Divergent ecological histories of two sister Antarctic krill species led to contrasted patterns of genetic diversity in their heat-shock protein (hsp70) arsenal
International audience The Arctic and the Antarctic Peninsula are currently experiencing some of the most rapid rates of ocean warming on the planet. This raises the question of how the initial adaptation to extreme cold temperatures was put in place and whether or not directional selection has led...
Published in: | Ecology and Evolution |
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Main Authors: | , , , |
Other Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2016
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Subjects: | |
Online Access: | https://hal.sorbonne-universite.fr/hal-01275246 https://hal.sorbonne-universite.fr/hal-01275246/document https://hal.sorbonne-universite.fr/hal-01275246/file/ece31989.pdf https://doi.org/10.1002/ece3.1989 |
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ftccsdartic:oai:HAL:hal-01275246v1 |
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Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
krill sweep thermal adaptation Correspondence Balancing selection duplication heat-shock proteins [SDE.BE]Environmental Sciences/Biodiversity and Ecology |
spellingShingle |
krill sweep thermal adaptation Correspondence Balancing selection duplication heat-shock proteins [SDE.BE]Environmental Sciences/Biodiversity and Ecology Papot, Claire Cascella, Kévin Toullec, Jean-Yves Jollivet, Didier Divergent ecological histories of two sister Antarctic krill species led to contrasted patterns of genetic diversity in their heat-shock protein (hsp70) arsenal |
topic_facet |
krill sweep thermal adaptation Correspondence Balancing selection duplication heat-shock proteins [SDE.BE]Environmental Sciences/Biodiversity and Ecology |
description |
International audience The Arctic and the Antarctic Peninsula are currently experiencing some of the most rapid rates of ocean warming on the planet. This raises the question of how the initial adaptation to extreme cold temperatures was put in place and whether or not directional selection has led to the loss of genetic variation at key adaptive systems, and thus polar species’ (re)adaptability to higher temperatures. In the Southern Ocean, krill represents the most abundant fauna and is a critical member at the base of the Antarctic food web. To better understand the role of selection in shaping current patterns of polymorphisms, we examined genetic diversity of the cox-1 and hsp70 genes by comparing two closely related species of Euphausiid that differ in ecology. Results on mtcox-1 agreed with previous studies, indicating high and similar effective population sizes. However, a coalescent-based approach on hsp70 genes highlighted the role of positive selection and past demographic changes in their recent evolution. Firstly, some form of balancing selection was acting on the inducible isoform C, which reflected the maintenance of an ancestral adaptive polymorphism in both species. Secondly, E. crystallorophias seems to have lost most of its hsp70 diversity because of a population crash and/or directional selection to cold. Nonsynonymous diversities were always greater in E. superba, suggesting that it might have evolved under more heterogeneous conditions. This can be linked to species’ ecology with E. superba living in more variable pelagic conditions, while E. crystallorophias is strictly associated with continental shelves and sea ice. |
author2 |
Laboratoire de Génétique et Evolution des Populations Végétales Université de Lille, Sciences et Technologies-Centre National de la Recherche Scientifique (CNRS) Adaptation et Biologie des Invertébrés en Conditions Extrêmes (ABICE) Adaptation et diversité en milieu marin (AD2M) 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)-Centre National de la Recherche Scientifique (CNRS)-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)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Papot, Claire Cascella, Kévin Toullec, Jean-Yves Jollivet, Didier |
author_facet |
Papot, Claire Cascella, Kévin Toullec, Jean-Yves Jollivet, Didier |
author_sort |
Papot, Claire |
title |
Divergent ecological histories of two sister Antarctic krill species led to contrasted patterns of genetic diversity in their heat-shock protein (hsp70) arsenal |
title_short |
Divergent ecological histories of two sister Antarctic krill species led to contrasted patterns of genetic diversity in their heat-shock protein (hsp70) arsenal |
title_full |
Divergent ecological histories of two sister Antarctic krill species led to contrasted patterns of genetic diversity in their heat-shock protein (hsp70) arsenal |
title_fullStr |
Divergent ecological histories of two sister Antarctic krill species led to contrasted patterns of genetic diversity in their heat-shock protein (hsp70) arsenal |
title_full_unstemmed |
Divergent ecological histories of two sister Antarctic krill species led to contrasted patterns of genetic diversity in their heat-shock protein (hsp70) arsenal |
title_sort |
