Comparative phylogeography of six red algae along the Antarctic Peninsula: extreme genetic depletion linked to historical bottlenecks and recent expansion
International audience In the Southern Ocean, rapid climatic fluctuations during the Quaternary are thought to have induced range contractions and bottlenecks, thereby instigating genetic divergence and potentially even speciation of marine species. Specifically, ice scouring during glacial events m...
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fttriple:oai:gotriple.eu:10670/1.7gehh8 2023-05-15T13:41:25+02:00 Comparative phylogeography of six red algae along the Antarctic Peninsula: extreme genetic depletion linked to historical bottlenecks and recent expansion Guillemin, Marie-Laure Dubrasquet, Hélène Reyes, Janette Valero, Myriam Evolutionary Biology and Ecology of Algae (EBEA) Station biologique de Roscoff Roscoff (SBR) Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Universidad Austral de Chile-Centre National de la Recherche Scientifique (CNRS)-Pontificia Universidad Católica de Chile (UC) 2018-01-01 https://doi.org/10.1007/s00300-017-2244-7 https://hal.sorbonne-universite.fr/hal-01735897/file/POBI%20In%20press%20for%20researchgate.pdf https://hal.sorbonne-universite.fr/hal-01735897 en eng HAL CCSD Springer Verlag hal-01735897 doi:10.1007/s00300-017-2244-7 10670/1.7gehh8 https://hal.sorbonne-universite.fr/hal-01735897/file/POBI%20In%20press%20for%20researchgate.pdf https://hal.sorbonne-universite.fr/hal-01735897 Hyper Article en Ligne - Sciences de l'Homme et de la Société ISSN: 0722-4060 EISSN: 1432-2056 Polar Biology Polar Biology, Springer Verlag, 2018, pp.1-11. ⟨10.1007/s00300-017-2244-7⟩ geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2018 fttriple https://doi.org/10.1007/s00300-017-2244-7 2023-01-22T17:26:18Z International audience In the Southern Ocean, rapid climatic fluctuations during the Quaternary are thought to have induced range contractions and bottlenecks, thereby instigating genetic divergence and potentially even speciation of marine species. Specifically, ice scouring during glacial events may have had drastic impacts on seaweed communities, thus leading to genetic diversification between algal populations that persisted on the Antarctic shelf in small isolated refugia. Using the mitochondrial Cytochrome c Oxidase I (COI) gene and 279 individual macroalgal specimens collected from five geographic areas along the coasts of the Antarctic Peninsula and the South Shetland Islands, we studied the genetic diversity of six commonly encountered species of red algae. All six algae were characterized by very low genetic diversity, and we found a significant signature of recent population expansion of a single haplotype encountered over more than 450 km. These results reflect the drastic impact of historical perturbations on populations of Antarctic seaweeds. We propose that genetic drift during a glacial bottleneck had a strong effect and could have been amplified by gene surfing effects during spatial expansion after ice sheet retreat. This led to the rapid spread of a single haplotype in the recolonized region. Unfortunately, the very low level of genetic diversity encountered did not allow us to precisely pinpoint the putative location of the glacial refugium inhabited by Antarctic seaweeds. Despite this, we propose that future studies should test the role of active volcanic areas, such as Deception Island, as long-term refugia in the region. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Deception Island Ice Sheet Polar Biology South Shetland Islands Southern Ocean Unknown Antarctic Antarctic Peninsula Deception Island ENVELOPE(-60.633,-60.633,-62.950,-62.950) South Shetland Islands Southern Ocean The Antarctic Polar Biology 41 5 827 837 |
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fttriple |
language |
English |
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geo envir |
spellingShingle |
geo envir Guillemin, Marie-Laure Dubrasquet, Hélène Reyes, Janette Valero, Myriam Comparative phylogeography of six red algae along the Antarctic Peninsula: extreme genetic depletion linked to historical bottlenecks and recent expansion |
topic_facet |
geo envir |
description |
