie Michotey, Robert Duran, Cristiana Cravo-Laureau, Philippe Cuny, Institut méditerranéen d'océanologie ( MIO ), Institut de Recherche pour le Développement ( IRD ) -Aix Marseille Université ( AMU ) -Université de Toulon ( UTLN ) -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)-Centre National de la Recherche Scientifique (CNRS)-Université de Toulon (UTLN), Génome et Transcriptome - Plateforme Génomique (GeT-PlaGe), Institut National de la Recherche Agronomique (INRA)-Plateforme Génome & Transcriptome (GET), Génopole Toulouse Midi-Pyrénées [Auzeville] (GENOTOUL), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Ecole Nationale Vétérinaire de Toulouse (ENVT), Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Université Fédérale Toulouse Midi-Pyrénées-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Génopole Toulouse Midi-Pyrénées [Auzeville] (GENOTOUL), Université Fédérale Toulouse Midi-Pyrénées-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Equipe Environnement et Microbiologie (EEM ), 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)-Université de Pau et des Pays de l'Adour (UPPA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), French National Agency (ANR) under the DHYVA project [ANR 2006 SEST 09], French National Agency (ANR) under DECAPAGE project [ANR 2011 CESA 006 01], ANR-06-SEST-0009,DHYVA,Dégradation d'HYdrocarbures dans les VAsières (DHYVA) : Rôle des mécanismes bactériens et effet de la bioturbation dans la biodisponibilité des polluants organiques(2006), ANR-11-CESA-0006,DECAPAGE,Caractérisation des capacités de dégradation de communautés bactériennes de sédiments marins : adaptation, processus métaboliques et influence des régimes d'oxygénation(2011), 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), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Ecole Nationale Vétérinaire de Toulouse (ENVT), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Génopole Toulouse Midi-Pyrénées [Auzeville] (GENOTOUL), Université de Toulouse (UT)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Ecole Nationale Vétérinaire de Toulouse (ENVT), Université Fédérale Toulouse Midi-Pyrénées-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Université Fédérale Toulouse Midi-Pyrénées-Institut National de la Santé et de la Recherche Médicale (INSERM)-Génopole Toulouse Midi-Pyrénées [Auzeville] (GENOTOUL), Université Fédérale Toulouse Midi-Pyrénées-Institut National de la Santé et de la Recherche Médicale (INSERM), Université Fédérale Toulouse Midi-Pyrénées-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Toulouse III - Paul Sabatier (UT3), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), GeT PlaGe, Genotoul, Institut National de la Recherche Agronomique (INRA), Université de Pau et des Pays de l'Adour (UPPA)-Centre National de la Recherche Scientifique (CNRS)-Université de Pau et des Pays de l'Adour (UPPA)-Centre National de la Recherche Scientifique (CNRS), and Centre National de la Recherche Scientifique (CNRS)-Université de Toulon (UTLN)-Aix Marseille Université (AMU)-Institut de Recherche pour le Développement (IRD)
Subjects: 0301 basic medicine, Geologic Sediments, Hydrocarbon, Microorganism, [ SDV.BBM.BM ] Life Sciences [q-bio]/Biochemistry, Molecular Biology/Molecular biology, 010501 environmental sciences, Aquatic Science, 01 natural sciences, 03 medical and health sciences, Microbial community, Genetics, [ SDV.EE.IEO ] Life Sciences [q-bio]/Ecology, environment/Symbiosis, Animals, Petroleum Pollution, 14. Life underwater, Marine sediment, 0105 earth and related environmental sciences, Polychaete, [ SDE.BE ] Environmental Sciences/Biodiversity and Ecology, Oxygen regimes, biology, Bacteria, Ecology, fungi, Sediment, Polychaeta, [SDV.BBM.BM]Life Sciences [q-bio]/Biochemistry, Molecular Biology/Molecular biology, Contamination, biology.organism_classification, 030104 developmental biology, Microbial population biology, 13. Climate action, Benthic zone, Hediste diversicolor, Metagenome, France, [SDE.BE]Environmental Sciences/Biodiversity and Ecology, Metatranscriptomic, Bioturbation, Transcriptome, [SDV.EE.IEO]Life Sciences [q-bio]/Ecology, environment/Symbiosis
Abstract: In coastal marine sediment, oxygen fluctuations induced by bioturbating activities are widespread and exert a great influence, not only on the structure and diversity of the microbenthic communities, but also on their activities. Thus, the activity of benthic organisms can have a significant influence on the degradation of hydrocarbons (HC) and can favor the development of hydrocarbonoclastic microorganisms in contaminated marine sediments. Here, we have generated metatranscriptomic data from coastal marine sediments affected by oil addition and/or by the reworking activity of the marine polychaete Hediste diversicolor to gain insights into the active microbial groups involved in the response to oil addition under the oxygen-fluctuating conditions. The preliminary results suggest that the macrofauna promote the diversity of active aerobic hydrocarbonoclastic bacteria in marine sediments, even if its influence cannot be strongly observed at the microbial community expression profiles level.
Published: 2016
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7. Oil removal and effects of spilled oil on active microbial communities in close to salt-saturation brines

Author: Marc Krasovec, Léa Sylvi, Philippe Cuny, Yannick Corsellis, Cécile Militon, 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), Institut méditerranéen d'océanologie ( MIO ), and Institut de Recherche pour le Développement ( IRD ) -Aix Marseille Université ( AMU ) -Université de Toulon ( UTLN ) -Centre National de la Recherche Scientifique ( CNRS )
Subjects: 0301 basic medicine, Salinity, 030106 microbiology, Biology, Microbiology, 03 medical and health sciences, chemistry.chemical_compound, Botany, Petroleum Pollution, Organic matter, Environmental Restoration and Remediation, Abiotic component, chemistry.chemical_classification, [ SDE.BE ] Environmental Sciences/Biodiversity and Ecology, Microbiota, General Medicine, Haloquadratum walsbyi, Biodegradation, biology.organism_classification, 6. Clean water, Halobacteriales, Lakes, Petroleum, Microbial population biology, chemistry, Environmental chemistry, Halorhabdus, Molecular Medicine, Salts, [SDE.BE]Environmental Sciences/Biodiversity and Ecology, Microcosm
Abstract: International audience; Abiotic and biotic processes associated with the degradation of a light petroleum in brines close to the salt-saturation (~31 %) and the effect of labile organic matter (LOM) supply (casaminoacids/citrate; 0.2 and 0.1 % w/v, respectively) were followed during an incubation of 30 days. After 4-week incubation at 40 °C under light/dark cycles, a 24 % of abiotic degradation was observed in untreated brines. The stimulation of native brines community with LOM addition allowed an additional 12.8 % oil attenuation due to biodegradation processes. Successional changes in the active microbial community structure due to the oil contamination (16S rRNA DGGE approach) showed the selection of one phylotype affiliated to Salinibacter and the disappearance of Haloquadratum walsbyi in untreated brines. In LOM-amended microcosms, phylotypes related to Salinibacter, Haloarcula, Haloterrigena and Halorhabdus were selected. An effect of hydrocarbon contamination was only observed in the bacterial community with the inhibition of two dominant proteobacterial phylotypes. This study further confirms that short-term and moderate oil biodegradation is possible in LOM-stimulated brines. Biodegradation should be much more reduced under in situ conditions. Self-cleaning capacities of close to saturation hypersaline lakes appears, therefore very limited compared to non-extreme haline environments.
Published: 2016
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8. Oil spill effects on macrofaunal communities and bioturbation of pristine marine sediments (Caleta Valdés, Patagonia, Argentina): experimental evidence of low resistance capacities of benthic systems without history of pollution

