Decline in plankton diversity and carbon flux with reduced sea ice extent along the Western Antarctic Peninsula.

Autor: Lin Y; Division of Earth and Ocean Sciences, Nicholas School of the Environment, Duke University, Durham, NC, USA. yajuan.lin@dukekunshan.edu.cn.; Université de Brest-UMR 6539 CNRS/UBO/IRD/Ifremer, Laboratoire des sciences de l'environnement marin-IUEM, Rue Dumont D'Urville, Plouzané, France. yajuan.lin@dukekunshan.edu.cn.; Environmental Research Center, Duke Kunshan University, Kunshan, China. yajuan.lin@dukekunshan.edu.cn., Moreno C; Department of Marine Sciences, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA., Marchetti A; Department of Marine Sciences, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA., Ducklow H; Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY, USA., Schofield O; Rutgers University's Center for Ocean Observing Leadership (RU COOL), Department of Marine and Coastal Sciences, School of Environmental and Biological Sciences, Rutgers University, New Brunswick, NJ, USA., Delage E; Université de Nantes, CNRS UMR 6004, LS2N, Nantes, France., Meredith M; British Antarctic Survey, Cambridge, United Kingdom., Li Z; Division of Earth and Ocean Sciences, Nicholas School of the Environment, Duke University, Durham, NC, USA.; Applied Ocean Physics and Engineering, Woods Hole Oceanographic Institution, Woods Hole, MA, USA., Eveillard D; Université de Nantes, CNRS UMR 6004, LS2N, Nantes, France.; Research Federation for the Study of Global Ocean Systems Ecology and Evolution, FR2022/Tara Oceans GOSEE, Paris, France., Chaffron S; Université de Nantes, CNRS UMR 6004, LS2N, Nantes, France.; Research Federation for the Study of Global Ocean Systems Ecology and Evolution, FR2022/Tara Oceans GOSEE, Paris, France., Cassar N; Division of Earth and Ocean Sciences, Nicholas School of the Environment, Duke University, Durham, NC, USA. Nicolas.Cassar@duke.edu.; Université de Brest-UMR 6539 CNRS/UBO/IRD/Ifremer, Laboratoire des sciences de l'environnement marin-IUEM, Rue Dumont D'Urville, Plouzané, France. Nicolas.Cassar@duke.edu.
Jazyk: angličtina
Zdroj: Nature communications [Nat Commun] 2021 Aug 16; Vol. 12 (1), pp. 4948. Date of Electronic Publication: 2021 Aug 16.
DOI: 10.1038/s41467-021-25235-w
Abstrakt: Since the middle of the past century, the Western Antarctic Peninsula has warmed rapidly with a significant loss of sea ice but the impacts on plankton biodiversity and carbon cycling remain an open question. Here, using a 5-year dataset of eukaryotic plankton DNA metabarcoding, we assess changes in biodiversity and net community production in this region. Our results show that sea-ice extent is a dominant factor influencing eukaryotic plankton community composition, biodiversity, and net community production. Species richness and evenness decline with an increase in sea surface temperature (SST). In regions with low SST and shallow mixed layers, the community was dominated by a diverse assemblage of diatoms and dinoflagellates. Conversely, less diverse plankton assemblages were observed in waters with higher SST and/or deep mixed layers when sea ice extent was lower. A genetic programming machine-learning model explained up to 80% of the net community production variability at the Western Antarctic Peninsula. Among the biological explanatory variables, the sea-ice environment associated plankton assemblage is the best predictor of net community production. We conclude that eukaryotic plankton diversity and carbon cycling at the Western Antarctic Peninsula are strongly linked to sea-ice conditions.
(© 2021. The Author(s).)
Databáze: MEDLINE
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