Search

Your search keyword '"Scalco, Eleonora"' showing total 43 results
Start Over Author "Scalco, Eleonora"
43 results on '"Scalco, Eleonora"'

2. Community‐Level Responses to Iron Availability in Open Ocean Plankton Ecosystems

Author

Caputi, Luigi, Carradec, Quentin, Eveillard, Damien, Kirilovsky, Amos, Pelletier, Eric, Pierella Karlusich, Juan J, Rocha Jimenez Vieira, Fabio, Villar, Emilie, Chaffron, Samuel, Malviya, Shruti, Scalco, Eleonora, Acinas, Silvia G, Alberti, Adriana, Aury, Jean‐Marc, Benoiston, Anne‐Sophie, Bertrand, Alexis, Biard, Tristan, Bittner, Lucie, Boccara, Martine, Brum, Jennifer R, Brunet, Christophe, Busseni, Greta, Carratalà, Anna, Claustre, Hervé, Coelho, Luis Pedro, Colin, Sébastien, D'Aniello, Salvatore, Da Silva, Corinne, Del Core, Marianna, Doré, Hugo, Gasparini, Stéphane, Kokoszka, Florian, Jamet, Jean‐Louis, Lejeusne, Christophe, Lepoivre, Cyrille, Lescot, Magali, Lima‐Mendez, Gipsi, Lombard, Fabien, Lukeš, Julius, Maillet, Nicolas, Madoui, Mohammed‐Amin, Martinez, Elodie, Mazzocchi, Maria Grazia, Néou, Mario B, Paz‐Yepes, Javier, Poulain, Julie, Ramondenc, Simon, Romagnan, Jean‐Baptiste, Roux, Simon, Salvagio Manta, Daniela, Sanges, Remo, Speich, Sabrina, Sprovieri, Mario, Sunagawa, Shinichi, Taillandier, Vincent, Tanaka, Atsuko, Tirichine, Leila, Trottier, Camille, Uitz, Julia, Veluchamy, Alaguraj, Veselá, Jana, Vincent, Flora, Yau, Sheree, Kandels‐Lewis, Stefanie, Searson, Sarah, Dimier, Céline, Picheral, Marc, Bork, Peer, Boss, Emmanuel, Vargas, Colomban, Follows, Michael J, Grimsley, Nigel, Guidi, Lionel, Hingamp, Pascal, Karsenti, Eric, Sordino, Paolo, Stemmann, Lars, Sullivan, Matthew B, Tagliabue, Alessandro, Zingone, Adriana, Garczarek, Laurence, d'Ortenzio, Fabrizio, Testor, Pierre, Not, Fabrice, d'Alcalà, Maurizio Ribera, Wincker, Patrick, Bowler, Chris, Iudicone, Daniele, Gorsky, Gabriel, and Jaillon, Olivier

Subjects
Genetics, Life Below Water, Atmospheric Sciences, Geochemistry, Oceanography, Meteorology & Atmospheric Sciences
Abstract

Predicting responses of plankton to variations in essential nutrients is hampered by limited in situ measurements, a poor understanding of community composition, and the lack of reference gene catalogs for key taxa. Iron is a key driver of plankton dynamics and, therefore, of global biogeochemical cycles and climate. To assess the impact of iron availability on plankton communities, we explored the comprehensive bio-oceanographic and bio-omics data sets from Tara Oceans in the context of the iron products from two state-of-the-art global scale biogeochemical models. We obtained novel information about adaptation and acclimation toward iron in a range of phytoplankton, including picocyanobacteria and diatoms, and identified whole subcommunities covarying with iron. Many of the observed global patterns were recapitulated in the Marquesas archipelago, where frequent plankton blooms are believed to be caused by natural iron fertilization, although they are not captured in large-scale biogeochemical models. This work provides a proof of concept that integrative analyses, spanning from genes to ecosystems and viruses to zooplankton, can disentangle the complexity of plankton communities and can lead to more accurate formulations of resource bioavailability in biogeochemical models, thus improving our understanding of plankton resilience in a changing environment.

Published
2019

3. Global Trends in Marine Plankton Diversity across Kingdoms of Life

Author

Acinas, Silvia G., Babin, Marcel, Bork, Peer, Boss, Emmanuel, Bowler, Chris, Cochrane, Guy, de Vargas, Colomban, Follows, Mick, Gorsky, Gabriel, Grimsley, Nigel, Guidi, Lionel, Hingamp, Pascal, Iudicone, Daniele, Jaillon, Olivier, Kandels, Stefanie, Karp-Boss, Lee, Karsenti, Eric, Not, Fabrice, Ogata, Hiroyuki, Pesant, Stéphane, Poulton, Nicole, Raes, Jeroen, Sardet, Christian, Speich, Sabrina, Stemmann, Lars, Sullivan, Matthew B., Sunagawa, Shinichi, Wincker, Patrick, Ibarbalz, Federico M., Henry, Nicolas, Brandão, Manoela C., Martini, Séverine, Busseni, Greta, Byrne, Hannah, Coelho, Luis Pedro, Endo, Hisashi, Gasol, Josep M., Gregory, Ann C., Mahé, Frédéric, Rigonato, Janaina, Royo-Llonch, Marta, Salazar, Guillem, Sanz-Sáez, Isabel, Scalco, Eleonora, Soviadan, Dodji, Zayed, Ahmed A., Zingone, Adriana, Labadie, Karine, Ferland, Joannie, Marec, Claudie, Picheral, Marc, Dimier, Céline, Poulain, Julie, Pisarev, Sergey, Carmichael, Margaux, Pelletier, Eric, Bopp, Laurent, Lombard, Fabien, and Zinger, Lucie

Published
2019
Full Text
View/download PDF

4. Factors regulating transitions among life cycle phases in the marine pennate diatom Pseudo-nitzschia multistriata

Author

Scalco, Eleonora

Subjects
579.85
Abstract

The marine pennate diatom Pseudo-nitzschia multistriata has a heterothallic life cycle and the two mating types ('+' and '-') need to be in contact to allow sexual reproduction to occur. In this thesis, results 'are presented of an investigation using con focal and time lapse microscopy aimed at describing the different stages of the life cycle of this species. Results are also presented of various experiments aimed at defining the endogenous and exogenous factors that induce sexual, reproduction. Parental strains need to reach a certain cell density before undergoing sexual reproduction and an inverse correlation was observed between the inoculum size and the time required for the induction of sexual reproduction. This suggests that sexual reproduction is a density-dependent event, regulated by a chemical mediator. Support for this latter hypothesis was provided by experiments on single parental strains which underwent gametogenesis and formation of gametes when exposed to culture medium conditioned by the growth of the opposite mating type. Other support was provided by the fact that sexual reproduction was considerably reduced in cultures incubated in mixed conditions versus still ones. In the latter experimental setting, cells could settle to the bottom, therefore increasing their density and facilitating the onset of the sexual phase. Evidence was also obtained to support the hypothesis that chemical compounds produced during sexual reproduction might reduce the growth of parental strains. The results obtained in the project have provided novel insights into the mechanisms that regulate the life cycle of this planktonic diatom, showing that the transition from vegetative to sexual phase is regulated by chemical mediators. This information represents an experimental background that will allow future studies, aimed at the characterization of the chemical signalling molecules and/or at molecular investigation, to characterize the genes involved in the different life phases.

Published
2012
Full Text
View/download PDF

7. Pan-Arctic plankton community structure and its global connectivity

Author

Ibarbalz, Federico M., Henry, Nicolas, Mahe, Frédéric, Ardyna, Mathieu, Zingone, Adriana, Scalco, Eleonora, Lovejoy, Thomas E., Lombard, Fabien, Jaillon, Olivier, Iudicone, Daniele, Malviya, Shruti, Sullivan, Matthew B., Chaffron, Samuel, Karsenti, Eric, Babin, Marcel, Boss, Emmanuel, Wincker, Patrick, Zinger, Lucie, de Vargas, Colomban, Bowler, Chris, Karp-Boss, Lee, Ibarbalz, Federico M., Henry, Nicolas, Mahe, Frédéric, Ardyna, Mathieu, Zingone, Adriana, Scalco, Eleonora, Lovejoy, Thomas E., Lombard, Fabien, Jaillon, Olivier, Iudicone, Daniele, Malviya, Shruti, Sullivan, Matthew B., Chaffron, Samuel, Karsenti, Eric, Babin, Marcel, Boss, Emmanuel, Wincker, Patrick, Zinger, Lucie, de Vargas, Colomban, Bowler, Chris, and Karp-Boss, Lee

Abstract

The Arctic Ocean (AO) is being rapidly transformed by global warming, but its biodiversity remains understudied for many planktonic organisms, in particular for unicellular eukaryotes that play pivotal roles in marine food webs and biogeochemical cycles. The aim of this study was to characterize the biogeographic ranges of species that comprise the contemporary pool of unicellular eukaryotes in the AO as a first step toward understanding mechanisms that structure these communities and identifying potential target species for monitoring. Leveraging the Tara Oceans DNA metabarcoding data, we mapped the global distributions of operational taxonomic units (OTUs) found on Arctic shelves into five biogeographic categories, identified biogeographic indicators, and inferred the degree to which AO communities of unicellular eukaryotes share members with assemblages from lower latitudes. Arctic/Polar indicator OTUs, as well as some globally ubiquitous OTUs, dominated the detection and abundance of DNA reads in the Arctic samples. OTUs detected only in Arctic samples (Arctic-exclusives) showed restricted distribution with relatively low abundances, accounting for 10–16% of the total Arctic OTU pool. OTUs with high abundances in tropical and/or temperate latitudes (non-Polar indicators) were also found in the AO but mainly at its periphery. We observed a large change in community taxonomic composition across the Atlantic-Arctic continuum, supporting the idea that advection and environmental filtering are important processes that shape plankton assemblages in the AO. Altogether, this study highlights the connectivity between the AO and other oceans, and provides a framework for monitoring and assessing future changes in this vulnerable ecosystem.

Published
2023

8. A robust approach to estimate relative phytoplankton cell abundances from metagenomes

Author

European Commission, Fonds Français pour l'Environnement Mondial, Université Paris Sciences & Lettres, Agencia Estatal de Investigación (España), Pierella Karlusich, Juan J., Pelletier, Eric, Zinger, Lucie, Lombard, Fabien, Zingone, Adriana, Colin, Sebastien, Gasol, Josep M., Dorrell, Richard G., Henry, Nicolas, Scalco, Eleonora, Acinas, Silvia G., Wincker, Patrick, Vargas, Colomban de, Bowler, Chris, European Commission, Fonds Français pour l'Environnement Mondial, Université Paris Sciences & Lettres, Agencia Estatal de Investigación (España), Pierella Karlusich, Juan J., Pelletier, Eric, Zinger, Lucie, Lombard, Fabien, Zingone, Adriana, Colin, Sebastien, Gasol, Josep M., Dorrell, Richard G., Henry, Nicolas, Scalco, Eleonora, Acinas, Silvia G., Wincker, Patrick, Vargas, Colomban de, and Bowler, Chris

Abstract

Phytoplankton account for >45% of global primary production, and have an enor-mous impact on aquatic food webs and on the entire Earth System. Their members are found among prokaryotes (cyanobacteria) and multiple eukaryotic lineages con-taining chloroplasts. Genetic surveys of phytoplankton communities generally consist of PCR amplification of bacterial (16S), nuclear (18S) and/or chloroplastic (16S) rRNA marker genes from DNA extracted from environmental samples. However, our appre-ciation of phytoplankton abundance or biomass is limited by PCR-amplification biases, rRNA gene copy number variations across taxa, and the fact that rRNA genes do not provide insights into metabolic traits such as photosynthesis. Here, we targeted the photosynthetic gene psbO from metagenomes to circumvent these limitations: the method is PCR-free, and the gene is universally and exclusively present in photosyn-thetic prokaryotes and eukaryotes, mainly in one copy per genome. We applied and validated this new strategy with the size-fractionated marine samples collected by Tara Oceans, and showed improved correlations with flow cytometry and microscopy than when based on rRNA genes. Furthermore, we revealed unexpected features of the ecology of these ecosystems, such as the high abundance of picocyanobacterial aggregates and symbionts in the ocean, and the decrease in relative abundance of phototrophs towards the larger size classes of marine dinoflagellates. To facilitate the incorporation of psbO in molecular- based surveys, we compiled a curated database of >18,000 unique sequences. Overall, psbO appears to be a promising new gene marker for molecular- based evaluations of entire phytoplankton communities

