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Plankton networks driving carbon export in the oligotrophic ocean

10/02/2016
Nature
532 pp. 465-470

Type

Article dans des revues

Auteurs

Guidi Lionel
Chaffron Samuel
Bittner Lucie
Eveillard Damien
Larhlimi Abdelhalim
Roux Simon
Darzi Youssef
Audic Stéphane
Berline Léo
Brum Jennifer R
Coelho Luis Pedro
Ignacio-Espinosa J. Cesar
Malviya Shruti
Sunagawa Shinichi
Dimier Céline
Kandels-Lewis Stefanie
Picheral Marc
Poulain Julie
Searson Sarah
Tara Oceans Coordinators
Stemmann Lars
Not Fabrice
Hingamp Pascal
Speich Sabrina
Follows Michael
Karp-Boss Lee
Boss Emmanuel
Ogata Hiroyuki
Pesant Stéphane
Weissenbach Jean
Wincker Patrick
Acinas Silvia G.
Bork Peer
De Vargas Colomban
Iudicone Daniele
Sullivan Matthew B
Raes Jeroen
Karsenti Eric
Bowler Chris
Gorsky Gaby

The biological carbon pump is the process by which CO2 is transformed to organic carbon via photosynthesis, exported through sinking particles, and finally sequestered in the deep ocean. While the intensity of the pump correlates with plankton community composition, the underlying ecosystem structure driving the process remains largely uncharacterized. Here we use environmental and metagenomic data gathered during the Tara Oceans expedition to improve our understanding of carbon export in the oligotrophic ocean. We show that specific plankton communities, from the surface and deep chlorophyll maximum, correlate with carbon export at 150 m and highlight unexpected taxa such as Radiolaria and alveolate parasites, as well as Synechococcus and their phages, as lineages most strongly associated with carbon export in the subtropical, nutrient-depleted, oligotrophic ocean. Additionally, we show that the relative abundance of a few bacterial and viral genes can predict a significant fraction of the variability in carbon export in these regions.