Author: Marcos Franco, Jose Luis Esteves, Marina Nievas, Emilia Gonzalez, Agustina Ferrando, M.G. Commendatore, Georges Stora, Franck Gilbert, Philippe Cuny, Cécile Militon, Aix-Marseille Université - AMU (FRANCE), Centre National de la Recherche Scientifique - CNRS (FRANCE), Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE), Institut de Recherche pour le Développement - IRD (FRANCE), Université Toulouse III - Paul Sabatier - UT3 (FRANCE), Universidad Tecnologica Nacional - UTN (ARGENTINA), Université du Sud Toulon-Var - USTV (FRANCE), Centro Nacional Patagonico - CENPAT (ARGENTINA), Universidad Nacional de la Patagonia San Juan Bosco - UNPSJB (ARGENTINA), Institut Méditerranéen d'Océanologie - Mediterranean Institute of Oceanography - MIO (Marseille, France), Centro Nacional Patagónico (CENPAT), Universidad Tecnológica Nacional [Sarmiento] (UTN), 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 Ecologie Fonctionnelle et Environnement (ECOLAB), 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 Fédérale Toulouse Midi-Pyrénées-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)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées, Centro Nacional Patagónico ( CENPAT-CONICET ), Universidad Tecnológica Nacional [Sarmiento] ( UTN ), Institut méditerranéen d'océanologie ( MIO ), Institut de Recherche pour le Développement ( IRD ) -Aix Marseille Université ( AMU ) -Université de Toulon ( UTLN ) -Centre National de la Recherche Scientifique ( CNRS ), Laboratoire Ecologie Fonctionnelle et Environnement - ECOLAB ( ECOLAB ), Institut National Polytechnique [Toulouse] ( INP ) -Université Paul Sabatier - Toulouse 3 ( UPS ) -Observatoire Midi-Pyrénées ( OMP ) -Centre National de la Recherche Scientifique ( CNRS ), Institut National Polytechnique de Toulouse - INPT (FRANCE), Universidad Nacional de la Patagonia San Juan Bosco (UNPSJB), 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), 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: 0106 biological sciences, Pollution, Geologic Sediments, Health, Toxicology and Mutagenesis, media_common.quotation_subject, Macrobenthic communities, Argentina, Oil pollution, 010501 environmental sciences, 01 natural sciences, Ciencias de la Tierra y relacionadas con el Medio Ambiente, [ SDV.EE ] Life Sciences [q-bio]/Ecology, environment, Crustacea, Patagonia, Animals, Environmental Chemistry, Ecotoxicology, Petroleum Pollution, Resistance capacities, 14. Life underwater, Oligochaeta, Ecosystem, 0105 earth and related environmental sciences, media_common, [SDV.EE]Life Sciences [q-bio]/Ecology, environment, Ecologie, Environnement, biology, Ecology, 010604 marine biology & hydrobiology, Sediment, General Medicine, Pristine marinesediments, Contamination, biology.organism_classification, Caleta, 6. Clean water, Petroleum, 13. Climate action, Benthic zone, Ciencias Medioambientales, Environmental science, Species richness, Bioturbation, Pristine marine sediments, CIENCIAS NATURALES Y EXACTAS
Abstract: The Patagonian coast is characterized by the existence of pristine ecosystems which may be particularly sensitive to oil contamination. In this study, a simulated oil spill at acute and chronic input levels was carried out to assess the effects of contamination on the macrobenthic community structure and the bioturbation activity of sediments sampled in Caleta Valdés creek. Superficial sediments were either noncontaminated or contaminated by Escalante crude oil and incubated in the laboratory for 30 days. Oil contamination induced adverse effects on macrobenthic community at both concentrations with, for the highest concentration, a marked decrease of approximately 40 and 55 % of density and specific richness, respectively. Besides the disappearance of sensitive species, some other species like Oligochaeta sp. 1, Paranebalia sp., and Ostracoda sp. 2 species have a higher resistance to oil contamination. Sediment reworking activity was also affected by oil addition. At the highest level of contamination, nearly no activity was observed due to the high mortality of macroorganisms. The results strongly suggest that an oil spill in this protected marine area with no previous history of contamination would have a deep impact on the non-adapted macrobenthic community. Fil: Ferrando, Agustina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina Fil: Gonzalez, Emilia. Universidad Nacional de la Patagonia "San Juan Bosco"; Argentina Fil: Franco, Marcos Antonio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina. Universidad Tecnológica Nacional. Facultad Regional Chubut; Argentina Fil: Commendatore, Marta Graciela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina Fil: Nievas El Makte, Marina Lucrecia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina. Universidad Tecnológica Nacional. Facultad Regional Chubut; Argentina Fil: Militon, Cécile. Centre National de la Recherche Scientifique; Francia Fil: Stora, Georges. Centre National de la Recherche Scientifique; Francia Fil: Gilbert, Franck. Centre National de la Recherche Scientifique; Francia. Universite Toulose 1 Capitole; Francia Fil: Esteves, Jose Luis. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina Fil: Cuny, Philippe. Centre National de la Recherche Scientifique; Francia
Published: 2015
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9. Phenanthrene degradation, emulsification and surface tension activities of apseudomonas putidastrain isolated from a coastal oil contaminated microbial mat

Author: Philippe Cuny, M. Gilewicz, and Monique Acquaviva
Subjects: chemistry.chemical_classification, biology, Strain (chemistry), Aquatic Science, Biodegradation, Phenanthrene, biology.organism_classification, Pseudomonas putida, Microbiology, chemistry.chemical_compound, Bioremediation, Hydrocarbon, chemistry, Environmental chemistry, Degradation (geology), Microbial mat
Abstract: Kinetics of phenanthrene degradation, emulsification and surface tension activities of this hydrocarbon upon degradation by a Pseudomonas putida (COB 3-2) isolated from a coastal microbial mat were investigated. After 27 days of incubation at 20°C, 71.4±3.4 % of the initial phenanthrene amount (0.4 g l-1) were biodegraded. Observation of both tension-active and emulsifying activities indicated that biosurfactants, probably rhamnolipids, are generated. The high phenanthrene degrading capacity and biosurfactant production potential of this newly isolated P. putida strain may contribute positively to oil bioremediation processes within the microbial mat.
Published: 2004
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10. Isolation of alkane-degrading bacteria from deep-sea Mediterranean sediments

Author: Philippe Cuny, Catherine Guigue, J.C. Bertrand, Yosmina Tapilatu, Gilles Miralles, Monique Acquaviva, Laboratoire de MicrobiologiE de Géochimie et d'Ecologie Marines (LMGEM), and Université de la Méditerranée - Aix-Marseille 2-Centre National de la Recherche Scientifique (CNRS)
Subjects: Mediterranean climate, Alkane-degrading bacteria, Applied Microbiology and Biotechnology, Deep sea, Water Purification, 03 medical and health sciences, Mediterranean sea, Bioremediation, Alkanes, Mediterranean Sea, Seawater, Alcanivorax, 14. Life underwater, ComputingMilieux_MISCELLANEOUS, deep-sea sediments, 030304 developmental biology, [SDU.OCEAN]Sciences of the Universe [physics]/Ocean, Atmosphere, 0303 health sciences, Alkane-degrading bcacteria, Bacteria, biology, 030306 microbiology, Ecology, Marinobacter, biology.organism_classification, Biodegradation, Environmental, Petroleum, 13. Climate action, Petroleum microbiology, Water Microbiology, Rhodococcus
Abstract: Aims: To isolate and identify alkane-degrading bacteria from deep-sea superficial sediments sampled at a north-western Mediterranean station. Methods and Results: Sediments from the water/sediment interface at a 2400 m depth were sampled with a multicorer at the ANTARES site off the French Mediterranean coast and were promptly enriched with Maya crude oil as the sole source of carbon and energy. Alkane-degrading bacteria belonging to the genera Alcanivorax, Pseudomonas, Marinobacter, Rhodococcus and Clavibacter-like were isolated, indicating that the same groups were potentially involved in hydrocarbon biodegradation in deep sea as in coastal waters. Conclusions: These results confirm that members of Alcanivorax are important obligate alkane degraders in deep-sea environments and coexist with other degrading bacteria inhabiting the deep-subsurface sediment of the Mediterranean. Significance and Impact of the Study: The results suggest that the isolates obtained have potential applications in bioremediation strategies in deep-sea environments and highlight the need to identify specific piezophilic hydrocarbon-degrading bacteria (HCB) from these environments.
Published: 2010
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11. Enhanced biodegradation of phenanthrene by a marine bacterium in presence of a synthetic surfactant