Published
2023

12. A robust approach to estimate relative phytoplankton cell abundances from metagenomes

Author

Pierella Karlusich, Juan José, primary, Pelletier, Eric, additional, Zinger, Lucie, additional, Lombard, Fabien, additional, Zingone, Adriana, additional, Colin, Sébastien, additional, Gasol, Josep M., additional, Dorrell, Richard G., additional, Henry, Nicolas, additional, Scalco, Eleonora, additional, Acinas, Silvia G., additional, Wincker, Patrick, additional, de Vargas, Colomban, additional, and Bowler, Chris, additional

Published
2022
Full Text
View/download PDF

14. A robust approach to estimate relative phytoplankton cell abundances from metagenomes.

Author

Pierella Karlusich, Juan José, Pelletier, Eric, Zinger, Lucie, Lombard, Fabien, Zingone, Adriana, Colin, Sébastien, Gasol, Josep M., Dorrell, Richard G., Henry, Nicolas, Scalco, Eleonora, Acinas, Silvia G., Wincker, Patrick, de Vargas, Colomban, and Bowler, Chris

Subjects
PRIMARY productivity (Biology), EUKARYOTES, ENVIRONMENTAL sampling, FLOW cytometry, BIOMASS, RIBOSOMAL RNA, DNA, PHYTOPLANKTON
Abstract

Phytoplankton account for >45% of global primary production, and have an enormous impact on aquatic food webs and on the entire Earth System. Their members are found among prokaryotes (cyanobacteria) and multiple eukaryotic lineages containing chloroplasts. Genetic surveys of phytoplankton communities generally consist of PCR amplification of bacterial (16S), nuclear (18S) and/or chloroplastic (16S) rRNA marker genes from DNA extracted from environmental samples. However, our appreciation of phytoplankton abundance or biomass is limited by PCR‐amplification biases, rRNA gene copy number variations across taxa, and the fact that rRNA genes do not provide insights into metabolic traits such as photosynthesis. Here, we targeted the photosynthetic gene psbO from metagenomes to circumvent these limitations: the method is PCR‐free, and the gene is universally and exclusively present in photosynthetic prokaryotes and eukaryotes, mainly in one copy per genome. We applied and validated this new strategy with the size‐fractionated marine samples collected by Tara Oceans, and showed improved correlations with flow cytometry and microscopy than when based on rRNA genes. Furthermore, we revealed unexpected features of the ecology of these ecosystems, such as the high abundance of picocyanobacterial aggregates and symbionts in the ocean, and the decrease in relative abundance of phototrophs towards the larger size classes of marine dinoflagellates. To facilitate the incorporation of psbO in molecular‐based surveys, we compiled a curated database of >18,000 unique sequences. Overall, psbO appears to be a promising new gene marker for molecular‐based evaluations of entire phytoplankton communities. see also the Perspective by Georgina L. Brennan [ABSTRACT FROM AUTHOR]

Published
2023
Full Text
View/download PDF

15. A robust approach to estimate relative phytoplankton cell abundance from metagenomes

Author

Karlusich, Juan José Pierella, primary, Pelletier, Eric, additional, Zinger, Lucie, additional, Lombard, Fabien, additional, Zingone, Adriana, additional, Colin, Sébastien, additional, Gasol, Josep M., additional, Dorrell, Richard G., additional, Scalco, Eleonora, additional, Acinas, Silvia G., additional, Wincker, Patrick, additional, de Vargas, Colomban, additional, and Bowler, Chris, additional

Published
2021
Full Text
View/download PDF

16. Large scale patterns of marine diatom richness: Drivers and trends in a changing ocean

Author

Busseni, Greta, primary, Caputi, Luigi, additional, Piredda, Roberta, additional, Fremont, Paul, additional, Hay Mele, Bruno, additional, Campese, Lucia, additional, Scalco, Eleonora, additional, de Vargas, Colomban, additional, Bowler, Chris, additional, d'Ovidio, Francesco, additional, Zingone, Adriana, additional, Ribera d’Alcalà, Maurizio, additional, and Iudicone, Daniele, additional

Published
2020
Full Text
View/download PDF

17. Global Trends in Marine Plankton Diversity across Kingdoms of Life

Author

Ibarbalz, Federico, Henry, Nicolas, Brandão, Manoela, Martini, Severine, Busseni, Greta, Byrne, Hannah, Coelho, Luis Pedro, Endo, Hisashi, Gasol, Josep, Gregory, Ann, Mahé, Frédéric, Rigonato, Janaina, Royo-Llonch, Marta, Salazar, Guillem, Sanz-Sáez, Isabel, Scalco, Eleonora, Soviadan, Dodji, Zayed, Ahmed, Zingone, Adriana, Labadie, Karine, Ferland, Joannie, Marec, Claudie, Kandels, Stefanie, Picheral, Marc, Dimier, Céline, Poulain, Julie, Pisarev, Sergey, Carmichael, Margaux, Pesant, Stéphane, Babin, Marcel, Boss, Emmanuel, Iudicone, Daniele, Jaillon, Olivier, Acinas, Silvia, Ogata, Hiroyuki, Pelletier, Eric, Stemmann, Lars, Sullivan, Matthew, Sunagawa, Shinichi, Bopp, Laurent, de Vargas, Colomban, Karp-Boss, Lee, Wincker, Patrick, Lombard, Fabien, Bowler, Chris, Follows, Mick, Zinger, Lucie, Institut de biologie de l'ENS Paris (IBENS), Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Département de Biologie - ENS Paris, École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Adaptation et diversité en milieu marin (AD2M), Station biologique de Roscoff (SBR), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'océanographie de Villefranche (LOV), Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut de la Mer de Villefranche (IMEV), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Takuvik Joint International Laboratory ULAVAL-CNRS, Université Laval [Québec] (ULaval)-Centre National de la Recherche Scientifique (CNRS), Institut de biologie de l'ENS Paris (UMR 8197/1024) (IBENS), Département de Biologie - ENS Paris, and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[SDE.BE]Environmental Sciences/Biodiversity and Ecology, ComputingMilieux_MISCELLANEOUS, [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography
Abstract

International audience

Published
2019
Full Text
View/download PDF

18. Global Trends in Marine Plankton Diversity across Kingdoms of Life

Author

Ibarbalz, Federico M, Henry, Nicolas, Brandao, Manoela C, Martini, Verine, Busseni, Greta, Byrne, Hannah, Coelho, Luis Pedro, Endo, Hisashi, Gasol, Josep M, Gregory, Ann C, Mahe, Frederic, Rigonato, Janaina, Royo-Llonch, Marta, Salazar, Guillem, Sanz-Saez, Isabel, Scalco, Eleonora, Soviadan, Dodji, Zayed, Ahmed A, Zingone, Adriana, Labadie, Karine, Ferland, Joannie, Marec, Claudie, Kandels, Stefanie, Picheral, Marc, Dimier, Celine, Poulain, Julie, Pisarev, Sergey, Carmichael, Margaux, Pesant, Stephane, Acinas, Silvia G, Babin, Marcel, Bork, Peer, Boss, Emmanuel, Bowler, Chris, Cochrane, Guy, de Vargas, Colomban, Follows, Mick, Gorsky, Gabriel, Grimsley, Nigel, Guidi, Lionel, Hingamp, Pascal, Iudicone, Daniele, Jaillon, Olivier, Karp-Boss, Lee, Karsenti, Eric, Not, Fabrice, Ogata, Hiroyuki, Poulton, Nicole, Raes, Jeroen, Sardet, Christian, Speich, Sabrina, Stemmann, Lars, Sullivan, Matthew B, Sunagawa, Shinichi, Wincker, Patrick, Bopp, Laurent, Lombard, Fabien, and Zinger, Lucie

Subjects
Biochemistry & Molecular Biology, Science & Technology, CLIMATE-CHANGE, fungi, Cell Biology, ECOLOGY, LATITUDINAL GRADIENTS, OCEAN, PHYTOPLANKTON, PATTERNS, DISTRIBUTIONS, BIODIVERSITY, Life Sciences & Biomedicine, TEMPERATURE, human activities, MICROBIAL DIVERSITY
Abstract

The ocean is home to myriad small planktonic organisms that underpin the functioning of marine ecosystems. However, their spatial patterns of diversity and the underlying drivers remain poorly known, precluding projections of their responses to global changes. Here we investigate the latitudinal gradients and global predictors of plankton diversity across archaea, bacteria, eukaryotes, and major virus clades using both molecular and imaging data from Tara Oceans. We show a decline of diversity for most planktonic groups toward the poles, mainly driven by decreasing ocean temperatures. Projections into the future suggest that severe warming of the surface ocean by the end of the 21st century could lead to tropicalization of the diversity of most planktonic groups in temperate and polar regions. These changes may have multiple consequences for marine ecosystem functioning and services and are expected to be particularly significant in key areas for carbon sequestration, fisheries, and marine conservation. VIDEO ABSTRACT. ispartof: CELL vol:179 issue:5 pages:1084-+ ispartof: location:United States status: published