divergent ecological histories of two sister antarctic krill species led to contrasted patterns of genetic diversity in their heat-shock protein (hsp70) arsenal |
publisher |
HAL CCSD |
publishDate |
2016 |
url |
https://hal.sorbonne-universite.fr/hal-01275246 https://hal.sorbonne-universite.fr/hal-01275246/document https://hal.sorbonne-universite.fr/hal-01275246/file/ece31989.pdf https://doi.org/10.1002/ece3.1989 |
geographic |
Arctic Antarctic Southern Ocean The Antarctic Antarctic Peninsula |
geographic_facet |
Arctic Antarctic Southern Ocean The Antarctic Antarctic Peninsula |
genre |
Antarc* Antarctic Antarctic Krill Antarctic Peninsula Arctic Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Krill Antarctic Peninsula Arctic Sea ice Southern Ocean |
op_source |
ISSN: 2045-7758 Ecology and Evolution https://hal.sorbonne-universite.fr/hal-01275246 Ecology and Evolution, Wiley Open Access, 2016, 6 (5), pp.1555-1575 ⟨10.1002/ece3.1989⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1002/ece3.1989 hal-01275246 https://hal.sorbonne-universite.fr/hal-01275246 https://hal.sorbonne-universite.fr/hal-01275246/document https://hal.sorbonne-universite.fr/hal-01275246/file/ece31989.pdf doi:10.1002/ece3.1989 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1002/ece3.1989 |
container_title |
Ecology and Evolution |
container_volume |
6 |
container_issue |
5 |
container_start_page |
1555 |
op_container_end_page |
1575 |
_version_ |
1766272337189011456 |
spelling |
ftccsdartic:oai:HAL:hal-01275246v1 2023-05-15T14:02:12+02:00 Divergent ecological histories of two sister Antarctic krill species led to contrasted patterns of genetic diversity in their heat-shock protein (hsp70) arsenal Papot, Claire Cascella, Kévin Toullec, Jean-Yves Jollivet, Didier Laboratoire de Génétique et Evolution des Populations Végétales Université de Lille, Sciences et Technologies-Centre National de la Recherche Scientifique (CNRS) Adaptation et Biologie des Invertébrés en Conditions Extrêmes (ABICE) Adaptation et diversité en milieu marin (AD2M) 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)-Centre National de la Recherche Scientifique (CNRS)-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)-Centre National de la Recherche Scientifique (CNRS) 2016-02 https://hal.sorbonne-universite.fr/hal-01275246 https://hal.sorbonne-universite.fr/hal-01275246/document https://hal.sorbonne-universite.fr/hal-01275246/file/ece31989.pdf https://doi.org/10.1002/ece3.1989 en eng HAL CCSD Wiley Open Access info:eu-repo/semantics/altIdentifier/doi/10.1002/ece3.1989 hal-01275246 https://hal.sorbonne-universite.fr/hal-01275246 https://hal.sorbonne-universite.fr/hal-01275246/document https://hal.sorbonne-universite.fr/hal-01275246/file/ece31989.pdf doi:10.1002/ece3.1989 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 2045-7758 Ecology and Evolution https://hal.sorbonne-universite.fr/hal-01275246 Ecology and Evolution, Wiley Open Access, 2016, 6 (5), pp.1555-1575 ⟨10.1002/ece3.1989⟩ krill sweep thermal adaptation Correspondence Balancing selection duplication heat-shock proteins [SDE.BE]Environmental Sciences/Biodiversity and Ecology info:eu-repo/semantics/article Journal articles 2016 ftccsdartic https://doi.org/10.1002/ece3.1989 2021-01-31T00:00:18Z International audience The Arctic and the Antarctic Peninsula are currently experiencing some of the most rapid rates of ocean warming on the planet. This raises the question of how the initial adaptation to extreme cold temperatures was put in place and whether or not directional selection has led to the loss of genetic variation at key adaptive systems, and thus polar species’ (re)adaptability to higher temperatures. In the Southern Ocean, krill represents the most abundant fauna and is a critical member at the base of the Antarctic food web. To better understand the role of selection in shaping current patterns of polymorphisms, we examined genetic diversity of the cox-1 and hsp70 genes by comparing two closely related species of Euphausiid that differ in ecology. Results on mtcox-1 agreed with previous studies, indicating high and similar effective population sizes. However, a coalescent-based approach on hsp70 genes highlighted the role of positive selection and past demographic changes in their recent evolution. Firstly, some form of balancing selection was acting on the inducible isoform C, which reflected the maintenance of an ancestral adaptive polymorphism in both species. Secondly, E. crystallorophias seems to have lost most of its hsp70 diversity because of a population crash and/or directional selection to cold. Nonsynonymous diversities were always greater in E. superba, suggesting that it might have evolved under more heterogeneous conditions. This can be linked to species’ ecology with E. superba living in more variable pelagic conditions, while E. crystallorophias is strictly associated with continental shelves and sea ice. Article in Journal/Newspaper Antarc* Antarctic Antarctic Krill Antarctic Peninsula Arctic Sea ice Southern Ocean Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Arctic Antarctic Southern Ocean The Antarctic Antarctic Peninsula Ecology and Evolution 6 5 1555 1575 |