The rapid divergence of the Antarctic crinoid species Promachocrinus kerguelensis
Climatic oscillations in Antarctica caused a succession of expansion and reduction of the ice sheets covering the continental shelf of the Southern Ocean. For marine invertebrates, these successions are suspected to have driven allopatric speciation, endemism and the prevalence of cryptic species, l...
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ftunivantilles:oai:HAL:hal-03090218v1 2024-05-19T07:32:17+00:00 The rapid divergence of the Antarctic crinoid species Promachocrinus kerguelensis Chehida, Yacine Ben Eléaume, Marc Gallut, Cyril Achaz, Guillaume Groningen Institute for Evolutionary Life Sciences Groningen (GELIFES) University of Groningen Groningen Institut de Systématique, Evolution, Biodiversité (ISYEB ) Muséum national d'Histoire naturelle (MNHN)-École Pratique des Hautes Études (EPHE) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA) 2020-12-29 https://hal.science/hal-03090218 https://doi.org/10.1101/666248 en eng HAL CCSD info:eu-repo/semantics/altIdentifier/doi/10.1101/666248 hal-03090218 https://hal.science/hal-03090218 doi:10.1101/666248 https://hal.science/hal-03090218 2020 [SDE]Environmental Sciences [SDV]Life Sciences [q-bio] info:eu-repo/semantics/preprint Preprints, Working Papers, . 2020 ftunivantilles https://doi.org/10.1101/666248 2024-04-25T00:03:22Z Climatic oscillations in Antarctica caused a succession of expansion and reduction of the ice sheets covering the continental shelf of the Southern Ocean. For marine invertebrates, these successions are suspected to have driven allopatric speciation, endemism and the prevalence of cryptic species, leading to the so-called Antarctic ‘biodiversity pump’ hypothesis. Here we took advantage of the recent sampling effort influenced by the International Polar Year (2007-8) to test for the validity of this hypothesis for 1,797 samples of two recognized crinoid species: Promachocrinus kerguelensis and Florometra mawsoni . Species delimitation analysis identified seven phylogroups. As previously suggested, Promachocrinus kerguelensis forms a complex of six cryptic species. Conversely, despite the morphological differences, our results show that Florometra mawsoni is a lineage nested within Promachocrinus kerguelensis . It suggests that Florometra mawsoni and Promachocrinus kerguelensis belong to the same complex of species. Furthermore, this study indicates that over time and space the different sectors of the Southern Ocean show a remarkable rapid turn-over in term of phylogroups composition and also of genetic variants within phylogroups. We argue that strong “apparent” genetic drift causes this rapid genetic turn-over. Finally, we dated the last common ancestor of all phylogroups at less than 1,000 years, raising doubts on the relevance of the Antarctic “biodiversity pump” for this complex of species. This work is a first step towards a better understanding of how life is diversifying in the Southern Ocean. Report Antarc* Antarctic Antarctica International Polar Year Southern Ocean Université des Antilles (UAG): HAL |
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Open Polar |
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Université des Antilles (UAG): HAL |
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ftunivantilles |
language |
English |
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[SDE]Environmental Sciences [SDV]Life Sciences [q-bio] |
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[SDE]Environmental Sciences [SDV]Life Sciences [q-bio] Chehida, Yacine Ben Eléaume, Marc Gallut, Cyril Achaz, Guillaume The rapid divergence of the Antarctic crinoid species Promachocrinus kerguelensis |
topic_facet |
[SDE]Environmental Sciences [SDV]Life Sciences [q-bio] |
description |
Climatic oscillations in Antarctica caused a succession of expansion and reduction of the ice sheets covering the continental shelf of the Southern Ocean. For marine invertebrates, these successions are suspected to have driven allopatric speciation, endemism and the prevalence of cryptic species, leading to the so-called Antarctic ‘biodiversity pump’ hypothesis. Here we took advantage of the recent sampling effort influenced by the International Polar Year (2007-8) to test for the validity of this hypothesis for 1,797 samples of two recognized crinoid species: Promachocrinus kerguelensis and Florometra mawsoni . Species delimitation analysis identified seven phylogroups. As previously suggested, Promachocrinus kerguelensis forms a complex of six cryptic species. Conversely, despite the morphological differences, our results show that Florometra mawsoni is a lineage nested within Promachocrinus kerguelensis . It suggests that Florometra mawsoni and Promachocrinus kerguelensis belong to the same complex of species. Furthermore, this study indicates that over time and space the different sectors of the Southern Ocean show a remarkable rapid turn-over in term of phylogroups composition and also of genetic variants within phylogroups. We argue that strong “apparent” genetic drift causes this rapid genetic turn-over. Finally, we dated the last common ancestor of all phylogroups at less than 1,000 years, raising doubts on the relevance of the Antarctic “biodiversity pump” for this complex of species. This work is a first step towards a better understanding of how life is diversifying in the Southern Ocean. |
author2 |
Groningen Institute for Evolutionary Life Sciences Groningen (GELIFES) University of Groningen Groningen Institut de Systématique, Evolution, Biodiversité (ISYEB ) Muséum national d'Histoire naturelle (MNHN)-École Pratique des Hautes Études (EPHE) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA) |
format |
Report |
author |
Chehida, Yacine Ben Eléaume, Marc Gallut, Cyril Achaz, Guillaume |
author_facet |
Chehida, Yacine Ben Eléaume, Marc Gallut, Cyril Achaz, Guillaume |
author_sort |
Chehida, Yacine Ben |
title |
The rapid divergence of the Antarctic crinoid species Promachocrinus kerguelensis |
title_short |
The rapid divergence of the Antarctic crinoid species Promachocrinus kerguelensis |
title_full |
The rapid divergence of the Antarctic crinoid species Promachocrinus kerguelensis |
title_fullStr |
The rapid divergence of the Antarctic crinoid species Promachocrinus kerguelensis |
title_full_unstemmed |
The rapid divergence of the Antarctic crinoid species Promachocrinus kerguelensis |
title_sort |
rapid divergence of the antarctic crinoid species promachocrinus kerguelensis |
publisher |
HAL CCSD |
publishDate |
2020 |
url |
https://hal.science/hal-03090218 https://doi.org/10.1101/666248 |
genre |
Antarc* Antarctic Antarctica International Polar Year Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica International Polar Year Southern Ocean |
op_source |
https://hal.science/hal-03090218 2020 |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1101/666248 hal-03090218 https://hal.science/hal-03090218 doi:10.1101/666248 |
op_doi |
https://doi.org/10.1101/666248 |
_version_ |
1799470284054462464 |