International audience In the Southern Ocean, rapid climatic fluctuations during the Quaternary are thought to have induced range contractions and bottlenecks, thereby instigating genetic divergence and potentially even speciation of marine species. Specifically, ice scouring during glacial events may have had drastic impacts on seaweed communities, thus leading to genetic diversification between algal populations that persisted on the Antarctic shelf in small isolated refugia. Using the mitochondrial Cytochrome c Oxidase I (COI) gene and 279 individual macroalgal specimens collected from five geographic areas along the coasts of the Antarctic Peninsula and the South Shetland Islands, we studied the genetic diversity of six commonly encountered species of red algae. All six algae were characterized by very low genetic diversity, and we found a significant signature of recent population expansion of a single haplotype encountered over more than 450 km. These results reflect the drastic impact of historical perturbations on populations of Antarctic seaweeds. We propose that genetic drift during a glacial bottleneck had a strong effect and could have been amplified by gene surfing effects during spatial expansion after ice sheet retreat. This led to the rapid spread of a single haplotype in the recolonized region. Unfortunately, the very low level of genetic diversity encountered did not allow us to precisely pinpoint the putative location of the glacial refugium inhabited by Antarctic seaweeds. Despite this, we propose that future studies should test the role of active volcanic areas, such as Deception Island, as long-term refugia in the region. |
author2 |
Evolutionary Biology and Ecology of Algae (EBEA) Station biologique de Roscoff Roscoff (SBR) Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Universidad Austral de Chile-Centre National de la Recherche Scientifique (CNRS)-Pontificia Universidad Católica de Chile (UC) |
format |
Article in Journal/Newspaper |
author |
Guillemin, Marie-Laure Dubrasquet, Hélène Reyes, Janette Valero, Myriam |
author_facet |
Guillemin, Marie-Laure Dubrasquet, Hélène Reyes, Janette Valero, Myriam |
author_sort |
Guillemin, Marie-Laure |
title |
Comparative phylogeography of six red algae along the Antarctic Peninsula: extreme genetic depletion linked to historical bottlenecks and recent expansion |
title_short |
Comparative phylogeography of six red algae along the Antarctic Peninsula: extreme genetic depletion linked to historical bottlenecks and recent expansion |
title_full |
Comparative phylogeography of six red algae along the Antarctic Peninsula: extreme genetic depletion linked to historical bottlenecks and recent expansion |
title_fullStr |
Comparative phylogeography of six red algae along the Antarctic Peninsula: extreme genetic depletion linked to historical bottlenecks and recent expansion |
title_full_unstemmed |
Comparative phylogeography of six red algae along the Antarctic Peninsula: extreme genetic depletion linked to historical bottlenecks and recent expansion |
title_sort |
comparative phylogeography of six red algae along the antarctic peninsula: extreme genetic depletion linked to historical bottlenecks and recent expansion |
publisher |
HAL CCSD |
publishDate |
2018 |
url |
https://doi.org/10.1007/s00300-017-2244-7 https://hal.sorbonne-universite.fr/hal-01735897/file/POBI%20In%20press%20for%20researchgate.pdf https://hal.sorbonne-universite.fr/hal-01735897 |
long_lat |
ENVELOPE(-60.633,-60.633,-62.950,-62.950) |
geographic |
Antarctic Antarctic Peninsula Deception Island South Shetland Islands Southern Ocean The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula Deception Island South Shetland Islands Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Antarctic Peninsula Deception Island Ice Sheet Polar Biology South Shetland Islands Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Deception Island Ice Sheet Polar Biology South Shetland Islands Southern Ocean |
op_source |
Hyper Article en Ligne - Sciences de l'Homme et de la Société ISSN: 0722-4060 EISSN: 1432-2056 Polar Biology Polar Biology, Springer Verlag, 2018, pp.1-11. ⟨10.1007/s00300-017-2244-7⟩ |
op_relation |
hal-01735897 doi:10.1007/s00300-017-2244-7 10670/1.7gehh8 https://hal.sorbonne-universite.fr/hal-01735897/file/POBI%20In%20press%20for%20researchgate.pdf https://hal.sorbonne-universite.fr/hal-01735897 |
op_doi |
https://doi.org/10.1007/s00300-017-2244-7 |
container_title |
Polar Biology |
container_volume |
41 |
container_issue |
5 |
container_start_page |
827 |
op_container_end_page |
837 |
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1766150637571014656 |