Rapid diversification underlying the global dominance of a cosmopolitan phytoplankton
International audience Abstract Marine phytoplankton play important roles in the global ecosystem, with a limited number of cosmopolitan keystone species driving their biomass. Recent studies have revealed that many of these phytoplankton are complexes composed of sibling species, but little is know...
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Online Access: | https://hal.science/hal-03984673 https://hal.science/hal-03984673/document https://hal.science/hal-03984673/file/2022%20Bendif%20ISME.pdf https://doi.org/10.1038/s41396-023-01365-5 |
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ftunivnantes:oai:HAL:hal-03984673v1 2023-05-15T16:41:12+02:00 Rapid diversification underlying the global dominance of a cosmopolitan phytoplankton Bendif, El Mahdi Probert, Ian Archontikis, Odysseas, Young, Jeremy, Beaufort, Luc, Rickaby, Rosalind, Filatov, Dmitry Centre européen de recherche et d'enseignement des géosciences de l'environnement (CEREGE) Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) 2023-02-06 https://hal.science/hal-03984673 https://hal.science/hal-03984673/document https://hal.science/hal-03984673/file/2022%20Bendif%20ISME.pdf https://doi.org/10.1038/s41396-023-01365-5 en eng HAL CCSD Nature Publishing Group info:eu-repo/semantics/altIdentifier/doi/10.1038/s41396-023-01365-5 hal-03984673 https://hal.science/hal-03984673 https://hal.science/hal-03984673/document https://hal.science/hal-03984673/file/2022%20Bendif%20ISME.pdf doi:10.1038/s41396-023-01365-5 info:eu-repo/semantics/OpenAccess ISSN: 1751-7362 EISSN: 1751-7370 ISME Journal https://hal.science/hal-03984673 ISME Journal, 2023, ⟨10.1038/s41396-023-01365-5⟩ [SDV.BID]Life Sciences [q-bio]/Biodiversity [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2023 ftunivnantes https://doi.org/10.1038/s41396-023-01365-5 2023-02-22T00:47:46Z International audience Abstract Marine phytoplankton play important roles in the global ecosystem, with a limited number of cosmopolitan keystone species driving their biomass. Recent studies have revealed that many of these phytoplankton are complexes composed of sibling species, but little is known about the evolutionary processes underlying their formation. Gephyrocapsa huxleyi , a widely distributed and abundant unicellular marine planktonic algae, produces calcified scales (coccoliths), thereby significantly affects global biogeochemical cycles via sequestration of inorganic carbon. This species is composed of morphotypes defined by differing degrees of coccolith calcification, the evolutionary ecology of which remains unclear. Here, we report an integrated morphological, ecological and genomic survey across globally distributed G. huxleyi strains to reconstruct evolutionary relationships between morphotypes in relation to their habitats. While G. huxleyi has been considered a single cosmopolitan species, our analyses demonstrate that it has evolved to comprise at least three distinct species, which led us to formally revise the taxonomy of the G. huxleyi complex. Moreover, the first speciation event occurred before the onset of the last interglacial period (~140 ka), while the second followed during this interglacial. Then, further rapid diversifications occurred during the most recent ice-sheet expansion of the last glacial period and established morphotypes as dominant populations across environmental clines. These results suggest that glacial-cycle dynamics contributed to the isolation of ocean basins and the segregations of oceans fronts as extrinsic drivers of micro-evolutionary radiations in extant marine phytoplankton. Article in Journal/Newspaper Ice Sheet Université de Nantes: HAL-UNIV-NANTES The ISME Journal |
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Open Polar |
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Université de Nantes: HAL-UNIV-NANTES |
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ftunivnantes |
language |
English |
topic |
[SDV.BID]Life Sciences [q-bio]/Biodiversity [SDE]Environmental Sciences |
spellingShingle |
[SDV.BID]Life Sciences [q-bio]/Biodiversity [SDE]Environmental Sciences Bendif, El Mahdi Probert, Ian Archontikis, Odysseas, Young, Jeremy, Beaufort, Luc, Rickaby, Rosalind, Filatov, Dmitry Rapid diversification underlying the global dominance of a cosmopolitan phytoplankton |
topic_facet |
[SDV.BID]Life Sciences [q-bio]/Biodiversity [SDE]Environmental Sciences |
description |
International audience Abstract Marine phytoplankton play important roles in the global ecosystem, with a limited number of cosmopolitan keystone species driving their biomass. Recent studies have revealed that many of these phytoplankton are complexes composed of sibling species, but little is known about the evolutionary processes underlying their formation. Gephyrocapsa huxleyi , a widely distributed and abundant unicellular marine planktonic algae, produces calcified scales (coccoliths), thereby significantly affects global biogeochemical cycles via sequestration of inorganic carbon. This species is composed of morphotypes defined by differing degrees of coccolith calcification, the evolutionary ecology of which remains unclear. Here, we report an integrated morphological, ecological and genomic survey across globally distributed G. huxleyi strains to reconstruct evolutionary relationships between morphotypes in relation to their habitats. While G. huxleyi has been considered a single cosmopolitan species, our analyses demonstrate that it has evolved to comprise at least three distinct species, which led us to formally revise the taxonomy of the G. huxleyi complex. Moreover, the first speciation event occurred before the onset of the last interglacial period (~140 ka), while the second followed during this interglacial. Then, further rapid diversifications occurred during the most recent ice-sheet expansion of the last glacial period and established morphotypes as dominant populations across environmental clines. These results suggest that glacial-cycle dynamics contributed to the isolation of ocean basins and the segregations of oceans fronts as extrinsic drivers of micro-evolutionary radiations in extant marine phytoplankton. |
author2 |
Centre européen de recherche et d'enseignement des géosciences de l'environnement (CEREGE) Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Bendif, El Mahdi Probert, Ian Archontikis, Odysseas, Young, Jeremy, Beaufort, Luc, Rickaby, Rosalind, Filatov, Dmitry |
author_facet |
Bendif, El Mahdi Probert, Ian Archontikis, Odysseas, Young, Jeremy, Beaufort, Luc, Rickaby, Rosalind, Filatov, Dmitry |
author_sort |
Bendif, El Mahdi |
title |
Rapid diversification underlying the global dominance of a cosmopolitan phytoplankton |
title_short |
Rapid diversification underlying the global dominance of a cosmopolitan phytoplankton |
title_full |
Rapid diversification underlying the global dominance of a cosmopolitan phytoplankton |
title_fullStr |
Rapid diversification underlying the global dominance of a cosmopolitan phytoplankton |
title_full_unstemmed |
Rapid diversification underlying the global dominance of a cosmopolitan phytoplankton |
title_sort |
rapid diversification underlying the global dominance of a cosmopolitan phytoplankton |
publisher |
HAL CCSD |
publishDate |
2023 |
url |
https://hal.science/hal-03984673 https://hal.science/hal-03984673/document https://hal.science/hal-03984673/file/2022%20Bendif%20ISME.pdf https://doi.org/10.1038/s41396-023-01365-5 |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
ISSN: 1751-7362 EISSN: 1751-7370 ISME Journal https://hal.science/hal-03984673 ISME Journal, 2023, ⟨10.1038/s41396-023-01365-5⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1038/s41396-023-01365-5 hal-03984673 https://hal.science/hal-03984673 https://hal.science/hal-03984673/document https://hal.science/hal-03984673/file/2022%20Bendif%20ISME.pdf doi:10.1038/s41396-023-01365-5 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1038/s41396-023-01365-5 |
container_title |
The ISME Journal |
_version_ |
1766031635595132928 |