Author: J.C. Bertrand, J. Faucet, Monique Acquaviva, M. Gilewicz, and Philippe Cuny
Subjects: chemistry.chemical_classification, Chromatography, biology, Aqueous two-phase system, Polysorbates, Polycyclic aromatic hydrocarbon, Substrate (chemistry), Phenanthrenes, Phenanthrene, Biodegradation, Sphingomonas, biology.organism_classification, Applied Microbiology and Biotechnology, Bioavailability, Surface-Active Agents, chemistry.chemical_compound, Biodegradation, Environmental, Hydrocarbon, Solubility, chemistry
Abstract: The biodegradation of phenanthrene by the marine strain Sphingomonas sp. 2MPII (DSMZ 11572) was enhanced by the solubilizating properties of the nonionic surfactant Tween 80. After 197 h of incubation, 85 +/- 4% of the initial amount of phenanthrene (0.4 g l-1) was biodegraded in presence of Tween 80 (0.5 g l-1) as opposed to 52 +/- 5% without this synthetic surfactant. These results confirm that the activity of the strain 2MPII is limited by the bioavailability of the polycyclic aromatic hydrocarbon (PAH) substrate in the aqueous phase. Tween 80 appears to be efficient in increasing the bioavailability of hydrophobic compounds such as PAHs.
Published: 1999
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12. Comparison of the photodegradation rates of chlorophyll chlorin ring and phytol side chain in phytodetritus: is the phytyldiol versus phytol ratio (CPPI) a new biogeochemical index?

Author: Philippe Cuny, Béatrice Beker, Jean-François Rontani, and J. C. Romano
Subjects: Chlorophyll b, Chlorophyll a, Chlorophyllase, biology, Chlorophyll c, Chlorophyceae, Aquatic Science, biology.organism_classification, chemistry.chemical_compound, Phytol, chemistry, Environmental chemistry, Chlorophyll, Botany, Chlorophyllase activity, Ecology, Evolution, Behavior and Systematics
Abstract: Rates of photodegradation of chlorophylls in their entirety and of chlorophyll phytyl chains, and time evolution of the Chlorophyll Phytyl side-Chain Photodegradation Index (CPPI) under visible light exposure were determined and compared in laboratory experiments. Killed phytoplanktonic cells of two widespread Bacillariophyceae (Thalassiosira rotula Meun. and Skeletonema costatum (Grev.) Cleve), one widespread Prymnesiophyceae (Emiliania huxleyi (Lohm.) May and Mohler) and one Chlorophyceae (Dunaliella tertiolecta Butch) were used as source of pigments (chlorophyll a, chlorophyll b and phaeophytin a). Chlorophyll and chlorophyll phytyl chain photodegradation and CPPI evolution showed apparent first-order kinetics with respect to light exposure. The in vitro determined degradation rates were approximately 3.5 times higher for the chlorophyll tetrapyrrolic structure than for the phytyl chain. Few variations of the relative photodegradation constant rates were observed between strains: less than 34% for chlorophyll a and 25% for chlorophyll phytyl chain at 20°C. Nonetheless, the photo-oxidation process of the phytyl chain (Q10=2.0) seems more affected by temperature than does chlorophyll a (Q10=1.4). Phytol loss in the dark controls have been attributed to bacterial degradation, and, in the case of S. costatum, chlorophyllase dephytylation seems to have enhanced the potential for bacterial biodegradation. From these results, it clearly appears that in small detrital particles not only chlorophyll a, chlorophyll b and phaeophytin but also their phytyl chains may be rapidly photodegraded in the upper portion of the euphotic zone. The use of the CPPI for monitoring the chlorophyll photo-oxidation process in the aquatic environment is discussed.
Published: 1999
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13. Effects of Hydrostatic Pressure on Growth and Luminescence of a Moderately-Piezophilic Luminous Bacteria Photobacterium phosphoreum ANT-2200

Author: Badr Al Ali, Laurence Casalot, Christian Tamburini, Muriel Pacton, Séverine Martini, David Nerini, Marc Garel, Vincent Grossi, Philippe Cuny, 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 de MicrobiologiE de Géochimie et d'Ecologie Marines (LMGEM), Université de la Méditerranée - Aix-Marseille 2-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Géologie de Lyon - Terre, Planètes, Environnement (LGL-TPE), École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut national des sciences de l'Univers (INSU - CNRS)-Université Jean Monnet - Saint-Étienne (UJM)-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)-Centre National de la Recherche Scientifique (CNRS)-Université de Toulon (UTLN), Centre National de la Recherche Scientifique (CNRS)-Université de la Méditerranée - Aix-Marseille 2, Laboratoire de Géologie de Lyon - Terre, Planètes, Environnement [Lyon] (LGL-TPE), École normale supérieure - Lyon (ENS Lyon)-Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Luminescence, Photobacterium phosphoreum, Hydrostatic pressure, Analytical chemistry, lcsh:Medicine, Marine and Aquatic Sciences, Oceanography, Microbial Physiology, Growth rate, Bacterial Physiology, lcsh:Science, [SDU.OCEAN]Sciences of the Universe [physics]/Ocean, Atmosphere, 0303 health sciences, Multidisciplinary, Strain (chemistry), biology, Fatty Acids, Microbial Growth and Development, Marine Ecology, Temperature, Fatty Acids, Unsaturated, Water Microbiology, Algorithms, Mesophile, Research Article, [SDE.MCG]Environmental Sciences/Global Changes, Mineralogy, Marine Biology, Microbiology, Models, Biological, Microbial Ecology, 03 medical and health sciences, Extremophiles, Microscopy, Electron, Transmission, Piezophile, Hydrostatic Pressure, Mediterranean Sea, Bioluminescence, 14. Life underwater, Biology, [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography, 030304 developmental biology, 030306 microbiology, Photobacterium, lcsh:R, Biological Oceanography, Bacteriology, biology.organism_classification, Astrobiology, Kinetics, Earth Sciences, Microscopy, Electron, Scanning, lcsh:Q, [SDE.BE]Environmental Sciences/Biodiversity and Ecology, Developmental Biology
Abstract: Bacterial bioluminescence is commonly found in the deep sea and depends on environmental conditions. Photobacterium phosphoreum ANT-2200 has been isolated from the NW Mediterranean Sea at 2200-m depth (in situ temperature of 13 degrees C) close to the ANTARES neutrino telescope. The effects of hydrostatic pressure on its growth and luminescence have been investigated under controlled laboratory conditions, using a specifically developed high-pressure bioluminescence system. The growth rate and the maximum population density of the strain were determined at different temperatures (from 4 to 37 degrees C) and pressures (from 0.1 to 40 MPa), using the logistic model to define these two growth parameters. Indeed, using the growth rate only, no optimal temperature and pressure could be determined. However, when both growth rate and maximum population density were jointly taken into account, a cross coefficient was calculated. By this way, the optimum growth conditions for P. phosphoreum ANT-2200 were found to be 30 degrees C and, 10 MPa defining this strain as mesophile and moderately piezophile. Moreover, the ratio of unsaturated vs. saturated cellular fatty acids was found higher at 22 MPa, in agreement with previously described piezophile strains. P. phosphoreum ANT-2200 also appeared to respond to high pressure by forming cell aggregates. Its maximum population density was 1.2 times higher, with a similar growth rate, than at 0.1 MPa. Strain ANT-2200 grown at 22 MPa produced 3 times more bioluminescence. The proposed approach, mimicking, as close as possible, the in situ conditions, could help studying deep-sea bacterial bioluminescence and validating hypotheses concerning its role into the carbon cycle in the deep ocean.
Published: 2013
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14. Impact of oil on bacterial community structure in bioturbated sediments