Published
2019

19. Community-Level Responses to Iron Availability in Open Ocean Plankton Ecosystems

Author

Karp‐Boss, Lee, Wincker, Patrick, Kandels‐Lewis, Stefanie, Jaillon, Olivier, Iudicone, Daniele, Hingamp, Pascal, Grimsley, Nigel, Gorsky, Gabriel, Follows, Michael J., Vargas, Colomban, Bowler, Chris, Boss, Emmanuel, Bork, Peer, Acinas, Silvia G., Karsenti, Eric, Weissenbach, Jean, Velayoudon, Didier, Sunagawa, Shinichi, Sullivan, Matthew B., Stemmann, Lars, Speich, Sabrina, Sieracki, Mike, Sardet, Christian, Reynaud, Emmanuel G., Raes, Jeroen, Pesant, Stéphane, Ogata, Hiroyuki, Not, Fabrice, Krzic, Uros, Caputi, Luigi, Carradec, Quentin, Eveillard, Damien, Kirilovsky, Amos, Pelletier, Eric, Pierella Karlusich, Juan J., Rocha Jimenez Vieira, Fabio, Villar, Emilie, Chaffron, Samuel, Malviya, Shruti, Scalco, Eleonora, Alberti, Adriana, Aury, Jean‐Marc, Benoiston, Anne‐Sophie, Bertrand, Alexis, Biard, Tristan, Bittner, Lucie, Boccara, Martine, Brum, Jennifer R., Brunet, Christophe, Busseni, Greta, Carratalà, Anna, Claustre, Hervé, Coelho, Luis Pedro, Colin, Sébastien, D'Aniello, Salvatore, Da Silva, Corinne, Del Core, Marianna, Doré, Hugo, Gasparini, Stéphane, Kokoszka, Florian, Jamet, Jean‐Louis, Lejeusne, Christophe, Lepoivre, Cyrille, Lescot, Magali, Lima‐Mendez, Gipsi, Lombard, Fabien, Lukeš, Julius, Maillet, Nicolas, Madoui, Mohammed‐Amin, Martinez, Elodie, Mazzocchi, Maria Grazia, Néou, Mario B., Paz‐Yepes, Javier, Poulain, Julie, Ramondenc, Simon, Romagnan, Jean‐Baptiste, Roux, Simon, Salvagio Manta, Daniela, Sanges, Remo, Sprovieri, Mario, Taillandier, Vincent, Tanaka, Atsuko, Tirichine, Leila, Trottier, Camille, Uitz, Julia, Veluchamy, Alaguraj, Veselá, Jana, Vincent, Flora, Yau, Sheree, Searson, Sarah, Dimier, Céline, Picheral, Marc, Guidi, Lionel, Sordino, Paolo, Tagliabue, Alessandro, Zingone, Adriana, Garczarek, Laurence, d'Ortenzio, Fabrizio, Testor, Pierre, d'Alcalà, Maurizio Ribera, Stazione Zoologica Anton Dohrn (SZN), Génomique métabolique (UMR 8030), Genoscope - Centre national de séquençage [Evry] (GENOSCOPE), Université Paris-Saclay-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université d'Évry-Val-d'Essonne (UEVE)-Centre National de la Recherche Scientifique (CNRS), Laboratoire des Sciences du Numérique de Nantes (LS2N), Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), Université de Nantes (UN)-Université de Nantes (UN)-École Centrale de Nantes (ECN)-Centre National de la Recherche Scientifique (CNRS)-IMT Atlantique (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT), Combinatoire et Bioinformatique (LS2N - équipe COMBI), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), Institut de biologie de l'ENS Paris (IBENS), Département de Biologie - ENS Paris, École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Diversité et Interactions au sein du Plancton Océanique (DIPO), Adaptation et diversité en milieu marin (ADMM), Institut national des sciences de l'Univers (INSU - CNRS)-Station biologique de Roscoff (SBR), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Station biologique de Roscoff (SBR), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Swiss Institute of Bioinformatics [Lausanne] (SIB), Université de Lausanne = University of Lausanne (UNIL), Institute of Marine Sciences / Institut de Ciències del Mar [Barcelona] (ICM), Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), Istituto per la Microelettronica e Microsistemi [Catania] (IMM), National Research Council of Italy | Consiglio Nazionale delle Ricerche (CNR), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Department of Oceanography and Coastal Sciences, Louisiana State University (LSU), Laboratoire d'océanographie de Villefranche (LOV), Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut de la Mer de Villefranche (IMEV), Instituto de Engenharia de Sistemas e Computadores (INESC), Departament de Genetica, Facultat de Biologia, Universitat de Barcelona (UB), 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 de biodiversité et d'écologie marine et continentale (IMBE), Avignon Université (AU)-Aix Marseille Université (AMU)-Institut de recherche pour le développement [IRD] : UMR237-Centre National de la Recherche Scientifique (CNRS), Information génomique et structurale (IGS), Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS), Czech Academy of Sciences [Prague] (CAS), Laboratoire Microorganismes : Génome et Environnement (LMGE), Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Centre National de la Recherche Scientifique (CNRS), Istituto per l'Ambiente Marino Costiero, Sezione Ecologia Marina Integrata, European Molecular Biology Laboratory [Heidelberg] (EMBL), National Cardiovascular Center, Biologie intégrative des organismes marins (BIOM), Observatoire océanologique de Banyuls (OOB), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Department of Oceanography [Honolulu], University of Hawai‘i [Mānoa] (UHM), University of Maine, Department of Earth and Environment [Boston], Boston University [Boston] (BU), Department of Earth Ocean and Ecological Sciences [Liverpool], University of Liverpool, Variabilité de l'Océan et de la Glace de mer (VOG), Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN), Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Data Publisher for Earth and Environmental Science (PANGAEA), University of Bremen, National Science Foundation [Arlington] (NSF), DVIPC, ANR-17-CE02-0014,CINNAMON,Analyse multi-échelle de l'adaptation à la carence en Fer chez un organisme clé du phytoplancton marin, dans un contexte de changement global(2017), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-Université d'Évry-Val-d'Essonne (UEVE), Université de Nantes (UN)-Université de Nantes (UN)-École Centrale de Nantes (ECN)-Centre National de la Recherche Scientifique (CNRS)-IMT Atlantique Bretagne-Pays de la Loire (IMT Atlantique), Combinatoire et Bioinformatique (COMBI), Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Département de Biologie - ENS Paris, École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Adaptation et diversité en milieu marin (AD2M), Station biologique de Roscoff (SBR), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Station biologique de Roscoff (SBR), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Université de Lausanne (UNIL), Consiglio Nazionale delle Ricerche (CNR), Centre National de la Recherche Scientifique (CNRS)-Institut de recherche pour le développement [IRD] : UMR237-Aix Marseille Université (AMU)-Avignon Université (AU), Consiglio Nazionale delle Ricerche [Roma] (CNR), Observatoire océanologique de Villefranche-sur-mer (OOVM), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS), Institut Pierre-Simon-Laplace (IPSL (FR_636)), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)-Institut de Recherche pour le Développement (IRD)-Muséum national d'Histoire naturelle (MNHN)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Institut Pierre-Simon-Laplace (IPSL (FR_636)), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)-Institut de Recherche pour le Développement (IRD)-Muséum national d'Histoire naturelle (MNHN)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU), Institut de Biologie François JACOB (JACOB), Direction de Recherche Fondamentale (CEA) (DRF (CEA)), IMT Atlantique Bretagne-Pays de la Loire (IMT Atlantique), Université de Nantes (UN)-Université de Nantes (UN)-École Centrale de Nantes (ECN)-Centre National de la Recherche Scientifique (CNRS), Institut de biologie de l'ENS Paris (UMR 8197/1024) (IBENS), Centre National de la Recherche Scientifique (CNRS)-Station biologique de Roscoff (SBR), ECOlogy of MArine Plankton (ECOMAP), Vrije Universiteit Brussel (VUB), Department of Structural Biology, Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Sorbonne Université (SU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut Pierre-Simon-Laplace (IPSL (FR_636)), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)-Sorbonne Université (SU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut Pierre-Simon-Laplace (IPSL (FR_636)), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), UCL - SST/LIBST - Louvain Institute of Biomolecular Science and Technology, Gordon and Betty Moore Foundation, Fondation Prince Albert II de Monaco, National Science Foundation (US), Stazione Zoologica Anton Dohrn, National Fund for Scientific Research (Belgium), Centre National de la Recherche Scientifique (France), Région Bretagne, and JAMET, Jean-Louis

Subjects
0106 biological sciences, Atmospheric Science, PROCHLOROCOCCUS, 010504 meteorology & atmospheric sciences, Iron fertilization, species networks, DIVERSITY, PROTEIN, Oceanography, 01 natural sciences, CARBON, Settore BIO/13 - Biologia Applicata, oxidative stress, Meteorology & Atmospheric Sciences, Geosciences, Multidisciplinary, OXIDATIVE STRESS, ComputingMilieux_MISCELLANEOUS, GENE-EXPRESSION, General Environmental Science, Global and Planetary Change, LIMITATION, Ecology, IN-SITU, system biology, Geology, Plankton, [SDV.BIBS]Life Sciences [q-bio]/Quantitative Methods [q-bio.QM], iron response, meta-omics, MARINE-PHYTOPLANKTON, in-situ, limitation, Physical Sciences, Life Sciences & Biomedicine, Biogeochemical cycle, PACIFIC, Environmental Sciences & Ecology, Context (language use), prochlorococcus, Biology, Zooplankton, marine-phytoplankton, diversity, Atmospheric Sciences, Phytoplankton, pacific, Genetics, Environmental Chemistry, Ecosystem, 14. Life underwater, Life Below Water, 0105 earth and related environmental sciences, Science & Technology, 010604 marine biology & hydrobiology, carbon, fungi, Pelagic zone, gene-expression, [SDE.BE] Environmental Sciences/Biodiversity and Ecology, Geochemistry, Cardiovascular and Metabolic Diseases, [INFO.INFO-BI]Computer Science [cs]/Bioinformatics [q-bio.QM], [SDE.BE]Environmental Sciences/Biodiversity and Ecology, protein, Environmental Sciences, [SDV.EE.IEO]Life Sciences [q-bio]/Ecology, environment/Symbiosis
Abstract

29 pages, 9 figures, supporting information https://doi.org/10.1029/2018GB006022, Predicting responses of plankton to variations in essential nutrients is hampered by limited in situ measurements, a poor understanding of community composition, and the lack of reference gene catalogs for key taxa. Iron is a key driver of plankton dynamics and, therefore, of global biogeochemical cycles and climate. To assess the impact of iron availability on plankton communities, we explored the comprehensive bio‐oceanographic and bio‐omics data sets from Tara Oceans in the context of the iron products from two state‐of‐the‐art global scale biogeochemical models. We obtained novel information about adaptation and acclimation toward iron in a range of phytoplankton, including picocyanobacteria and diatoms, and identified whole subcommunities covarying with iron. Many of the observed global patterns were recapitulated in the Marquesas archipelago, where frequent plankton blooms are believed to be caused by natural iron fertilization, although they are not captured in large‐scale biogeochemical models. This work provides a proof of concept that integrative analyses, spanning from genes to ecosystems and viruses to zooplankton, can disentangle the complexity of plankton communities and can lead to more accurate formulations of resource bioavailability in biogeochemical models, thus improving our understanding of plankton resilience in a changing environment, We thank the commitment of the following people and sponsors who made this singular expedition possible: CNRS (in particular Groupement de Recherche GDR3280, the Mission Pour l'Interdisciplinarité – Project MEGALODOM, and the Fédération de Recherche GO‐SEE FR2022), European Molecular Biology Laboratory (EMBL), Genoscope/CEA, the French Government “Investissements d'Avenir” programs Oceanomics (ANR‐11‐BTBR‐0008), MEMO LIFE (ANR‐10‐LABX‐54), PSL* Research University (ANR‐11‐IDEX‐0001‐02), and FRANCE GENOMIQUE (ANR‐10‐INBS‐09), Fund for Scientific Research – Flanders, VIB, Stazione Zoologica Anton Dohrn, UNIMIB, ANR (projects “PHYTBACK/ANR‐2010‐1709‐01,” POSEIDON/ANR‐09‐BLAN‐0348, PROMETHEUS/ANR‐09‐PCS‐GENM‐217, TARA‐GIRUS/ANR‐09‐PCS‐GENM‐218, SAMOSA/ANR‐13‐ADAP‐0010, CINNAMON/ANR‐17‐CE02‐0014‐01), EU FP7 (MicroB3/No. 287589), ERC Advanced Grant Award (Diatomite: 294823), the LouisD foundation of the Institut de France, a Radcliffe Institute Fellowship from Harvard University to C. B., JSPS/MEXT KAKENHI (26430184, 16H06437, and 16KT0020), The Canon Foundation (203143100025), Gordon and Betty Moore Foundation (award #3790) and the US National Science Foundation (awards OCE#1536989 and OCE#1829831) to MBS, agnès b., the Veolia Environment Foundation, Region Bretagne, World Courier, Illumina, Cap L'Orient, the EDF Foundation EDF Diversiterre, FRB, the Prince Albert II de Monaco Foundation, Etienne Bourgois, the Fonds Français pour l'Environnement Mondial, the TARA schooner and its captain and crew.

Published
2019
Full Text
View/download PDF

20. Global trends in marine plankton diversity across kingdoms of life

Author

Ibarbalz, Federico M., Henry, Nicolas, Martini, Séverine, Busseni, Greta, Byme, Hannah, Coelho, Luis Pedro, Endo, Hisashi, Gasol, Josep M., Gregory, Ann C., Mahé, Frédéric, Rigonato, Janaina, Royo-Llonch, Marta, Salazar, Guillem, Sanz-Sáez, Isabel, Scalco, Eleonora, Soviadan, Dodji, Zayed, Ahmed A., Zingone, Adriana, Labadie, Karine, and Ferland, Joannie

Subjects
Changement climatique, P40 - Météorologie et climatologie, fungi, Impact sur l'environnement, Écosystème marin, Plancton, Conservation de la diversité biologique, M40 - Écologie aquatique, Biodiversité, Réchauffement global, human activities
Abstract

The ocean is home to myriad small planktonic organisms that underpin the functioning of marine ecosystems. However, their spatial patterns of diversity and the underlying drivers remain poorly known, precluding projections of their responses to global changes. Here we investigate the latitudinal gradients and global predictors of plankton diversity across archaea, bacteria, eukaryotes, and major virus clades using both molecular and imaging data from Tara Oceans. We show a decline of diversity for most planktonic groups toward the poles, mainly driven by decreasing ocean temperatures. Projections into the future suggest that severe warming of the surface ocean by the end of the 21st century could lead to tropicalization of the diversity of most planktonic groups in temperate and polar regions. These changes may have multiple consequences for marine ecosystem functioning and services and are expected to be particularly significant in key areas for carbon sequestration, fisheries, and marine conservation.

