Articles | Volume 22, issue 22
https://doi.org/10.5194/bg-22-7205-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-22-7205-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
25 Nov 2025
Research article |
| 25 Nov 2025
| 25 Nov 2025
Response of phytoplankton communities to the onset of the 2020 summer marine heatwave in the Drake Passage and Antarctic Peninsula
Andrés S. Rigual-Hernández
CORRESPONDING AUTHOR
Área de Paleontología, Departamento de Geología, Universidad de Salamanca, 37008 Salamanca, Spain
Amy Leventer
Department of Geology, Colgate University, Hamilton, NY, USA
Manuel Fernández-Barba
Department of Ecology and Coastal Management, Institute of Marine Sciences of Andalusia (ICMAN), Spanish National Research Council (CSIC), 11519 Puerto Real, Cádiz, Spain
José A. Flores
Área de Paleontología, Departamento de Geología, Universidad de Salamanca, 37008 Salamanca, Spain
Gabriel Navarro
Department of Ecology and Coastal Management, Institute of Marine Sciences of Andalusia (ICMAN), Spanish National Research Council (CSIC), 11519 Puerto Real, Cádiz, Spain
Johan Etourneau
University of Bordeaux, CNRS, Bordeaux INP, EPOC, UMR 5805, Pessac, France
Dimitris Evangelinos
GRC Geociències Marines, Departament de Dinàmica de la Terra i de l'Oceà, Universitat de Barcelona, Barcelona, Spain
Department of Earth Science and Engineering, Imperial College London, London, UK
Megan Duffy
Department of Geology, Colgate University, Hamilton, NY, USA
Carlota Escutia
Instituto Andaluz de Ciencias de la Tierra (IACT-CSIC), Armilla, Spain
Fernando Bohoyo
Instituto Geológico y Minero de España (IGME-CSIC), Madrid, Spain
José M. Sánchez-Santos
Departamento de Estadística, Universidad de Salamanca, 37008 Salamanca, Spain
Manon Sabourdy
University of Bordeaux, CNRS, Bordeaux INP, EPOC, UMR 5805, Pessac, France
Laboratoire des Sciences du Climat et de l'Environnement, LSCE/IPSL, UMR CEA-CNRS-UVSQ 8212 CEA Saclay, Gif sur Yvette, France
Francisco J. Jiménez-Espejo
Instituto Andaluz de Ciencias de la Tierra (IACT-CSIC), Armilla, Spain
María A. Bárcena
Área de Paleontología, Departamento de Geología, Universidad de Salamanca, 37008 Salamanca, Spain
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Kate E. Ashley, Robert McKay, Johan Etourneau, Francisco J. Jimenez-Espejo, Alan Condron, Anna Albot, Xavier Crosta, Christina Riesselman, Osamu Seki, Guillaume Massé, Nicholas R. Golledge, Edward Gasson, Daniel P. Lowry, Nicholas E. Barrand, Katelyn Johnson, Nancy Bertler, Carlota Escutia, Robert Dunbar, and James A. Bendle
Clim. Past, 17, 1–19, https://doi.org/10.5194/cp-17-1-2021, https://doi.org/10.5194/cp-17-1-2021, 2021
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Short summary
We studied the abundance and composition of key phytoplankton groups in the Drake Passage and Antarctic Peninsula before and during a marine heatwave in summer 2020. An anticyclonic eddy transported warmer waters into the southern Drake Passage. This led to higher diatom abundance and an increase in the abundance of a small diatom species in the southern Drake Passage while reducing coccolithophore populations. The consequences on marine ecosystems and biogeochemical cycles remain uncertain.
We studied the abundance and composition of key phytoplankton groups in the Drake Passage and...
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