Author: Franck Gilbert, Philippe Cuny, Fatima Mahdaoui, Brice Bouyssiere, David Amouroux, Georges Stora, Cristiana Cravo-Laureau, Robert Duran, Magalie Stauffert, Cécile Militon, Sandra Barantal, François-Xavier Merlin, Christine Cagnon, Ronan Jézéquel, 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 National Polytechnique de Toulouse - Toulouse INP (FRANCE), Institut de Recherche pour le Développement - IRD (FRANCE), Université Toulouse III - Paul Sabatier - UT3 (FRANCE), Université du Sud Toulon-Var - USTV (FRANCE), Université de Pau et des Pays de l'Adour - UPPA (FRANCE), Institut Méditerranéen d'Océanologie - Mediterranean Institute of Oceanography - MIO (Marseille, France), Institut Pluridisciplinaire de Recherche sur l'Environnement et les Matériaux ( IPREM ), Université de Pau et des Pays de l'Adour ( UPPA ) -Centre National de la Recherche Scientifique ( CNRS ), Centre de documentation de recherche et d'expérimentations sur les pollutions accidentelles des eaux ( Cedre ), Cedre, Institut méditerranéen d'océanologie ( MIO ), Institut de Recherche pour le Développement ( IRD ) -Aix Marseille Université ( AMU ) -Université de Toulon ( UTLN ) -Centre National de la Recherche Scientifique ( CNRS ), Laboratoire Ecologie Fonctionnelle et Environnement - ECOLAB ( ECOLAB ), Institut National Polytechnique [Toulouse] ( INP ) -Université Paul Sabatier - Toulouse 3 ( UPS ) -Observatoire Midi-Pyrénées ( OMP ) -Centre National de la Recherche Scientifique ( CNRS ), Institut pluridisciplinaire de recherche sur l'environnement et les matériaux (IPREM), Université de Pau et des Pays de l'Adour (UPPA)-Centre National de la Recherche Scientifique (CNRS), Centre de documentation de recherche et d'expérimentations sur les pollutions accidentelles des eaux (Cedre), 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), Institut Pluridisciplinaire de Recherche sur l'Environnement et les Matériaux (IPREM), 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 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), Université Fédérale Toulouse Midi-Pyrénées-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)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées, and Institut National Polytechnique de Toulouse - INPT (FRANCE)
Subjects: Geologic Sediments, 010501 environmental sciences, Deltaproteobacteria, 01 natural sciences, chemistry.chemical_compound, RNA, Ribosomal, 16S, Petroleum Pollution, Phylogeny, 0303 health sciences, Multidisciplinary, biology, Ecology, Reverse Transcriptase Polymerase Chain Reaction, Community structure, Marine Ecology, Biodiversity, Community Ecology, Ecosystèmes, Medicine, Petroleum, Bacterial community, Bioturbation, Microcosm, Polymorphism, Restriction Fragment Length, Coastal Ecology, Research Article, DNA, Bacterial, Firmicutes, Science, Marine Biology, Real-Time Polymerase Chain Reaction, Microbiology, Microbial Ecology, Sediments, 03 medical and health sciences, [SDV.EE.ECO]Life Sciences [q-bio]/Ecology, environment/Ecosystems, Gammaproteobacteria, DNA, Ribosomal Spacer, Ecosystem, 14. Life underwater, RNA, Messenger, Biology, Community Structure, 030304 developmental biology, 0105 earth and related environmental sciences, Gene Library, Bacteria, Sequence Analysis, DNA, 15. Life on land, biology.organism_classification, Marine Environments, Hydrocarbons, [ SDV.EE.ECO ] Life Sciences [q-bio]/Ecology, environment/Ecosystems, chemistry, Oil fate, Ecological Environments
Abstract: International audience; Oil spills threaten coastlines where biological processes supply essential ecosystem services. Therefore, it is crucial to understand how oil influences the microbial communities in sediments that play key roles in ecosystem functioning. Ecosystems such as sediments are characterized by intensive bioturbation due to burrowing macrofauna that may modify the microbial metabolisms. It is thus essential to consider the bioturbation when determining the impact of oil on microbial communities. In this study, an experimental laboratory device maintaining pristine collected mudflat sediments in microcosms closer to true environmental conditions - with tidal cycles and natural seawater - was used to simulate an oil spill under bioturbation conditions. Different conditions were applied to the microcosms including an addition of: standardized oil (Blend Arabian Light crude oil, 25.6 mg.g21 wet sediment), the common burrowing organism Hediste (Nereis) diversicolor and both the oil and H. diversicolor. The addition of H. diversicolor and its associated bioturbation did not affect the removal of petroleum hydrocarbons. After 270 days, 60% of hydrocarbons had been removed in all microcosms irrespective of the H. diversicolor addition. However, 16S-rRNA gene and 16S-cDNA T-RFLP and RT-PCR-amplicon libraries analysis showed an effect of the condition on the bacterial community structure, composition, and dynamics, supported by PerMANOVA analysis. The 16S-cDNA libraries from microcosms where H. diversicolor was added (oiled and un-oiled) showed a marked dominance of sequences related to Gammaproteobacteria. However, in the oiled-library sequences associated to Deltaproteobacteria and Bacteroidetes were also highly represented. The 16S-cDNA libraries from oiled-microcosms (with and without H. diversicolor addition) revealed two distinct microbial communities characterized by different phylotypes associated to known hydrocarbonoclastic bacteria and dominated by Gammaproteobacteria and Deltaproteobacteria. In the oiled-microcosms, the addition of H. diversicolor reduced the phylotype-richness, sequences associated to Actinobacteria, Firmicutes and Plantomycetes were not detected. These observations highlight the influence of the bioturbation on the bacterial community structure without affecting the biodegradation capacities.
Published: 2013
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15. Photodegradation of chlorophyll phytyl chain in senescent leaves of higher plants

Author: Philippe Cuny, Jean-François Rontani, and Vincent Grossi
Subjects: food.ingredient, Singlet oxygen, Plant Science, General Medicine, Photosynthetic pigment, Horticulture, Biology, Biochemistry, Terpenoid, chemistry.chemical_compound, Avena, food, chemistry, Chlorophyll, Petroselinum sativum, Botany, Poaceae, Photodegradation, Molecular Biology
Abstract: 6,10,14-Trimethylpentadecan-2-one, 3-methylidene-7,11,15-trimethylhexadecan-1,2-diol, (Z and E) 3,7,11,15-tetramethyl-2,3-epoxyhexadecanols, (Z and E) 3,7,11,15-tetramethyl-2,3-epoxyhexadecanals and (Z and E) 3,7,11,15-tetramethylhexadec-2-enals were unambiguously identified in attached leaves of senescing Avena sativa collected during late summer. These isoprenoid compounds result from the photooxidation of the chlorophyll phytyl chain during senescence. In vitro dark and light-induced senescence experiments carried out with Petroselinum sativum confirmed these results.
Published: 1996
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16. Water soluble phenolic compounds of the marine phanerogam Posidonia oceanica in a Mediterranean area colonised by the introduced chlorophyte Caulerpa taxifolia