Published
2019

21. Global Trends in Marine Plankton Diversity across Kingdoms of Life

Author

80795055, Ibarbalz, Federico M., Henry, Nicolas, Brandão, Manoela C., Martini, Séverine, Busseni, Greta, Byrne, Hannah, Coelho, Luis Pedro, Endo, Hisashi, Gasol, Josep M., Gregory, Ann C., Mahé, Frédéric, Rigonato, Janaina, Royo-Llonch, Marta, Salazar, Guillem, Sanz-Sáez, Isabel, Scalco, Eleonora, Soviadan, Dodji, Zayed, Ahmed A., Zingone, Adriana, Labadie, Karine, Ferland, Joannie, Marec, Claudie, Kandels, Stefanie, Picheral, Marc, Dimier, Céline, Poulain, Julie, Pisarev, Sergey, Carmichael, Margaux, Pesant, Stéphane, Babin, Marcel, Boss, Emmanuel, Iudicone, Daniele, Jaillon, Olivier, Acinas, Silvia G., Ogata, Hiroyuki, Pelletier, Eric, Stemmann, Lars, Sullivan, Matthew B., Sunagawa, Shinichi, Bopp, Laurent, de Vargas, Colomban, Karp-Boss, Lee, Wincker, Patrick, Lombard, Fabien, Bowler, Chris, Zinger, Lucie, Bork, Peer, Cochrane, Guy, Follows, Mick, Gorsky, Gabriel, Grimsley, Nigel, Guidi, Lionel, Hingamp, Pascal, Karsenti, Eric, Not, Fabrice, Poulton, Nicole, Raes, Jeroen, Sardet, Christian, Speich, Sabrina, 80795055, Ibarbalz, Federico M., Henry, Nicolas, Brandão, Manoela C., Martini, Séverine, Busseni, Greta, Byrne, Hannah, Coelho, Luis Pedro, Endo, Hisashi, Gasol, Josep M., Gregory, Ann C., Mahé, Frédéric, Rigonato, Janaina, Royo-Llonch, Marta, Salazar, Guillem, Sanz-Sáez, Isabel, Scalco, Eleonora, Soviadan, Dodji, Zayed, Ahmed A., Zingone, Adriana, Labadie, Karine, Ferland, Joannie, Marec, Claudie, Kandels, Stefanie, Picheral, Marc, Dimier, Céline, Poulain, Julie, Pisarev, Sergey, Carmichael, Margaux, Pesant, Stéphane, Babin, Marcel, Boss, Emmanuel, Iudicone, Daniele, Jaillon, Olivier, Acinas, Silvia G., Ogata, Hiroyuki, Pelletier, Eric, Stemmann, Lars, Sullivan, Matthew B., Sunagawa, Shinichi, Bopp, Laurent, de Vargas, Colomban, Karp-Boss, Lee, Wincker, Patrick, Lombard, Fabien, Bowler, Chris, Zinger, Lucie, Bork, Peer, Cochrane, Guy, Follows, Mick, Gorsky, Gabriel, Grimsley, Nigel, Guidi, Lionel, Hingamp, Pascal, Karsenti, Eric, Not, Fabrice, Poulton, Nicole, Raes, Jeroen, Sardet, Christian, and Speich, Sabrina

Abstract

The ocean is home to myriad small planktonic organisms that underpin the functioning of marine ecosystems. However, their spatial patterns of diversity and the underlying drivers remain poorly known, precluding projections of their responses to global changes. Here we investigate the latitudinal gradients and global predictors of plankton diversity across archaea, bacteria, eukaryotes, and major virus clades using both molecular and imaging data from Tara Oceans. We show a decline of diversity for most planktonic groups toward the poles, mainly driven by decreasing ocean temperatures. Projections into the future suggest that severe warming of the surface ocean by the end of the 21st century could lead to tropicalization of the diversity of most planktonic groups in temperate and polar regions. These changes may have multiple consequences for marine ecosystem functioning and services and are expected to be particularly significant in key areas for carbon sequestration, fisheries, and marine conservation.

Published
2019

22. Community‐Level Responses to Iron Availability in Open Ocean Plankton Ecosystems

Author

UCL - SST/LIBST - Louvain Institute of Biomolecular Science and Technology, Caputi, Luigi, Carradec, Quentin, Eveillard, Damien, Kirilovsky, Amos, Pelletier, Eric, Pierella Karlusich, Juan J., Rocha Jimenez Vieira, Fabio, Villar, Emilie, Chaffron, Samuel, Malviya, Shruti, Scalco, Eleonora, Acinas, Silvia G., Alberti, Adriana, Aury, Jean‐Marc, Benoiston, Anne‐Sophie, Bertrand, Alexis, Biard, Tristan, Bittner, Lucie, Boccara, Martine, Brum, Jennifer R., Brunet, Christophe, Busseni, Greta, Carratalà, Anna, Claustre, Hervé, Coelho, Luis Pedro, Colin, Sébastien, D'Aniello, Salvatore, Da Silva, Corinne, Del Core, Marianna, Doré, Hugo, Gasparini, Stéphane, Kokoszka, Florian, Jamet, Jean‐Louis, Lejeusne, Christophe, Lepoivre, Cyrille, Lescot, Magali, Lima Mendez, Gipsi, Lombard, Fabien, Lukeš, Julius, Maillet, Nicolas, Madoui, Mohammed‐Amin, Martinez, Elodie, Mazzocchi, Maria Grazia, Néou, Mario B., Paz‐Yepes, Javier, Poulain, Julie, Ramondenc, Simon, Romagnan, Jean‐Baptiste, Roux, Simon, Salvagio Manta, Daniela, Sanges, Remo, Speich, Sabrina, Sprovieri, Mario, Sunagawa, Shinichi, Taillandier, Vincent, Tanaka, Atsuko, Tirichine, Leila, Trottier, Camille, Uitz, Julia, Veluchamy, Alaguraj, Veselá, Jana, Vincent, Flora, Yau, Sheree, Kandels‐Lewis, Stefanie, Searson, Sarah, Dimier, Céline, Picheral, Marc, Bork, Peer, Boss, Emmanuel, Vargas, Colomban, Follows, Michael J., Grimsley, Nigel, Guidi, Lionel, Hingamp, Pascal, Karsenti, Eric, Sordino, Paolo, Stemmann, Lars, Sullivan, Matthew B., Tagliabue, Alessandro, Zingone, Adriana, Garczarek, Laurence, d'Ortenzio, Fabrizio, Testor, Pierre, Not, Fabrice, d'Alcalà, Maurizio Ribera, Wincker, Patrick, Bowler, Chris, Iudicone, Daniele, Gorsky, Gabriel, Jaillon, Olivier, Karp‐Boss, Lee, Krzic, Uros, Ogata, Hiroyuki, Pesant, Stéphane, Raes, Jeroen, Reynaud, Emmanuel G., Sardet, Christian, Sieracki, Mike, Velayoudon, Didier, Weissenbach, Jean, UCL - SST/LIBST - Louvain Institute of Biomolecular Science and Technology, Caputi, Luigi, Carradec, Quentin, Eveillard, Damien, Kirilovsky, Amos, Pelletier, Eric, Pierella Karlusich, Juan J., Rocha Jimenez Vieira, Fabio, Villar, Emilie, Chaffron, Samuel, Malviya, Shruti, Scalco, Eleonora, Acinas, Silvia G., Alberti, Adriana, Aury, Jean‐Marc, Benoiston, Anne‐Sophie, Bertrand, Alexis, Biard, Tristan, Bittner, Lucie, Boccara, Martine, Brum, Jennifer R., Brunet, Christophe, Busseni, Greta, Carratalà, Anna, Claustre, Hervé, Coelho, Luis Pedro, Colin, Sébastien, D'Aniello, Salvatore, Da Silva, Corinne, Del Core, Marianna, Doré, Hugo, Gasparini, Stéphane, Kokoszka, Florian, Jamet, Jean‐Louis, Lejeusne, Christophe, Lepoivre, Cyrille, Lescot, Magali, Lima Mendez, Gipsi, Lombard, Fabien, Lukeš, Julius, Maillet, Nicolas, Madoui, Mohammed‐Amin, Martinez, Elodie, Mazzocchi, Maria Grazia, Néou, Mario B., Paz‐Yepes, Javier, Poulain, Julie, Ramondenc, Simon, Romagnan, Jean‐Baptiste, Roux, Simon, Salvagio Manta, Daniela, Sanges, Remo, Speich, Sabrina, Sprovieri, Mario, Sunagawa, Shinichi, Taillandier, Vincent, Tanaka, Atsuko, Tirichine, Leila, Trottier, Camille, Uitz, Julia, Veluchamy, Alaguraj, Veselá, Jana, Vincent, Flora, Yau, Sheree, Kandels‐Lewis, Stefanie, Searson, Sarah, Dimier, Céline, Picheral, Marc, Bork, Peer, Boss, Emmanuel, Vargas, Colomban, Follows, Michael J., Grimsley, Nigel, Guidi, Lionel, Hingamp, Pascal, Karsenti, Eric, Sordino, Paolo, Stemmann, Lars, Sullivan, Matthew B., Tagliabue, Alessandro, Zingone, Adriana, Garczarek, Laurence, d'Ortenzio, Fabrizio, Testor, Pierre, Not, Fabrice, d'Alcalà, Maurizio Ribera, Wincker, Patrick, Bowler, Chris, Iudicone, Daniele, Gorsky, Gabriel, Jaillon, Olivier, Karp‐Boss, Lee, Krzic, Uros, Ogata, Hiroyuki, Pesant, Stéphane, Raes, Jeroen, Reynaud, Emmanuel G., Sardet, Christian, Sieracki, Mike, Velayoudon, Didier, and Weissenbach, Jean

Abstract

Predicting responses of plankton to variations in essential nutrients is hampered by limited in situ measurements, a poor understanding of community composition, and the lack of reference gene catalogs for key taxa. Iron is a key driver of plankton dynamics and, therefore, of global biogeochemical cycles and climate. To assess the impact of iron availability on plankton communities, we explored the comprehensive bio-oceanographic and bio-omics data sets from Tara Oceans in the context of the iron products from two state-of-the-art global scale biogeochemical models. We obtained novel information about adaptation and acclimation toward iron in a range of phytoplankton, including picocyanobacteria and diatoms, and identified whole subcommunities covarying with iron. Many of the observed global patterns were recapitulated in the Marquesas archipelago, where frequent plankton blooms are believed to be caused by natural iron fertilization, although they are not captured in large-scale biogeochemical models. This work provides a proof of concept that integrative analyses, spanning from genes to ecosystems and viruses to zooplankton, can disentangle the complexity of plankton communities and can lead to more accurate formulations of resource bioavailability in biogeochemical models, thus improving our understanding of plankton resilience in a changing environment. © 2019. American Geophysical Union. All Rights Reserved.

Published
2019

23. Global Trends in Marine Plankton Diversity across Kingdoms of Life

Author

European Commission, Ministerio de Economía y Competitividad (España), Ibarbalz, Federico M., Henry, Nicolas, Brandão, Manoela C., Martini, Séverine, Busseni, Greta, Byrne, Hannah, Coelho, Luis Pedro, Endo, Hisashi, Gasol, Josep M., Gregory, Ann C., Mahé, Frédéric, Rigonato, Janaina, Royo-Llonch, Marta, Salazar, Guillem, Sanz-Sáez, Isabel, Scalco, Eleonora, Soviadan, Yawouvi Dodji, Zayed, Ahmed A., Zingone, Adriana, Labadie, Karine, Ferland, Joannie, Marec, Claudie, Kandels‐Lewis, Stefanie, Picheral, Marc, Dimier, Céline, Poulain, Julie, Pisarev, Sergey, Carmichael, Margaux, Pesant, Stéphane, Babin, Marcel, Boss, Emmanuel, Iudicone, Daniele, Jaillon, Olivier, Acinas, Silvia G., Ogata, Hiroyuki, Pelletier, Eric, Stemmann, Lars, Sullivan, Matthew B., Sunagawa, Shinichi, Bopp, Laurent, Vargas, Colomban de, Karp-Boss, Lee, Wincker, Patrick, Lombard, Fabien, Bowler, Chris, Zinger, Lucie, European Commission, Ministerio de Economía y Competitividad (España), Ibarbalz, Federico M., Henry, Nicolas, Brandão, Manoela C., Martini, Séverine, Busseni, Greta, Byrne, Hannah, Coelho, Luis Pedro, Endo, Hisashi, Gasol, Josep M., Gregory, Ann C., Mahé, Frédéric, Rigonato, Janaina, Royo-Llonch, Marta, Salazar, Guillem, Sanz-Sáez, Isabel, Scalco, Eleonora, Soviadan, Yawouvi Dodji, Zayed, Ahmed A., Zingone, Adriana, Labadie, Karine, Ferland, Joannie, Marec, Claudie, Kandels‐Lewis, Stefanie, Picheral, Marc, Dimier, Céline, Poulain, Julie, Pisarev, Sergey, Carmichael, Margaux, Pesant, Stéphane, Babin, Marcel, Boss, Emmanuel, Iudicone, Daniele, Jaillon, Olivier, Acinas, Silvia G., Ogata, Hiroyuki, Pelletier, Eric, Stemmann, Lars, Sullivan, Matthew B., Sunagawa, Shinichi, Bopp, Laurent, Vargas, Colomban de, Karp-Boss, Lee, Wincker, Patrick, Lombard, Fabien, Bowler, Chris, and Zinger, Lucie

