square

Eukaryotic plankton diversity in the sunlit ocean

05/22/2015
Science
348 (6237) pp. 1261605

Type

Article dans des revues

Authors

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
Lukes Julius
Malviya Shruti
Morard Raphaël
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 Gaby
Grimsley Nigel
Hingamp Pascal
Iudicone Daniele
Not Fabrice
Ogata Hiroyuki
Stemmann Lars
Sunagawa Shinichi
Weissenbach Jean
Wincker Patrick
Karsenti Eric

Marine plankton support global biological and geochemical processes. Surveys of their biodiversity have hitherto been geo- graphically 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 small- est 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 lin- eages 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.