Author: Henri Jupin, Philippe Cuny, Léon Serve, and Chalres Francois Boudouresque
Subjects: 0106 biological sciences, Acetosyringone, biology, 010604 marine biology & hydrobiology, Caulerpa taxifolia, Phloroglucinol, Plant Science, Aquatic Science, biology.organism_classification, 010603 evolutionary biology, 01 natural sciences, High-performance liquid chromatography, Cinnamic acid, Ferulic acid, chemistry.chemical_compound, chemistry, Posidonia oceanica, Botany, Phenol
Abstract: Unbound phenolic compounds of leaves of the marine phanerogam Posidonia oceanica (L.) Delile from an area colonised by the introduced chlorophyte Caulerpa taxifolia (Vahl) C. Ag. have been investigated and their concentration assessed using high performance liquid chromatography (HPLC). Leaves of the colonised area exhibited high maximum values of phenolic contents in comparison with a reference area. Nonetheless, because of the high variability of the values, further studies will be needed to confirm that P. oceanica plants are producing unbound phenolic compounds in reaction to growth of C. taxifolia. Ferulic acid, phloridzin, phloroglucinol, p-anisic acid, acetosyringone, sinapic acid, phenol, p-hydroxybenzoic acid, p-coumaric acid and cinnamic acid represent more than 95% of the mean relative concentration of phenolic compounds measured. Several of these compounds had not hitherto been reported in P. oceanica.
Published: 1995
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17. Spatial oxygen heterogeneity in a Hediste diversicolor irrigated burrow

Author: Jose Luis Esteves, Laura Pischedda, Jean-Christophe Poggiale, Franck Gilbert, Philippe Cuny, Laboratoire de MicrobiologiE de Géochimie et d'Ecologie Marines ( LMGEM ), Centre National de la Recherche Scientifique ( CNRS ) -Université de la Méditerranée - Aix-Marseille 2, Laboratorio de Oceanografía Química y Contaminación de Aguas, Centro Nacional Patagónico ( CENPAT-CONICET ), Laboratoire Ecologie Fonctionnelle et Environnement - ECOLAB ( ECOLAB ), Institut National Polytechnique [Toulouse] ( INP ) -Université Paul Sabatier - Toulouse 3 ( UPS ) -Observatoire Midi-Pyrénées ( OMP ) -Centre National de la Recherche Scientifique ( CNRS ), Laboratoire de MicrobiologiE de Géochimie et d'Ecologie Marines (LMGEM), Université de la Méditerranée - Aix-Marseille 2-Centre National de la Recherche Scientifique (CNRS), Centro Nacional Patagónico (CENPAT), 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 National de la Recherche Scientifique (CNRS)-Université de la Méditerranée - Aix-Marseille 2, 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), Centre National de la Recherche Scientifique - CNRS (FRANCE), Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE), Université Toulouse III - Paul Sabatier - UT3 (FRANCE), Centro Nacional Patagonico - CENPAT (ARGENTINA), Université de la Méditerranée - Aix-Marseille II (FRANCE), and Institut National Polytechnique de Toulouse - INPT (FRANCE)
Subjects: 0106 biological sciences, Hediste diversicolor burrow, OXYGEN HETEROGENEITY, Water circulation, [SDE.MCG]Environmental Sciences/Global Changes, chemistry.chemical_element, Soil science, Bio-irrigation, 010501 environmental sciences, Aquatic Science, 01 natural sciences, Oxygen, Ciencias de la Tierra y relacionadas con el Medio Ambiente, Marine sediments, parasitic diseases, Ecosystem, 14. Life underwater, [SDU.STU.HY]Sciences of the Universe [physics]/Earth Sciences/Hydrology, Hydrologie, 0105 earth and related environmental sciences, biology, Ecology, 010604 marine biology & hydrobiology, Oceanografía, Hidrología, Recursos Hídricos, fungi, 15. Life on land, biology.organism_classification, Burrow, Anoxic waters, [ SDE.MCG ] Environmental Sciences/Global Changes, chemistry, 13. Climate action, Hediste diversicolor, Laboratory experiment, Bioturbation, Heterogeneity, [ SDU.STU.HY ] Sciences of the Universe [physics]/Earth Sciences/Hydrology, CIENCIAS NATURALES Y EXACTAS
Abstract: The heterogeneity of oxygen distribution in a Hediste diversicolor burrow environment was investigated in a laboratory experiment using a 6-mm thick tank equipped with oxygen planar optodes. The two-dimensional oxygen distribution in a complete burrow was monitored every 2 min for 4 h. Oxygen concentrations fluctuated over a scale of minutes in the burrow lumen and wall (up to 2 mm) reflecting the balance between worm ventilation activity and oxygen consumption. The magnitude of the three surrounding micro-horizons (oxic, oscillating and anoxic) induced by the intermittent worm ventilation was spatially and temporally variable within the structure. Oxygen variations appeared to be controlled by distance from the sediment-water interface and the direction of water circulation. Moreover, there was an apparent 'buffer effect', induced by the proximity to the overlying water, which reduced the variations of lumen and wall oxygen in the upper part of the structure. These results highlight the heterogeneous distribution and dynamics of oxygen associated with H. diversicolor burrows and ventilation activity. They also highlight the necessity of integrating this complexity into the current burrow-base models in order to estimate the ecological importance of burrowing species in coastal ecosystems. Fil: Pischedda, Laura. Université de la Méditerranée. Centre d’Océanologie de Marseill. Laboratoire de Microbiologie, Géochimie et Ecologie Marines; Francia Fil: Cuny, Philippe. Université de la Méditerranée. Centre d’Océanologie de Marseill. Laboratoire de Microbiologie, Géochimie et Ecologie Marines; Francia Fil: Esteves, Jose Luis. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina Fil: Poggiale, Jean Christophe. Université de la Méditerranée. Centre d’Océanologie de Marseill. Laboratoire de Microbiologie, Géochimie et Ecologie Marines; Francia Fil: Gilbert, Franck. Centre National de la Recherche Scientifique. Laboratoire d’Ecologie Fonctionnelle et Environnement; Francia. Université de Toulouse. Laboratoire d’Ecologie Fonctionnelle et Environnement; Francia
Published: 2012
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18. Characterization of specificity of bacterial community structure within the burrow environment of the marine polychaete Hediste (Nereis) diversicolor