Abstract

The ocean is home to myriad small planktonic organisms that underpin the functioning of marine ecosystems. However, their spatial patterns of diversity and the underlying drivers remain poorly known, precluding projections of their responses to global changes. Here we investigate the latitudinal gradients and global predictors of plankton diversity across archaea, bacteria, eukaryotes, and major virus clades using both molecular and imaging data from Tara Oceans. We show a decline of diversity for most planktonic groups toward the poles, mainly driven by decreasing ocean temperatures. Projections into the future suggest that severe warming of the surface ocean by the end of the 21st century could lead to tropicalization of the diversity of most planktonic groups in temperate and polar regions. These changes may have multiple consequences for marine ecosystem functioning and services and are expected to be particularly significant in key areas for carbon sequestration, fisheries, and marine conservation

Published
2019

24. Community‐Level Responses to Iron Availability in Open Ocean Plankton Ecosystems

Author

Gordon and Betty Moore Foundation, Fondation Prince Albert II de Monaco, National Science Foundation (US), Stazione Zoologica Anton Dohrn, National Fund for Scientific Research (Belgium), Centre National de la Recherche Scientifique (France), Région Bretagne, Caputi, Luigi, Carradec, Quentin, Eveillard, Damien, Kirilovsky, Amos, Pelletier, Eric, Pierella Karlusich, Juan J., Rocha Jimenez Vieira, Fabio, Villar, Emilie, Chaffron, Samuel, Malviya, Shruti, Scalco, Eleonora, Acinas, Silvia G., Alberti, Adriana, Aury, Jean‐Marc, Benoiston, Anne‐Sophie, Bertrand, Alexis, Biard, Tristan, Bittner, Lucie, Boccara, Martine, Brum, Jennifer R., Brunet, Christophe, Busseni, Greta, Carratalà, Anna, Claustre, Hervé, Coelho, Luis Pedro, Colin, Sebastien, D'Aniello, Salvatore, Da Silva, Corinne, Del Core, Marianna, Doré, Hugo, Gasparini, Stéphane, Kokoszka, Florian, Jamet, Jean‐Louis, Lejeusne, Christophe, Lepoivre, Cyrille, Lescot, Magali, Lima-Mendez, Gipsi, Lombard, Fabien, Lukeš, Julius, Maillet, Nicolas, Madoui, Mohammed‐Amin, Martinez, Elodie, Mazzocchi, M. G., Néou, Mario B., Paz‐Yepes, Javier, Poulain, Julie, Ramondenc, Simon, Romagnan, Jean-Baptiste, Roux, Simon, Salvagio Manta, Daniela, Sanges, R., Speich, Sabrina, Sprovieri, M., Sunagawa, Shinichi, Taillandier, Vincent, Tanaka, Atsuko, Tirichine, Leila, Trottier, Camille, Uitz, Julia, Veluchamy, Alaguraj, Veselá, Jana, Vincent, Flora, Yau, Sheree, Kandels‐Lewis, Stefanie, Searson, Sarah, Dimier, Céline, Picheral, Marc, Bork, Peer, Boss, Emmanuel, Vargas, Colomban de, Follows, Michael J., Grimsley, Nigel, Hingamp, Pascal, Karsenti, Eric, Sordino, Paolo, Stemmann, Lars, Sullivan, Matthew B., Tagliabue, Alessandro, Zingone, Adriana, Garczarek, Laurence, D'Ortenzio, Fabrizio, Testor, Pierre, Not, Fabrice, Ribera d’Alcalà, Maurizio, Wincker, Patrick, Bowler, Chris, Guidi, Lionel, Iudicone, Daniele, Gordon and Betty Moore Foundation, Fondation Prince Albert II de Monaco, National Science Foundation (US), Stazione Zoologica Anton Dohrn, National Fund for Scientific Research (Belgium), Centre National de la Recherche Scientifique (France), Région Bretagne, Caputi, Luigi, Carradec, Quentin, Eveillard, Damien, Kirilovsky, Amos, Pelletier, Eric, Pierella Karlusich, Juan J., Rocha Jimenez Vieira, Fabio, Villar, Emilie, Chaffron, Samuel, Malviya, Shruti, Scalco, Eleonora, Acinas, Silvia G., Alberti, Adriana, Aury, Jean‐Marc, Benoiston, Anne‐Sophie, Bertrand, Alexis, Biard, Tristan, Bittner, Lucie, Boccara, Martine, Brum, Jennifer R., Brunet, Christophe, Busseni, Greta, Carratalà, Anna, Claustre, Hervé, Coelho, Luis Pedro, Colin, Sebastien, D'Aniello, Salvatore, Da Silva, Corinne, Del Core, Marianna, Doré, Hugo, Gasparini, Stéphane, Kokoszka, Florian, Jamet, Jean‐Louis, Lejeusne, Christophe, Lepoivre, Cyrille, Lescot, Magali, Lima-Mendez, Gipsi, Lombard, Fabien, Lukeš, Julius, Maillet, Nicolas, Madoui, Mohammed‐Amin, Martinez, Elodie, Mazzocchi, M. G., Néou, Mario B., Paz‐Yepes, Javier, Poulain, Julie, Ramondenc, Simon, Romagnan, Jean-Baptiste, Roux, Simon, Salvagio Manta, Daniela, Sanges, R., Speich, Sabrina, Sprovieri, M., Sunagawa, Shinichi, Taillandier, Vincent, Tanaka, Atsuko, Tirichine, Leila, Trottier, Camille, Uitz, Julia, Veluchamy, Alaguraj, Veselá, Jana, Vincent, Flora, Yau, Sheree, Kandels‐Lewis, Stefanie, Searson, Sarah, Dimier, Céline, Picheral, Marc, Bork, Peer, Boss, Emmanuel, Vargas, Colomban de, Follows, Michael J., Grimsley, Nigel, Hingamp, Pascal, Karsenti, Eric, Sordino, Paolo, Stemmann, Lars, Sullivan, Matthew B., Tagliabue, Alessandro, Zingone, Adriana, Garczarek, Laurence, D'Ortenzio, Fabrizio, Testor, Pierre, Not, Fabrice, Ribera d’Alcalà, Maurizio, Wincker, Patrick, Bowler, Chris, Guidi, Lionel, and Iudicone, Daniele

Abstract

Predicting responses of plankton to variations in essential nutrients is hampered by limited in situ measurements, a poor understanding of community composition, and the lack of reference gene catalogs for key taxa. Iron is a key driver of plankton dynamics and, therefore, of global biogeochemical cycles and climate. To assess the impact of iron availability on plankton communities, we explored the comprehensive bio‐oceanographic and bio‐omics data sets from Tara Oceans in the context of the iron products from two state‐of‐the‐art global scale biogeochemical models. We obtained novel information about adaptation and acclimation toward iron in a range of phytoplankton, including picocyanobacteria and diatoms, and identified whole subcommunities covarying with iron. Many of the observed global patterns were recapitulated in the Marquesas archipelago, where frequent plankton blooms are believed to be caused by natural iron fertilization, although they are not captured in large‐scale biogeochemical models. This work provides a proof of concept that integrative analyses, spanning from genes to ecosystems and viruses to zooplankton, can disentangle the complexity of plankton communities and can lead to more accurate formulations of resource bioavailability in biogeochemical models, thus improving our understanding of plankton resilience in a changing environment

Published
2019

25. First Tara Oceans V9 rDNA metabarcoding dataset

Author

de Vargas, Colomban, Audic, Stéphane, Henry, Nicolas, Decelle, Johan, Mahé, Frédéric, Logares, Ramiro, Lara, Enrique, Berney, Cédric, Le Bescot, Noan, Probert, Ian, Carmichael, Margaux, Poulain, Julie, Romac, Sarah, Colin, Sébastien, Aury, Jean-Marc, Bittner, Lucie, Chaffron, Samuel, Dunthorn, Micah, Engelen, Stefan, Flegontova, Olga, Guidi, Lionel, Horák, Aleš, Jaillon, Olivier, Lima-Mendez, Gipsi, Lukeš, Julius, Malviya, Shruti, Morard, Raphael, Mulot, Matthieu, Scalco, Eleonora, Siano, Raffaele, Vincent, Flora, Zingone, Adriana, Dimier, Céline, Picheral, Marc, Searson, Sarah, Kandels-Lewis, Stefanie, Tara Oceans Coordinators, Acinas, Silvia G., Bork, Peer, Bowler, Chris, Gorsky, Gabriel, Grimsley, Nigel, Hingamp, Pascal, Iudicone, Daniele, Not, Fabrice, Ogata, Hiroyuki, Pesant, Stephane, Raes, Jeroen, Sieracki, Mike, Speich, Sabrina, Stemmann, Lars, Sunagawa, Shinichi, Weissenbach, Jean, Wincker, Patrick, and Karsenti, Eric

Subjects
14. Life underwater
Abstract

Accompanying material, text, data and figures for the article de Vargas et al., 'Eukaryotic plankton diversity in the sunlit ocean', Science 348, 1261605 (2015), doi: 10.1126/science.1261605 &nbsp

Published
2015
Full Text
View/download PDF

26. Environmental characteristics of Agulhas rings affect interocean plankton transport

Author

Villar, Emilie, Farrant, Gregory K, Follows, Michael, Garczarek, Laurence, Speich, Sabrina, Audic, Stéphane, Bittner, Lucie, Blanke, Bruno, Brum, Jennifer R, Brunet, Christophe, Casotti, Raffaella, Chase, Alison, Dolan, John R, d'Ortenzio, Fabrizio, Gattuso, Jean-Pierre, Grima, Nicolas, Guidi, Lionel, Hill, Christopher N, Jahn, Oliver, Jamet, Jean-Louis, Le Goff, Hervé, Lepoivre, Cyrille, Malviya, Shruti, Pelletier, Eric, Romagnan, Jean-Baptiste, Roux, Simon, Santini, Sébastien, Scalco, Eleonora, Schwenck, Sarah M, Tanaka, Atsuko, Testor, Pierre, Vannier, Thomas, Vincent, Flora, Zingone, Adriana, Dimier, Céline, Picheral, Marc, Searson, Sarah, Kandels-Lewis, Stefanie, Tara Oceans coordinators, Acinas, Silvia G, Bork, Peer, Boss, Emmanuel, de Vargas, Colomban, Gorsky, Gabriel, Ogata, Hiroyuki, Pesant, Stéphane, Sullivan, Matthew B, Sunagawa, Shinichi, Wincker, Patrick, Karsenti, Eric, Bowler, Chris, Not, Fabrice, Hingamp, Pascal, and Iudicone, Daniele

Subjects
fungi
Abstract

Agulhas rings provide the principal route for ocean waters to circulate from the Indo-Pacific to the Atlantic basin. Their influence on global ocean circulation is well known, but their role in plankton transport is largely unexplored. We show that, although the coarse taxonomic structure of plankton communities is continuous across the Agulhas choke point, South Atlantic plankton diversity is altered compared with Indian Ocean source populations. Modeling and in situ sampling of a young Agulhas ring indicate that strong vertical mixing drives complex nitrogen cycling, shaping community metabolism and biogeochemical signatures as the ring and associated plankton transit westward. The peculiar local environment inside Agulhas rings may provide a selective mechanism contributing to the limited dispersal of Indian Ocean plankton populations into the Atlantic., プランクトンの世界 : 新しいフロンティア -タラ海洋探査からの最新情報-. 京都大学プレスリリース. 2015-05-22.

