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  • Publication
    Accès libre
    Soil protistology rebooted: 30 fundamental questions to start with
    Geisen, Stefan
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    Wilkinson, David M
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    Adl, Sina
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    Bonkowski, Michael
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    Brown, Matthew W
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    Fiore-Donno, Anna Maria
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    Jassey, Vincent E.J
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    Krashevska, Valentyna
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    Lahr, Daniel J.G
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    Marcisz, Katarzyna
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    Payne, Richard
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    Anderson, Roger O
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    Charman, Dan J
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    Ekelund, Flemming
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    Griffiths, Bryan S
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    Rønn, Regin
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    Smirnov, Alexey
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    Bass, David
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    Berney, Cédric
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    Blandenier, Quentin
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    Chatzinotas, Antonis
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    Clarholm, Marianne
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    Dunthorn, Micah
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    Feest, Alan
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    Fernández, Leonardo D
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    Foissner, Wilhelm
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    Gentekaki, Eleni
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    Hájek, Michal
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    Helder, Johannes
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    Jousset, Alexandre
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    Koller, Robert
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    Kumar, Santosh
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    La Terza, Antonietta
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    Lamentowicz, Mariusz
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    Mazei, Yuri
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    Santos, Susana S
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    Seppey, Christophe V.W
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    Spiegel, Frederick W
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    Walochnik, Julia
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    Winding, Anne
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    Protists are the most diverse eukaryotes. These microbes are keystone organisms of soil ecosystems and regulate essential processes of soil fertility such as nutrient cycling and plant growth. Despite this, protists have received little scientific attention, especially compared to bacteria, fungi and nematodes in soil studies. Recent methodological advances, particularly in molecular biology techniques, have made the study of soil protists more accessible, and have created a resurgence of interest in soil protistology. This ongoing revolution now enables comprehensive investigations of the structure and functioning of soil protist communities, paving the way to a new era in soil biology. Instead of providing an exhaustive review, we provide a synthesis of research gaps that should be prioritized in future studies of soil protistology to guide this rapidly developing research area. Based on a synthesis of expert opinion we propose 30 key questions covering a broad range of topics including evolution, phylogenetics, functional ecology, macroecology, paleoecology, and methodologies. These questions highlight a diversity of topics that will establish soil protistology as a hub discipline connecting different fundamental and applied fields such as ecology, biogeography, evolution, plant-microbe interactions, agronomy, and conservation biology. We are convinced that soil protistology has the potential to be one of the most exciting frontiers in biology.
  • Publication
    Accès libre
    Eukaryotic plankton diversity in the sunlit ocean
    de Vargas, Colomban
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    Audic, Stéphane
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    Henry, Nicolas
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    Decelle, Johan
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    Mahé, Frédéric
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    Logares, Ramiro
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    Berney, Cédric
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    Le Bescot, Noan
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    Probert, Ian
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    Carmichael, Margaux
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    Poulain, Julie
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    Romac, Sarah
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    Colin, Sébastien
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    Aury, Jean-Marc
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    Bittner, Lucie
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    Chaffron, Samuel
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    Dunthorn, Micah
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    Engelen, Stefan
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    Flegontova, Olga
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    Guidi, Lionel
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    Horák, Aleš
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    Jaillon, Olivier
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    Lima-Mendez, Gipsi
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    Lukeš, Julius
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    Malviya, Shruti
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    Morard, Raphael
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    Scalco, Eleonora
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    Siano, Raffaele
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    Vincent, Flora
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    Zingone, Adriana
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    Dimier, Céline
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    Picheral, Marc
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    Searson, Sarah
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    Kandels-Lewis, Stefanie
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    Acinas, Silvia G
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    Bork, Peer
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    Bowler, Chris
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    Gorsky, Gabriel
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    Grimsley, Nigel
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    Hingamp, Pascal
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    Iudicone, Daniele
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    Not, Fabrice
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    Ogata, Hiroyuki
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    Pesant, Stephane
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    Raes, Jeroen
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    Sieracki, Michael E
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    Speich, Sabrina
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    Stemmann, Lars
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    Sunagawa, Shinichi
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    Weissenbach, Jean
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    Wincker, Patrick
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    Karsenti, Eric
    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.