Author: Laura Pischedda, Cécile Militon, Franck Gilbert, Philippe Cuny, Centre National de la Recherche Scientifique - CNRS (FRANCE), Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE), Université Toulouse III - Paul Sabatier - UT3 (FRANCE), Université de la Méditerranée - Aix-Marseille II (FRANCE), Laboratoire de MicrobiologiE de Géochimie et d'Ecologie Marines (LMGEM), Centre National de la Recherche Scientifique (CNRS)-Université de la Méditerranée - Aix-Marseille 2, 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 de MicrobiologiE de Géochimie et d'Ecologie Marines ( LMGEM ), Centre National de la Recherche Scientifique ( CNRS ) -Université de la Méditerranée - Aix-Marseille 2, Laboratoire Ecologie Fonctionnelle et Environnement - ECOLAB ( ECOLAB ), Institut National Polytechnique [Toulouse] ( INP ) -Université Paul Sabatier - Toulouse 3 ( UPS ) -Observatoire Midi-Pyrénées ( OMP ) -Centre National de la Recherche Scientifique ( CNRS ), Université de la Méditerranée - Aix-Marseille 2-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), and Institut National Polytechnique de Toulouse - INPT (FRANCE)
Subjects: [ SDU.OCEAN ] Sciences of the Universe [physics]/Ocean, Atmosphere, 0106 biological sciences, DIOPATRA-CUPREA, Geologic Sediments, PLANAR OPTODES, Biodiversité et Ecologie, Biodiversity, 01 natural sciences, Océan, Atmosphère, RNA, Ribosomal, 16S, INORGANIC NITROGEN EXCHANGE, REACTION-RATES, [SDU.OCEAN]Sciences of the Universe [physics]/Ocean, Atmosphere, 0303 health sciences, biology, Ecology, Community structure, General Medicine, musculoskeletal system, Anoxic waters, Bacterial communities, ORGANIC-MATTER, Hediste diversicolor, ARENICOLA-MARINA, Bioturbation, Hediste diversicolor burrow, Molecular Sequence Data, Callianassa subterranea, Bacterial Physiological Phenomena, Microbiology, CALLIANASSA-SUBTERRANEA, Sediments, 03 medical and health sciences, parasitic diseases, Mediterranean Sea, Animals, 14. Life underwater, Molecular Biology, Ecosystem, 030304 developmental biology, Gene Library, [ SDE.BE ] Environmental Sciences/Biodiversity and Ecology, Polychaete, Bacteria, 010604 marine biology & hydrobiology, fungi, Computational Biology, Polychaeta, Sequence Analysis, DNA, 15. Life on land, biology.organism_classification, Burrow, OXYGEN-UPTAKE, [SDE.BE]Environmental Sciences/Biodiversity and Ecology, OXIDIZING BACTERIA, MICROBIAL DIVERSITY
Abstract: Bioturbation is known to stimulate microbial communities, especially in macrofaunal burrows where the abundance and activities of bacteria are increased. Until now, these microbial communities have been poorly characterized and an important ecological question remains: do burrow walls harbor similar or specific communities compared with anoxic and surface sediments? The bacterial community structure of coastal sediments inhabited by the polychaete worm Hediste diversicolor was investigated. Surface, burrow wall and anoxic sediments were collected at the Carteau beach (Gulf of Fos, Mediterranean Sea). Bacterial diversity was determined by analyzing small subunit ribosomal RNA (16S rRNA) sequences from three clone libraries (168, 179 and 129 sequences for the surface, burrow wall and anoxic sediments, respectively). Libraries revealed 306 different operational taxonomic units (OTUs) belonging to at least 15 bacterial phyla. Bioinformatic analyses and comparisons between the three clone libraries showed that the burrow walls harbored a specific bacterial community structure which differed from the surface and anoxic environments. More similarities were nevertheless found with the surface assemblage. Inside the burrow walls, the bacterial community was characterized by high biodiversity, which probably results from the biogeochemical heterogeneity of the burrow system. (C) 2011 Institut Pasteur. Published by Elsevier Masson SAS. All rights reserved.
Published: 2011
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19. Isolation of hydrocarbon-degrading extremely halophilic archaea from an uncontaminated hypersaline pond (Camargue, France)

Author: Philippe Cuny, J.C. Bertrand, Yosmina Tapilatu, Vincent Grossi, Cécile Militon, Monique Acquaviva, Laboratoire de MicrobiologiE de Géochimie et d'Ecologie Marines (LMGEM), Université de la Méditerranée - Aix-Marseille 2-Centre National de la Recherche Scientifique (CNRS), PaleoEnvironnements et PaleobioSphere (PEPS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS), Institut National des Sciences de l'Univers (INSU), French Foreign Ministry, Laboratoire de MicrobiologiE de Géochimie et d'Ecologie Marines ( LMGEM ), Centre National de la Recherche Scientifique ( CNRS ) -Université de la Méditerranée - Aix-Marseille 2, Paléoenvironnement et paléobiosphère ( PP ), Université Claude Bernard Lyon 1 ( UCBL ), Université de Lyon-Université de Lyon-Institut national des sciences de l'Univers ( INSU - CNRS ) -Centre National de la Recherche Scientifique ( CNRS ), and Centre National de la Recherche Scientifique (CNRS)-Université de la Méditerranée - Aix-Marseille 2
Subjects: Salinity, Molecular Sequence Data, Fresh Water, Phenantrene, RNA, Archaeal, Microbiology, 03 medical and health sciences, chemistry.chemical_compound, n-Alkanes, Microbial ecology, [ SDV.MP ] Life Sciences [q-bio]/Microbiology and Parasitology, RNA, Ribosomal, 16S, Extreme environment, Haloferax, [SDV.BBM]Life Sciences [q-bio]/Biochemistry, Molecular Biology, [ SDV.BBM ] Life Sciences [q-bio]/Biochemistry, Molecular Biology, Phylogeny, 030304 developmental biology, DNA Primers, 0303 health sciences, Haloarcula, biology, Base Sequence, 030306 microbiology, General Medicine, Phenanthrene, biology.organism_classification, Archaea, Halophile, Hydrocarbons, Biodegradation, Environmental, Hypersaline ponds, [SDV.MP]Life Sciences [q-bio]/Microbiology and Parasitology, chemistry, Environmental chemistry, Halophilic, Biodegradation, Molecular Medicine, France, Crystallization, Bacteria, Fuel Oils, Water Pollutants, Chemical
Abstract: International audience; Little information exists about the ability of halophilic archaea present in hypersaline environments to degrade hydrocarbons. In order to identify the potential actors of hydrocarbon degradation in these environments, enrichment cultures were prepared using samples collected from a shallow crystallizer pond with no known contamination history in Camargue, France, with n-alkanes provided as source of carbon and energy. Five alkane-degrading halophilic archaeal strains were isolated: one (strain MSNC 2) was closely related to Haloarcula and three (strains MSNC 4, MSNC 14, and MSNC 16) to Haloferax. Biodegradation assays showed that depending on the strain, 32 to 95% (0.5 g/l) of heptadecane was degraded after 30 days of incubation at 40A degrees C in 225 g/l NaCl artificial medium. One of the strains (MSNC 14) was also able to degrade phenanthrene. This work clearly shows for the first time the potential role of halophilic archaea belonging to the genera Haloarcula and Haloferax in the degradation of hydrocarbons in both pristine and hydrocarbon-contaminated hypersaline environment
Published: 2010
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20. Response of an archaeal community from anoxic coastal marine sediments to experimental petroleum contamination

Author: Philippe Cuny, Gilles Miralles, Jean-Claude Bertrand, Monique Acquaviva, 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), and 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)
Subjects: Hydrocarbon degradation, BIODEGRADATION, Aquatic Science, 03 medical and health sciences, METHANE, Petroleum contamination, Crenarchaeota, 14. Life underwater, Sulfate-reducing bacteria, Ecology, Evolution, Behavior and Systematics, 030304 developmental biology, 0303 health sciences, biology, 030306 microbiology, Ecology, Sediment, Methanosarcina, biology.organism_classification, Anoxic waters, Archaea, ENVIRONMENTAL-SAMPLES, OIL, Anoxic coastal sediments, LONG-CHAIN ALKANES, 13. Climate action, Methanococcoides, SULFATE-REDUCING BACTERIA, Anaerobic oxidation of methane, Environmental science, HYDROCARBONS, [SDE.BE]Environmental Sciences/Biodiversity and Ecology, RESERVOIRS, ANAEROBIC OXIDATION, MICROBIAL DIVERSITY
Abstract: To achieve a better understanding of the ecological significance of Archaea in relation to petroleum contamination, we examined the composition of archaeal communities in anoxic coastal marine infralittoral sediments and their response to simulated petroleum contamination. Sediments were collected at an experimental site, and half were mixed with oil. Control and oiled sediments were then reworked into PVC cores that were inserted into the sediment at their sampling site at 20 m water depth. After 503 d of in situ incubation, molecular and statistical analyses clearly showed that petroleum contamination induced significant shifts in the composition of archaeal communities inhabiting these anoxic sediments. Overall, contamination led to a significant decrease in diversity. Control sediments were dominated by Crenarchaeota, whereas in oiled sediments,Euryarchaeota became dominant, as attested by the particular contribution of Methanococcoides, Methanosarcina, and Methanolobus sequences. Methanogens could be indirectly related to the degradation of the added hydrocarbons by participating in syntrophic consortia with hydrocarbon-degrading acetogenic bacteria. In addition, the abundance of anaerobic methane-oxidizing Archaea sequences in oiled sediments could indicate that anaerobic oxidation of methane (AOM) occurs at the depth selected for the analyses. Further studies undertaken to quantify vertical distribution of AOM, methanogenic activity, and their potential causative Archaea would help to enhance understanding of this complex petroleum-contaminated sedimentary system.
Published: 2010
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21. Influence of Chironomus riparius (Diptera, Chironomidae) and Tubifex tubifex (Annelida, Oligochaeta) on oxygen uptake by sediments. Consequences of uranium contamination

