Restructuring of plankton genomic biogeography in the surface ocean under climate change

Paul Frémont (), Marion Gehlen (), Mathieu Vrac, Jade Leconte, Tom O. Delmont, Patrick Wincker, Daniele Iudicone and Olivier Jaillon ()
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Paul Frémont: CEA, CNRS, Université d’Evry, Université Paris-Saclay
Marion Gehlen: CEA, CNRS, Université Paris-Saclay
Mathieu Vrac: CEA, CNRS, Université Paris-Saclay
Jade Leconte: CEA, CNRS, Université d’Evry, Université Paris-Saclay
Tom O. Delmont: CEA, CNRS, Université d’Evry, Université Paris-Saclay
Patrick Wincker: CEA, CNRS, Université d’Evry, Université Paris-Saclay
Daniele Iudicone: Stazione Zoologica Anton Dhorn
Olivier Jaillon: CEA, CNRS, Université d’Evry, Université Paris-Saclay

Nature Climate Change, 2022, vol. 12, issue 4, 393-401

Abstract: Abstract The impact of climate change on diversity, functioning and biogeography of marine plankton remains a major unresolved issue. Here environmental niches are evidenced for plankton communities at the genomic scale for six size fractions from viruses to meso-zooplankton. The spatial extrapolation of these niches portrays ocean partitionings south of 60° N into climato-genomic provinces characterized by signature genomes. By 2090, under the RCP8.5 future climate scenario, provinces are reorganized over half of the ocean area considered, and almost all provinces are displaced poleward. Particularly, tropical provinces expand at the expense of temperate ones. Sea surface temperature is identified as the main driver of changes (50%), followed by phosphate (11%) and salinity (10%). Compositional shifts among key planktonic groups suggest impacts on the nitrogen and carbon cycles. Provinces are linked to estimates of carbon export fluxes which are projected to decrease, on average, by 4% in response to biogeographical restructuring.

Date: 2022
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DOI: 10.1038/s41558-022-01314-8

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