Published
2015

27. Ocean plankton. Eukaryotic plankton diversity in the sunlit ocean

Author

de Vargas, Colomban, Audic, Stéphane, Henry, Nicolas, Decelle, Johan, Mahé, Frédéric, Logares, Ramiro, Lara, Enrique, Berney, Cédric, Le Bescot, Noan, Probert, Ian, Carmichael, Margaux, Poulain, Julie, Romac, Sarah, Colin, Sébastien, Aury, Jean-Marc, Bittner, Lucie, Chaffron, Samuel, Dunthorn, Micah, Engelen, Stefan, Flegontova, Olga, Guidi, Lionel, Horak, Ales, Jaillon, Olivier, Lima-Mendez, Gipsi, Lukeš, Julius, Malviya, Shruti, Morard, Raphael, Mulot, Matthieu, Scalco, Eleonora, Siano, Raffaele, Vincent, Flora, Zingone, Adriana, Dimier, Céline, Picheral, Marc, Searson, Sarah, Kandels-Lewis, Stefanie, Acinas, Silvia G, Bork, Peer, Bowler, Chris, Gorsky, Gabriel, Grimsley, Nigel, Hingamp, Pascal, Iudicone, Daniele, Not, Fabrice, Ogata, Hiroyuki, Pesant, Stéphane, Raes, Jeroen, Sieracki, Michael E, Speich, Sabrina, Stemmann, Lars, Tara Oceans coordinators, Department of Bio-engineering Sciences, and Microbiology

Subjects
Oceans and Seas, fungi, plankton, Sunlight, Animals, DNA Barcoding, Taxonomic, Eukaryota, natural sciences, Sequence Analysis, DNA, phylogeny, DNA, Ribosomal, Ribosomes, biodiversity
Abstract

Marine plankton support global biological and geochemical processes. Surveys of their biodiversity have hitherto been geographically restricted and have not accounted for the full range of plankton size. We assessed eukaryotic diversity from 334 size-fractionated photic-zone plankton communities collected across tropical and temperate oceans during the circumglobal Tara Oceans expedition. We analyzed 18S ribosomal DNA sequences across the intermediate plankton-size spectrum from the smallest unicellular eukaryotes (protists, >0.8 micrometers) to small animals of a few millimeters. Eukaryotic ribosomal diversity saturated at ~150,000 operational taxonomic units, about one-third of which could not be assigned to known eukaryotic groups. Diversity emerged at all taxonomic levels, both within the groups comprising the ~11,200 cataloged morphospecies of eukaryotic plankton and among twice as many other deep-branching lineages of unappreciated importance in plankton ecology studies. Most eukaryotic plankton biodiversity belonged to heterotrophic protistan groups, particularly those known to be parasites or symbiotic hosts.

Published
2015

28. Environmental characteristics of Agulhas rings affect interocean plankton transport.

Author

70291432, Villar, Emilie, Farrant, Gregory K, Follows, Michael, Garczarek, Laurence, Speich, Sabrina, Audic, Stéphane, Bittner, Lucie, Blanke, Bruno, Brum, Jennifer R, Brunet, Christophe, Casotti, Raffaella, Chase, Alison, Dolan, John R, d'Ortenzio, Fabrizio, Gattuso, Jean-Pierre, Grima, Nicolas, Guidi, Lionel, Hill, Christopher N, Jahn, Oliver, Jamet, Jean-Louis, Le Goff, Hervé, Lepoivre, Cyrille, Malviya, Shruti, Pelletier, Eric, Romagnan, Jean-Baptiste, Roux, Simon, Santini, Sébastien, Scalco, Eleonora, Schwenck, Sarah M, Tanaka, Atsuko, Testor, Pierre, Vannier, Thomas, Vincent, Flora, Zingone, Adriana, Dimier, Céline, Picheral, Marc, Searson, Sarah, Kandels-Lewis, Stefanie, Tara Oceans coordinators, Acinas, Silvia G, Bork, Peer, Boss, Emmanuel, de Vargas, Colomban, Gorsky, Gabriel, Ogata, Hiroyuki, Pesant, Stéphane, Sullivan, Matthew B, Sunagawa, Shinichi, Wincker, Patrick, Karsenti, Eric, Bowler, Chris, Not, Fabrice, Hingamp, Pascal, Iudicone, Daniele, 70291432, Villar, Emilie, Farrant, Gregory K, Follows, Michael, Garczarek, Laurence, Speich, Sabrina, Audic, Stéphane, Bittner, Lucie, Blanke, Bruno, Brum, Jennifer R, Brunet, Christophe, Casotti, Raffaella, Chase, Alison, Dolan, John R, d'Ortenzio, Fabrizio, Gattuso, Jean-Pierre, Grima, Nicolas, Guidi, Lionel, Hill, Christopher N, Jahn, Oliver, Jamet, Jean-Louis, Le Goff, Hervé, Lepoivre, Cyrille, Malviya, Shruti, Pelletier, Eric, Romagnan, Jean-Baptiste, Roux, Simon, Santini, Sébastien, Scalco, Eleonora, Schwenck, Sarah M, Tanaka, Atsuko, Testor, Pierre, Vannier, Thomas, Vincent, Flora, Zingone, Adriana, Dimier, Céline, Picheral, Marc, Searson, Sarah, Kandels-Lewis, Stefanie, Tara Oceans coordinators, Acinas, Silvia G, Bork, Peer, Boss, Emmanuel, de Vargas, Colomban, Gorsky, Gabriel, Ogata, Hiroyuki, Pesant, Stéphane, Sullivan, Matthew B, Sunagawa, Shinichi, Wincker, Patrick, Karsenti, Eric, Bowler, Chris, Not, Fabrice, Hingamp, Pascal, and Iudicone, Daniele

Abstract

Agulhas rings provide the principal route for ocean waters to circulate from the Indo-Pacific to the Atlantic basin. Their influence on global ocean circulation is well known, but their role in plankton transport is largely unexplored. We show that, although the coarse taxonomic structure of plankton communities is continuous across the Agulhas choke point, South Atlantic plankton diversity is altered compared with Indian Ocean source populations. Modeling and in situ sampling of a young Agulhas ring indicate that strong vertical mixing drives complex nitrogen cycling, shaping community metabolism and biogeochemical signatures as the ring and associated plankton transit westward. The peculiar local environment inside Agulhas rings may provide a selective mechanism contributing to the limited dispersal of Indian Ocean plankton populations into the Atlantic.

Published
2015

29. Eukaryotic plankton diversity in the sunlit ocean.

Author

70291432, de Vargas, Colomban, Audic, Stéphane, Henry, Nicolas, Decelle, Johan, Mahé, Frédéric, Logares, Ramiro, Lara, Enrique, Berney, Cédric, Le Bescot, Noan, Probert, Ian, Carmichael, Margaux, Poulain, Julie, Romac, Sarah, Colin, Sébastien, Aury, Jean-Marc, Bittner, Lucie, Chaffron, Samuel, Dunthorn, Micah, Engelen, Stefan, Flegontova, Olga, Guidi, Lionel, Horák, Aleš, Jaillon, Olivier, Lima-Mendez, Gipsi, Lukeš, Julius, Malviya, Shruti, Morard, Raphael, Mulot, Matthieu, Scalco, Eleonora, Siano, Raffaele, Vincent, Flora, Zingone, Adriana, Dimier, Céline, Picheral, Marc, Searson, Sarah, Kandels-Lewis, Stefanie, Tara Oceans Coordinators, Acinas, Silvia G, Bork, Peer, Bowler, Chris, Gorsky, Gabriel, Grimsley, Nigel, Hingamp, Pascal, Iudicone, Daniele, Not, Fabrice, Ogata, Hiroyuki, Pesant, Stephane, Raes, Jeroen, Sieracki, Michael E, Speich, Sabrina, Stemmann, Lars, Sunagawa, Shinichi, Weissenbach, Jean, Wincker, Patrick, Karsenti, Eric, 70291432, de Vargas, Colomban, Audic, Stéphane, Henry, Nicolas, Decelle, Johan, Mahé, Frédéric, Logares, Ramiro, Lara, Enrique, Berney, Cédric, Le Bescot, Noan, Probert, Ian, Carmichael, Margaux, Poulain, Julie, Romac, Sarah, Colin, Sébastien, Aury, Jean-Marc, Bittner, Lucie, Chaffron, Samuel, Dunthorn, Micah, Engelen, Stefan, Flegontova, Olga, Guidi, Lionel, Horák, Aleš, Jaillon, Olivier, Lima-Mendez, Gipsi, Lukeš, Julius, Malviya, Shruti, Morard, Raphael, Mulot, Matthieu, Scalco, Eleonora, Siano, Raffaele, Vincent, Flora, Zingone, Adriana, Dimier, Céline, Picheral, Marc, Searson, Sarah, Kandels-Lewis, Stefanie, Tara Oceans Coordinators, Acinas, Silvia G, Bork, Peer, Bowler, Chris, Gorsky, Gabriel, Grimsley, Nigel, Hingamp, Pascal, Iudicone, Daniele, Not, Fabrice, Ogata, Hiroyuki, Pesant, Stephane, Raes, Jeroen, Sieracki, Michael E, Speich, Sabrina, Stemmann, Lars, Sunagawa, Shinichi, Weissenbach, Jean, Wincker, Patrick, and Karsenti, Eric

Abstract

Marine plankton support global biological and geochemical processes. Surveys of their biodiversity have hitherto been geographically restricted and have not accounted for the full range of plankton size. We assessed eukaryotic diversity from 334 size-fractionated photic-zone plankton communities collected across tropical and temperate oceans during the circumglobal Tara Oceans expedition. We analyzed 18S ribosomal DNA sequences across the intermediate plankton-size spectrum from the smallest unicellular eukaryotes (protists, >0.8 micrometers) to small animals of a few millimeters. Eukaryotic ribosomal diversity saturated at ~150, 000 operational taxonomic units, about one-third of which could not be assigned to known eukaryotic groups. Diversity emerged at all taxonomic levels, both within the groups comprising the ~11, 200 cataloged morphospecies of eukaryotic plankton and among twice as many other deep-branching lineages of unappreciated importance in plankton ecology studies. Most eukaryotic plankton biodiversity belonged to heterotrophic protistan groups, particularly those known to be parasites or symbiotic hosts.

Published
2015

30. Eukaryotic plankton diversity in the sunlit ocean

Author

De Vargas, Colomban, Audic, Stephane, Henry, Nicolas, Decelle, Johan, Mahe, Frederic, Logares, Ramiro, Lara, Enrique, Berney, Cedric, Le Bescot, Noan, Probert, Ian, Carmichael, Margaux, Poulain, Julie, Romac, Sarah, Colin, Sebastien, Aury, Jean-marc, Bittner, Lucie, Chaffron, Samuel, Dunthorn, Micah, Engelen, Stefan, Flegontova, Olga, Guidi, Lionel, Horak, Ales, Jaillon, Olivier, Lima-mendez, Gipsi, Lukes, Julius, Malviya, Shruti, Morard, Raphael, Mulot, Matthieu, Scalco, Eleonora, Siano, Raffaele, Vincent, Flora, Zingone, Adriana, Dimier, Celine, Picheral, Marc, Searson, Sarah, Kandels-lewis, Stefanie, Acinas, Silvia G., Bork, Peer, Bowler, Chris, Gorsky, Gabriel, Grimsley, Nigel, Hingamp, Pascal, Iudicone, Daniele, Not, Fabrice, Ogata, Hiroyuki, Pesant, Stephane, Raes, Jeroen, Sieracki, Michael E., Speich, Sabrina, Stemmann, Lars, Sunagawa, Shinichi, Weissenbach, Jean, Wincker, Patrick, Karsenti, Eric, De Vargas, Colomban, Audic, Stephane, Henry, Nicolas, Decelle, Johan, Mahe, Frederic, Logares, Ramiro, Lara, Enrique, Berney, Cedric, Le Bescot, Noan, Probert, Ian, Carmichael, Margaux, Poulain, Julie, Romac, Sarah, Colin, Sebastien, Aury, Jean-marc, Bittner, Lucie, Chaffron, Samuel, Dunthorn, Micah, Engelen, Stefan, Flegontova, Olga, Guidi, Lionel, Horak, Ales, Jaillon, Olivier, Lima-mendez, Gipsi, Lukes, Julius, Malviya, Shruti, Morard, Raphael, Mulot, Matthieu, Scalco, Eleonora, Siano, Raffaele, Vincent, Flora, Zingone, Adriana, Dimier, Celine, Picheral, Marc, Searson, Sarah, Kandels-lewis, Stefanie, Acinas, Silvia G., Bork, Peer, Bowler, Chris, Gorsky, Gabriel, Grimsley, Nigel, Hingamp, Pascal, Iudicone, Daniele, Not, Fabrice, Ogata, Hiroyuki, Pesant, Stephane, Raes, Jeroen, Sieracki, Michael E., Speich, Sabrina, Stemmann, Lars, Sunagawa, Shinichi, Weissenbach, Jean, Wincker, Patrick, and Karsenti, Eric

Abstract

Marine plankton support global biological and geochemical processes. Surveys of their biodiversity have hitherto been geographically restricted and have not accounted for the full range of plankton size. We assessed eukaryotic diversity from 334 size-fractionated photic-zone plankton communities collected across tropical and temperate oceans during the circumglobal Tara Oceans expedition. We analyzed 18S ribosomal DNA sequences across the intermediate plankton-size spectrum from the smallest unicellular eukaryotes (protists, > 0.8 micrometers) to small animals of a few millimeters. Eukaryotic ribosomal diversity saturated at similar to 150,000 operational taxonomic units, about one-third of which could not be assigned to known eukaryotic groups. Diversity emerged at all taxonomic levels, both within the groups comprising the similar to 11,200 cataloged morphospecies of eukaryotic plankton and among twice as many other deep-branching lineages of unappreciated importance in plankton ecology studies. Most eukaryotic plankton biodiversity belonged to heterotrophic protistan groups, particularly those known to be parasites or symbiotic hosts.