Author: Franck Gilbert, Philippe Cuny, Georges Stora, Sandra Lagauzère, Jean-Marc Bonzom, Laura Pischedda, Centre National de la Recherche Scientifique - CNRS (FRANCE), Institut National Polytechnique de Toulouse - INPT (FRANCE), Institut de Radioprotection et de Sûreté Nucléaire - IRSN (FRANCE), Université Toulouse III - Paul Sabatier - UT3 (FRANCE), Université de la Méditerranée - Aix-Marseille II (FRANCE), Laboratoire de Radioécologie et d'Ecotoxicologie (DEI/SECRE/LRE), Institut de Radioprotection et de Sûreté Nucléaire (IRSN), Laboratoire de MicrobiologiE de Géochimie et d'Ecologie Marines (LMGEM), Centre National de la Recherche Scientifique (CNRS)-Université de la Méditerranée - Aix-Marseille 2, 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), Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE), Laboratoire de Radioécologie et d'Ecotoxicologie (IRSN/DEI/SECRE/LRE), Service d'Etude du Comportement des Radionucléides dans les Ecosystèmes (IRSN/DEI/SECRE), Institut de Radioprotection et de Sûreté Nucléaire (IRSN)-Institut de Radioprotection et de Sûreté Nucléaire (IRSN), Université de la Méditerranée - Aix-Marseille 2-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), and Université de Toulouse (UT)
Subjects: 0106 biological sciences, Geologic Sediments, Water Pollutants, Radioactive, Health, Toxicology and Mutagenesis, ved/biology.organism_classification_rank.species, Fresh Water, 010501 environmental sciences, Toxicology, 01 natural sciences, Chironomidae, Sediments, Water column, Animals, Oligochaeta, Water pollution, ComputingMilieux_MISCELLANEOUS, 0105 earth and related environmental sciences, [SDV.EE]Life Sciences [q-bio]/Ecology, environment, Chironomus riparius, [SDU.OCEAN]Sciences of the Universe [physics]/Ocean, Atmosphere, Ecologie, Environnement, Freshwater macroinvertebrates, biology, Ecology, [CHIM.ORGA]Chemical Sciences/Organic chemistry, ved/biology, 010604 marine biology & hydrobiology, Sediment, General Medicine, biology.organism_classification, Pollution, Tubifex, Oxygen, Chimie organique, Diffusive oxygen uptake, Heavy metals, 13. Climate action, Tubifex tubifex, Environmental chemistry, Uranium, Bioturbation
Abstract: International audience; The diffusive oxygen uptake (DOU) of sediments inhabited by Chironomus riparius and Tubifex tubifex was investigated using a planar oxygen optode device, and complemented by measurements of bioturbation activity. Additional experiments were performed within contaminated sediments to assess the impact of uranium on these processes. After 72 h, the two invertebrate species significantly increased the DOU of sediments (13–14%), and no temporal variation occurred afterwards. Within contaminated sediments, it was already 24% higher before the introduction of the organisms, suggesting that uranium modified the sediment biogeochemistry. Although the two species firstly reacted by avoidance of contaminated sediment, they finally colonized it. Their bioturbation activity was reduced but, for T. tubifex, it remained sufficient to induce a release of uranium to the water column and an increase of the DOU (53%). These results highlight the necessity of further investigations to take into account the interactions between bioturbation, microbial metabolism and pollutants.
Published: 2009
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22. Effects of spilled Oil on Bacterial Communities of mediterranean Coastal Anoxic Chronically Subjected to oil Hydrocarbon Contamination

Author: J.C. Bertrand, Claude Manté, Philippe Cuny, Pierre Doumenq, David Nerini, Sylvie Nazaret, Monique Acquaviva, Valérie Michotey, Gilles Miralles, Laboratoire de MicrobiologiE de Géochimie et d'Ecologie Marines (LMGEM), Centre National de la Recherche Scientifique (CNRS)-Université de la Méditerranée - Aix-Marseille 2, Systèmes Chimiques Complexes - Formulation - Qualité - Environnement (SCCFQE), Centre National de la Recherche Scientifique (CNRS)-Université Paul Cézanne - Aix-Marseille 3-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Avignon Université (AU)-Université de Provence - Aix-Marseille 1-Université de la Méditerranée - Aix-Marseille 2, Centre d'océanologie de Marseille (COM), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de la Méditerranée - Aix-Marseille 2, Université de la Méditerranée - Aix-Marseille 2-Centre National de la Recherche Scientifique (CNRS), Université de la Méditerranée - Aix-Marseille 2-Université Paul Cézanne - Aix-Marseille 3-Université de Provence - Aix-Marseille 1-Avignon Université (AU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS), Université de la Méditerranée - Aix-Marseille 2-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Ecologie Microbienne - UMR 5557 (LEM), Institut National de la Recherche Agronomique (INRA)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Ecole Nationale Vétérinaire de Lyon (ENVL), and Université de Lyon-Université de Lyon-Ecole Nationale Vétérinaire de Lyon (ENVL)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Centre National de la Recherche Scientifique (CNRS)
Subjects: DNA, Bacterial, Geologic Sediments, Ribosomal Intergenic Spacer analysis, [SDV]Life Sciences [q-bio], Molecular Sequence Data, Soil Science, Biology, 03 medical and health sciences, Bioremediation, Dry weight, RNA, Ribosomal, 16S, DNA, Ribosomal Spacer, Mediterranean Sea, Water Pollutants, 14. Life underwater, Sulfate-reducing bacteria, Ecosystem, Ecology, Evolution, Behavior and Systematics, ComputingMilieux_MISCELLANEOUS, 030304 developmental biology, [SDU.OCEAN]Sciences of the Universe [physics]/Ocean, Atmosphere, 0303 health sciences, Light crude oil, Bacteria, Ecology, 030306 microbiology, Sediment, Sequence Analysis, DNA, Anoxic waters, Hydrocarbons, Oxygen, Petroleum, Microbial population biology, 13. Climate action, Environmental chemistry, Environmental Monitoring
Abstract: The effects of spilled oil on sedimentary bacterial communities were examined in situ at 20 m water depth in a Mediterranean coastal area. Sediment collected at an experimental site chronically subjected to hydrocarbon inputs was reworked into PVC cores with or without a massive addition of crude Arabian light oil ( approximately 20 g kg(-1) dry weight). Cores were reinserted into the sediment and incubated in situ at the sampling site (20 m water depth) for 135 and 503 days. The massive oil contamination induced significant shifts in the structure of the indigenous bacterial communities as shown by ribosomal intergenic spacer analysis (RISA). The vertical heterogeneity of the bacterial communities within the sediment was more pronounced in the oiled sediments particularly after 503 days of incubation. Response to oil of the deeper depth communities (8-10 cm) was slower than that of superficial depth communities (0-1 and 2-4 cm). Analysis of the oil composition by gas chromatography revealed a typical microbial alteration of n-alkanes during the experiment. Predominant RISA bands in oiled sediments were affiliated to hydrocarbonoclastic bacteria sequences. In particular, a 395-bp RISA band, which was the dominant band in all the oiled sediments for both incubation times, was closely related to hydrocarbonoclastic sulfate-reducing bacteria (SRB). These bacteria may have contributed to the main fingerprint changes and to the observed biodegradation of n-alkanes. This study provides useful information on bacterial dynamics in anoxic contaminated infralittoral sediments and highlights the need to assess more precisely the contribution of SRB to bioremediation in oil anoxic contaminated areas.
Published: 2007
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23. Impact of feeding by Arenicola marina (L.) and ageing of faecal material on fatty acid distribution and bacterial community structure in marine sediments: An experimental approach

Author: Sarah Caradec, Vincent Grossi, Richard D. Pancost, David Nerini, Franck Gilbert, Philippe Cuny, Centre National de la Recherche Scientifique - CNRS (FRANCE), University of Bristol (UNITED KINGDOM), Université de la Méditerranée - Aix-Marseille II (FRANCE), PaleoEnvironnements et PaleobioSphere (PEPS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de MicrobiologiE de Géochimie et d'Ecologie Marines (LMGEM), Université de la Méditerranée - Aix-Marseille 2-Centre National de la Recherche Scientifique (CNRS), Organic Geochemistry Unit - OGU (Bristol, United Kingdom), University of Bristol [Bristol], Institut national des sciences de l'Univers (INSU - CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), and Centre National de la Recherche Scientifique (CNRS)-Université de la Méditerranée - Aix-Marseille 2
Subjects: 0106 biological sciences, [SDE.MCG]Environmental Sciences/Global Changes, Aquatic Science, Biology, 010603 evolutionary biology, 01 natural sciences, Microbiology, Océan, Atmosphère, PUFA-producing bacteria, [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry, Feeding activity, 14. Life underwater, Food science, Arenicola marina, Fatty acids, [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces, environment, Incubation, Ecology, Evolution, Behavior and Systematics, Feces, Hydrologie, Trophic level, chemistry.chemical_classification, [SDU.OCEAN]Sciences of the Universe [physics]/Ocean, Atmosphere, [SDV.EE]Life Sciences [q-bio]/Ecology, environment, 010604 marine biology & hydrobiology, Fatty acid, biology.organism_classification, Superficial sediments, [SDV.MP]Life Sciences [q-bio]/Microbiology and Parasitology, chemistry, Microbial population biology, RISA, Arenicola, Bacterial community structure, [SDU.OTHER]Sciences of the Universe [physics]/Other, Bacteria, Polyunsaturated fatty acid
Abstract: International audience; The fate of ingested eukaryotic photoautotrophic fatty acids during gut transit in the lugwormArenicolamarina (L.) and the influence of A. marina's faeces on the evolution of fatty acid distribution and bacterial community structure in superficial sediments were studied under laboratory conditions. Dead phytoplanktonic cells (food portions) were fed to individual A. marina and subsequently incubated, or allowed to directly incubate in the presence of fresh egesta or non-ingested sediment. Changes in fatty acid composition and genetic structure of bacterial communities during gut transit and/or incubation were monitored using gas-chromatography/mass-spectrometry and a DNA fingerprint approach (RISA), respectively. Results, supported by principal component analyses, suggest that A. marina's feeding activity can directly and indirectly affect the lipid biomarker composition and the bacterial community structure of inhabited sediments. Faecal casts produced fromfood portions appeared qualitatively enriched in saturated fatty acids relative to (poly)unsaturated ones due, partly, to an increase of some bacterial fatty acids and to the preferential removal of some polyunsaturated fatty acids (PUFAs). The incubation of food portions in the presence of fresh A. marina's egesta (designed to study the indirect impact of feeding by A. marina) induced a significant increase in the concentrations of C20 and C22 polyunsaturated fatty acids (PUFAs), whereas these compounds almost disappeared following direct feeding and subsequent incubation, indicating that some dietary fatty acidsmay be more accessible to biodegradation following passage through the gut of A. marina. The aforementioned increase in PUFAs was attributed to a bacterial production during incubation, suggesting the presence of PUFA-producing bacteria in the fresh egesta of A. marina. Those bacteria were either enteric bacteria thatwere releasedwith the egesta or ingested bacteria that have survived gut passage, as suggested by the variations of the bacterial community structure (i.e. RISA profiles) during incubation. The results suggest that aged faeces from A. marina might be, in some circumstances, of relatively high nutritional value to trophic levels which are unable to synthesize essential PUFAs de novo. The presence of PUFA-producing bacteria in guts of marine lugworms deserves further attention.
Published: 2006
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23 results on '"Philippe Cuny"'

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

2. Sediment reworking by the burrowing polychaete Hediste diversicolor modulated by environmental and biological factors across the temperate North Atlantic. A tribute to Gaston Desrosiers

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

4. Fate of petroleum hydrocarbons in bioturbated pristine sediments from Caleta Valdés (Patagonia Argentina): An ex situ bioassay

5. Functional response of an adapted subtidal macrobenthic community to an oil spill: macrobenthic structure and bioturbation activity over time throughout an 18-month field experiment

6. Metatranscriptomes of oil-contaminated marine coastal sediment affected by oil addition and/or by the bioturbating activity of the marine polychaete Hediste diversicolor: Who are the microbial players?

7. Oil removal and effects of spilled oil on active microbial communities in close to salt-saturation brines

8. Oil spill effects on macrofaunal communities and bioturbation of pristine marine sediments (Caleta Valdés, Patagonia, Argentina): experimental evidence of low resistance capacities of benthic systems without history of pollution

9. Phenanthrene degradation, emulsification and surface tension activities of apseudomonas putidastrain isolated from a coastal oil contaminated microbial mat

10. Isolation of alkane-degrading bacteria from deep-sea Mediterranean sediments

11. Enhanced biodegradation of phenanthrene by a marine bacterium in presence of a synthetic surfactant

12. Comparison of the photodegradation rates of chlorophyll chlorin ring and phytol side chain in phytodetritus: is the phytyldiol versus phytol ratio (CPPI) a new biogeochemical index?

13. Effects of Hydrostatic Pressure on Growth and Luminescence of a Moderately-Piezophilic Luminous Bacteria Photobacterium phosphoreum ANT-2200

14. Impact of oil on bacterial community structure in bioturbated sediments

15. Photodegradation of chlorophyll phytyl chain in senescent leaves of higher plants

16. Water soluble phenolic compounds of the marine phanerogam Posidonia oceanica in a Mediterranean area colonised by the introduced chlorophyte Caulerpa taxifolia

17. Spatial oxygen heterogeneity in a Hediste diversicolor irrigated burrow

18. Characterization of specificity of bacterial community structure within the burrow environment of the marine polychaete Hediste (Nereis) diversicolor

19. Isolation of hydrocarbon-degrading extremely halophilic archaea from an uncontaminated hypersaline pond (Camargue, France)

20. Response of an archaeal community from anoxic coastal marine sediments to experimental petroleum contamination

21. Influence of Chironomus riparius (Diptera, Chironomidae) and Tubifex tubifex (Annelida, Oligochaeta) on oxygen uptake by sediments. Consequences of uranium contamination

22. Effects of spilled Oil on Bacterial Communities of mediterranean Coastal Anoxic Chronically Subjected to oil Hydrocarbon Contamination

23. Impact of feeding by Arenicola marina (L.) and ageing of faecal material on fatty acid distribution and bacterial community structure in marine sediments: An experimental approach

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23 results on '"Philippe Cuny"'

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