Published
2015
Full Text
View/download PDF

33. The epibiotic life of the cosmopolitan diatom Fragilariopsis dolioluson heterotrophic ciliates in the open ocean

Author

Vincent, Flora, Colin, Sébastien, Romac, Sarah, Scalco, Eleonora, Bittner, Lucie, Garcia, Yonara, Lopes, Rubens, Dolan, John, Zingone, Adriana, Vargas, Colomban, and Bowler, Chris

Abstract

Diatoms are a diverse and ecologically important group of phytoplankton. Although most species are considered free living, several are known to interact with other organisms within the plankton. Detailed imaging and molecular characterization of any such partnership is, however, limited, and an appraisal of the large-scale distribution and ecology of such consortia was never attempted. Here, observation of TaraOceans samples from the Benguela Current led to the detection of an epibiotic association between a pennate diatom and a tintinnid ciliate. We identified the diatom as Fragilariopsis doliolusthat possesses a unique feature to form barrel-shaped chains, associated with seven different genera of tintinnids including five previously undescribed associations. The organisms were commonly found together in the Atlantic and Pacific Ocean basins, and live observations of the interaction have been recorded for the first time. By combining confocal and scanning electron microscopy of individual consortia with the sequencing of high-resolution molecular markers, we analyzed their distribution in the global ocean, revealing morpho-genetically distinct tintinnid haplotypes and biogeographically structured diatom haplotypes. The diatom was among the most abundant in the global ocean. We show that the consortia were particularly prevalent in nutrient-replete conditions, rich in potential predators. These observations support the hypothesis of a mutualistic symbiosis, wherein diatoms acquire increased motility and tintinnids benefit from silicification through increased protection, and highlight that such associations may be more prevalent than currently appreciated.

Published
2018
Full Text
View/download PDF

35. Genetic characterization and life cycle of the diatom Fragilariopsis kerguelensis.

Author

Fuchs, Nike, Scalco, Eleonora, Kooistra, Wiebe H.C.F., Assmy, Philipp, and Montresor, Marina

Subjects
*LIFE cycles (Biology), *DIATOMS, *PLANKTON, *BIOGEOCHEMICAL cycles, *NUCLEOTIDE sequence, *BASE pairs
Abstract

The planktonic diatomFragilariopsis kerguelensisplays an important role in the biogeochemical cycles of the Southern Ocean, where remains of its frustules form the largest deposit of biogenic silica anywhere in the world. We assessed the genetic identity of 26 strains, from cells collected at various sites in the Southern Ocean, using three molecular markers, LSU and ITS rDNA andrbcL. The LSU sequences were identical among the tested strains, ITS sequences were highly similar, and only one base pair difference was detected among therbcL sequences. These results, together with a large number of successful mating experiments demonstrated that the strains belong to a single biological species. We investigated the mating system and life cycle traits ofF. kerguelensis. Cell size diminished gradually in clonal strains. Gamete formation only occurred when strains of opposite mating type – within a cell size range of 7–36 µm – were mixed together. Two binucleate gametes were formed in each gametangium and gamete conjugation produced a zygote that had four nuclei and was surrounded by thin siliceous scales. Two out of the four nuclei subsequently degenerated and the zygote expanded to form an auxospore surrounded by a transverse and a longitudinal perizonium. Staining with the fluorochrome PDMPO provided for the first time a clear demonstration that the longitudinal perizonium is formed after auxospore expansion is complete. Initial cells produced within the mature auxospores were 78–101 µm in length. Various authors have shown that the average valve size ofF. kerguelensisvaries in sediment samples collected in regions and seasons with different primary production regimes and this parameter has thus been proposed as a biological proxy for palaeo-productivity. A better understanding of the life cycle ofF. kerguelensisshould help the design of future investigations aimed at testing the link between cell size distribution in the natural environment and the role that environmental factors might have in the regulation of population cell size. [ABSTRACT FROM PUBLISHER]

Published
2013
Full Text
View/download PDF

36. Global Trends in Marine Plankton Diversity across Kingdoms of Life

Author

Ibarbalz, Federico M., Henry, Nicolas, Brandão, Manoela C., Martini, Séverine, Busseni, Greta, Byrne, Hannah, Coelho, Luis P., Endo, Hisashi, Gasol, Josep M., Gregory, Ann C., Mahé, Frédéric, Rigonato, Janaina, Royo-Llonch, Marta, Salazar Guiral, Guillem, Sanz-Sáez, Isabel, Scalco, Eleonora, Soviadan, Dodji, Zayed, Ahmed A., Zingone, Adriana, Labadie, Karine, Ferland, Joannie, Marec, Claudie, Kandels, Stefanie, Picheral, Marc, Poulain, Julie, Pisarev, Sergey, Carmichael, Margaux, Pesant, Stéphane, Acinas, Silvia G., Tara Oceans Coordinators, Babin, Marcel, Bork, Peer, Boss, Emmanuel, Bowler, Chris, Cochrane, Guy R., de Vargas, Colomban, Follows, Michael J., Gorsky, Gabriel, Grimsley, Nigel, Guidi, Lionel, Hingamp, Pascal, Iudicone, Daniele, Jaillon, Olivier, Karp-Boss, Lee, Karsenti, Eric, Not, Fabrice, Ogata, Hiroyuki, Poulton, Nicole, Raes, Jeroen, Sardet, Christian, Speich, Sabrina, Stemmann, Lars, Sullivan, Matthew B., Sunagawa, Shinichi, Wincker, Patrick, Pelletier, Eric, Bopp, Laurent, Lombard, Fabien, and Zinger, Lucie

Subjects
13. Climate action, fungi, 14. Life underwater, 15. Life on land, human activities
Abstract

The ocean is home to myriad small planktonic organisms that underpin the functioning of marine ecosystems. However, their spatial patterns of diversity and the underlying drivers remain poorly known, precluding projections of their responses to global changes. Here we investigate the latitudinal gradients and global predictors of plankton diversity across archaea, bacteria, eukaryotes, and major virus clades using both molecular and imaging data from Tara Oceans. We show a decline of diversity for most planktonic groups toward the poles, mainly driven by decreasing ocean temperatures. Projections into the future suggest that severe warming of the surface ocean by the end of the 21st century could lead to tropicalization of the diversity of most planktonic groups in temperate and polar regions. These changes may have multiple consequences for marine ecosystem functioning and services and are expected to be particularly significant in key areas for carbon sequestration, fisheries, and marine conservation., Cell, 179 (5), ISSN:0092-8674, ISSN:1097-4172

37. Eukaryotic plankton diversity in the sunlit ocean

Author

de Vargas, Colomban, Audic, Stéphane, Henry, Nicolas, Decelle, Johan, Mahé, Frédéric, Logares, Ramiro, Lara, Enrique, Berney, Cédric, Le Bescot, Noan, Probert, Ian, Carmichael, Margaux, Poulain, Julie, Romac, Sarah, Colin, Sébastien, Aury, Jean-Marc, Bittner, Lucie, Chaffron, Samuel, Dunthorn, Micah, Engelen, Stefan, Flegontova, Olga, Guidi, Lionel, Horák, Aleš, Jaillon, Olivier, Lima-Mendez, Gipsi, Lukeš, Julius, Malviya, Shruti, Morard, Raphael, Mulot, Matthieu, Scalco, Eleonora, Siano, Raffaele, Vincent, Flora, Zingone, Adriana, Dimier, Céline, Picheral, Marc, Searson, Sarah, Kandels-Lewis, Stefanie, Tara Oceans Coordinators, Acinas, Silvia G, Bork, Peer, Bowler, Chris, Gorsky, Gabriel, Grimsley, Nigel, Hingamp, Pascal, Iudicone, Daniele, Not, Fabrice, Ogata, Hiroyuki, Pesant, Stephane, Raes, Jeroen, Sieracki, Michael E, Speich, Sabrina, Stemmann, Lars, Sunagawa, Shinichi, Weissenbach, Jean, Wincker, Patrick, and Karsenti, Eric

Subjects
fungi, natural sciences
Abstract

Marine plankton support global biological and geochemical processes. Surveys of their biodiversity have hitherto been geographically restricted and have not accounted for the full range of plankton size. We assessed eukaryotic diversity from 334 size-fractionated photic-zone plankton communities collected across tropical and temperate oceans during the circumglobal Tara Oceans expedition. We analyzed 18S ribosomal DNA sequences across the intermediate plankton-size spectrum from the smallest unicellular eukaryotes (protists, >0.8 micrometers) to small animals of a few millimeters. Eukaryotic ribosomal diversity saturated at ~150, 000 operational taxonomic units, about one-third of which could not be assigned to known eukaryotic groups. Diversity emerged at all taxonomic levels, both within the groups comprising the ~11, 200 cataloged morphospecies of eukaryotic plankton and among twice as many other deep-branching lineages of unappreciated importance in plankton ecology studies. Most eukaryotic plankton biodiversity belonged to heterotrophic protistan groups, particularly those known to be parasites or symbiotic hosts., プランクトンの世界 : 新しいフロンティア -タラ海洋探査からの最新情報-. 京都大学プレスリリース. 2015-05-22.

38. Global trends in marine plankton diversity across kingdoms of life

Author

Ibarbalz, Federico M., Henry, Nicolas, Brandão, Manoela C., Martini, Severine, Busseni, Greta, Byrne, Hannah, Coelho, Luis Pedro, Endo, Hisashi, Gasol, Josep, Gregory, Ann C., Mahe ́, Frédéric, Rigonato, Janaina, Royo-Llonch, Marta, Salazar, Guillem, Sanz-Sáez, Isabel, Scalco, Eleonora, Soviadan, Dodji, Zayed, Ahmed A., Zingone, Adriana, Labadie, Karine, Ferland, Joannie, Marec, Claudie, Kandels, Stefanie, Picheral, Marc, Dimier, Celine, Poulain, Julie, Pisarev, Sergey, Carmichael, Margaux, Pesant, Stephane, Babin, Marcel, Boss, Emmanuel, Iudicone, Daniele, Jaillon, Olivier, Acinas, Silvia G., Ogata, Hiroyuki, Pelletier, Eric, Stemmann, Lars, Sullivan, Matthew B., Sunagawa, Shinichi, Bopp, Laurent, de Vargas, Colomban, Karp-Boss, Lee, Wincker, Patrick, Lombard, Fabien, Bowler, Chris, Zinger, Lucie, Ibarbalz, Federico M., Henry, Nicolas, Brandão, Manoela C., Martini, Severine, Busseni, Greta, Byrne, Hannah, Coelho, Luis Pedro, Endo, Hisashi, Gasol, Josep, Gregory, Ann C., Mahe ́, Frédéric, Rigonato, Janaina, Royo-Llonch, Marta, Salazar, Guillem, Sanz-Sáez, Isabel, Scalco, Eleonora, Soviadan, Dodji, Zayed, Ahmed A., Zingone, Adriana, Labadie, Karine, Ferland, Joannie, Marec, Claudie, Kandels, Stefanie, Picheral, Marc, Dimier, Celine, Poulain, Julie, Pisarev, Sergey, Carmichael, Margaux, Pesant, Stephane, Babin, Marcel, Boss, Emmanuel, Iudicone, Daniele, Jaillon, Olivier, Acinas, Silvia G., Ogata, Hiroyuki, Pelletier, Eric, Stemmann, Lars, Sullivan, Matthew B., Sunagawa, Shinichi, Bopp, Laurent, de Vargas, Colomban, Karp-Boss, Lee, Wincker, Patrick, Lombard, Fabien, Bowler, Chris, and Zinger, Lucie

Abstract

Ibarbalz, F. M., Henry, N., Brandão, M. C., Martini, S., Busseni, G., Byrne, H., ... Picheral, M. (2019). Global trends in marine plankton diversity across kingdoms of life. Cell, 179(5), 1084-1097. Available here

39. Eukaryotic plankton diversity in the sunlit ocean

Author

de Vargas, Colomban, Audic, Stéphane, Henry, Nicolas, Decelle, Johan, Mahé, Frédéric, Logares, Ramiro, Lara, Enrique, Berney, Cédric, Le Bescot, Noan, Probert, Ian, Carmichael, Margaux, Poulain, Julie, Romac, Sarah, Colin, Sébastien, Aury, Jean-Marc, Bittner, Lucie, Chaffron, Samuel, Dunthorn, Micah, Engelen, Stefan, Flegontova, Olga, Guidi, Lionel, Horák, Aleš, Jaillon, Olivier, Lima-Mendez, Gipsi, Lukeš, Julius, Malviya, Shruti, Morard, Raphael, Mulot, Matthieu, Scalco, Eleonora, Siano, Raffaele, Vincent, Flora, Zingone, Adriana, Dimier, Céline, Picheral, Marc, Searson, Sarah, Kandels-Lewis, Stefanie, Acinas, Silvia G, Bork, Peer, Bowler, Chris, Gorsky, Gabriel, Grimsley, Nigel, Hingamp, Pascal, Iudicone, Daniele, Not, Fabrice, Ogata, Hiroyuki, Pesant, Stephane, Raes, Jeroen, Sieracki, Michael E, Speich, Sabrina, Stemmann, Lars, Sunagawa, Shinichi, Weissenbach, Jean, Wincker, Patrick, Karsenti, Eric, de Vargas, Colomban, Audic, Stéphane, Henry, Nicolas, Decelle, Johan, Mahé, Frédéric, Logares, Ramiro, Lara, Enrique, Berney, Cédric, Le Bescot, Noan, Probert, Ian, Carmichael, Margaux, Poulain, Julie, Romac, Sarah, Colin, Sébastien, Aury, Jean-Marc, Bittner, Lucie, Chaffron, Samuel, Dunthorn, Micah, Engelen, Stefan, Flegontova, Olga, Guidi, Lionel, Horák, Aleš, Jaillon, Olivier, Lima-Mendez, Gipsi, Lukeš, Julius, Malviya, Shruti, Morard, Raphael, Mulot, Matthieu, Scalco, Eleonora, Siano, Raffaele, Vincent, Flora, Zingone, Adriana, Dimier, Céline, Picheral, Marc, Searson, Sarah, Kandels-Lewis, Stefanie, Acinas, Silvia G, Bork, Peer, Bowler, Chris, Gorsky, Gabriel, Grimsley, Nigel, Hingamp, Pascal, Iudicone, Daniele, Not, Fabrice, Ogata, Hiroyuki, Pesant, Stephane, Raes, Jeroen, Sieracki, Michael E, Speich, Sabrina, Stemmann, Lars, Sunagawa, Shinichi, Weissenbach, Jean, Wincker, Patrick, and Karsenti, Eric

Abstract

Marine plankton support global biological and geochemical processes. Surveys of their biodiversity have hitherto been geographically restricted and have not accounted for the full range of plankton size.We assessed eukaryotic diversity from 334 size-fractionated photic-zone plankton communities collected across tropical and temperate oceans during the circumglobal Tara Oceans expedition.We analyzed 18S ribosomal DNA sequences across the intermediate plankton-size spectrum from the smallest unicellular eukaryotes (protists, >0.8 micrometers) to small animals of a few millimeters. Eukaryotic ribosomal diversity saturated at ∼150,000 operational taxonomic units, about one-third of which could not be assigned to known eukaryotic groups. Diversity emerged at all taxonomic levels, both within the groups comprising the ∼11,200 cataloged morphospecies of eukaryotic plankton and among twice as many other deep-branching lineages of unappreciated importance in plankton ecology studies. Most eukaryotic plankton biodiversity belonged to heterotrophic protistan groups, particularly those known to be parasites or symbiotic hosts.

40. Factors regulating transitions among life cycle phases in the marine pennate diatom Pseudo-nitzschia multistriata

Author

Scalco, Eleonora and Scalco, Eleonora

Abstract

The marine pennate diatom Pseudo-nitzschia multistriata has a heterothallic life cycle and the two mating types ('+' and '-') need to be in contact to allow sexual reproduction to occur. In this thesis, results 'are presented of an investigation using con focal and time lapse microscopy aimed at describing the different stages of the life cycle of this species. Results are also presented of various experiments aimed at defining the endogenous and exogenous factors that induce sexual, reproduction. Parental strains need to reach a certain cell density before undergoing sexual reproduction and an inverse correlation was observed between the inoculum size and the time required for the induction of sexual reproduction. This suggests that sexual reproduction is a density-dependent event, regulated by a chemical mediator. Support for this latter hypothesis was provided by experiments on single parental strains which underwent gametogenesis and formation of gametes when exposed to culture medium conditioned by the growth of the opposite mating type. Other support was provided by the fact that sexual reproduction was considerably reduced in cultures incubated in mixed conditions versus still ones. In the latter experimental setting, cells could settle to the bottom, therefore increasing their density and facilitating the onset of the sexual phase. Evidence was also obtained to support the hypothesis that chemical compounds produced during sexual reproduction might reduce the growth of parental strains. The results obtained in the project have provided novel insights into the mechanisms that regulate the life cycle of this planktonic diatom, showing that the transition from vegetative to sexual phase is regulated by chemical mediators. This information represents an experimental background that will allow future studies, aimed at the characterization of the chemical signalling molecules and/or at molecular investigation, to characterize the genes involved in the diffe

41. Factors regulating transitions among life cycle phases in the marine pennate diatom Pseudo-nitzschia multistriata

Author

Scalco, Eleonora and Scalco, Eleonora

Abstract

The marine pennate diatom Pseudo-nitzschia multistriata has a heterothallic life cycle and the two mating types ('+' and '-') need to be in contact to allow sexual reproduction to occur. In this thesis, results 'are presented of an investigation using con focal and time lapse microscopy aimed at describing the different stages of the life cycle of this species. Results are also presented of various experiments aimed at defining the endogenous and exogenous factors that induce sexual, reproduction. Parental strains need to reach a certain cell density before undergoing sexual reproduction and an inverse correlation was observed between the inoculum size and the time required for the induction of sexual reproduction. This suggests that sexual reproduction is a density-dependent event, regulated by a chemical mediator. Support for this latter hypothesis was provided by experiments on single parental strains which underwent gametogenesis and formation of gametes when exposed to culture medium conditioned by the growth of the opposite mating type. Other support was provided by the fact that sexual reproduction was considerably reduced in cultures incubated in mixed conditions versus still ones. In the latter experimental setting, cells could settle to the bottom, therefore increasing their density and facilitating the onset of the sexual phase. Evidence was also obtained to support the hypothesis that chemical compounds produced during sexual reproduction might reduce the growth of parental strains. The results obtained in the project have provided novel insights into the mechanisms that regulate the life cycle of this planktonic diatom, showing that the transition from vegetative to sexual phase is regulated by chemical mediators. This information represents an experimental background that will allow future studies, aimed at the characterization of the chemical signalling molecules and/or at molecular investigation, to characterize the genes involved in the diffe

42. Ocean plankton. Eukaryotic plankton diversity in the sunlit ocean.

Author

de Vargas C, Audic S, Henry N, Decelle J, Mahé F, Logares R, Lara E, Berney C, Le Bescot N, Probert I, Carmichael M, Poulain J, Romac S, Colin S, Aury JM, Bittner L, Chaffron S, Dunthorn M, Engelen S, Flegontova O, Guidi L, Horák A, Jaillon O, Lima-Mendez G, Lukeš J, Malviya S, Morard R, Mulot M, Scalco E, Siano R, Vincent F, Zingone A, Dimier C, Picheral M, Searson S, Kandels-Lewis S, Acinas SG, Bork P, Bowler C, Gorsky G, Grimsley N, Hingamp P, Iudicone D, Not F, Ogata H, Pesant S, Raes J, Sieracki ME, Speich S, Stemmann L, Sunagawa S, Weissenbach J, Wincker P, and Karsenti E

Subjects
Animals, DNA Barcoding, Taxonomic, DNA, Ribosomal genetics, Eukaryota genetics, Oceans and Seas, Phylogeny, Plankton genetics, Ribosomes genetics, Sequence Analysis, DNA, Sunlight, Biodiversity, Eukaryota classification, Plankton classification
Abstract

Marine plankton support global biological and geochemical processes. Surveys of their biodiversity have hitherto been geographically restricted and have not accounted for the full range of plankton size. We assessed eukaryotic diversity from 334 size-fractionated photic-zone plankton communities collected across tropical and temperate oceans during the circumglobal Tara Oceans expedition. We analyzed 18S ribosomal DNA sequences across the intermediate plankton-size spectrum from the smallest unicellular eukaryotes (protists, >0.8 micrometers) to small animals of a few millimeters. Eukaryotic ribosomal diversity saturated at ~150,000 operational taxonomic units, about one-third of which could not be assigned to known eukaryotic groups. Diversity emerged at all taxonomic levels, both within the groups comprising the ~11,200 cataloged morphospecies of eukaryotic plankton and among twice as many other deep-branching lineages of unappreciated importance in plankton ecology studies. Most eukaryotic plankton biodiversity belonged to heterotrophic protistan groups, particularly those known to be parasites or symbiotic hosts., (Copyright © 2015, American Association for the Advancement of Science.)

Published
2015
Full Text
View/download PDF

43. Ocean plankton. Environmental characteristics of Agulhas rings affect interocean plankton transport.

Author

Villar E, Farrant GK, Follows M, Garczarek L, Speich S, Audic S, Bittner L, Blanke B, Brum JR, Brunet C, Casotti R, Chase A, Dolan JR, d'Ortenzio F, Gattuso JP, Grima N, Guidi L, Hill CN, Jahn O, Jamet JL, Le Goff H, Lepoivre C, Malviya S, Pelletier E, Romagnan JB, Roux S, Santini S, Scalco E, Schwenck SM, Tanaka A, Testor P, Vannier T, Vincent F, Zingone A, Dimier C, Picheral M, Searson S, Kandels-Lewis S, Acinas SG, Bork P, Boss E, de Vargas C, Gorsky G, Ogata H, Pesant S, Sullivan MB, Sunagawa S, Wincker P, Karsenti E, Bowler C, Not F, Hingamp P, and Iudicone D

Subjects
Atlantic Ocean, DNA, Ribosomal genetics, Genetic Variation, Indian Ocean, Metagenomics, Nitrites metabolism, Nitrogen metabolism, Plankton genetics, Plankton metabolism, Selection, Genetic, Plankton physiology, Seawater
Abstract

Agulhas rings provide the principal route for ocean waters to circulate from the Indo-Pacific to the Atlantic basin. Their influence on global ocean circulation is well known, but their role in plankton transport is largely unexplored. We show that, although the coarse taxonomic structure of plankton communities is continuous across the Agulhas choke point, South Atlantic plankton diversity is altered compared with Indian Ocean source populations. Modeling and in situ sampling of a young Agulhas ring indicate that strong vertical mixing drives complex nitrogen cycling, shaping community metabolism and biogeochemical signatures as the ring and associated plankton transit westward. The peculiar local environment inside Agulhas rings may provide a selective mechanism contributing to the limited dispersal of Indian Ocean plankton populations into the Atlantic., (Copyright © 2015, American Association for the Advancement of Science.)

Published
2015
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results