Survivors and colonizers: Contrasting biogeographic histories reconciled in the Antarctic freshwater copepod Boeckella poppei
Two main hypotheses have been proposed to explain the contemporary distribution of Antarctic terrestrial biota. We assess whether the current distribution of maritime Antarctic populations of the freshwater copepod Boeckella poppei is the result of (1) a post-Last Glacial Maximum (LGM) colonization,...
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crfrontiers:10.3389/fevo.2022.1012852 2024-06-23T07:46:18+00:00 Survivors and colonizers: Contrasting biogeographic histories reconciled in the Antarctic freshwater copepod Boeckella poppei Maturana, Claudia S. Biersma, Elisabeth M. Díaz, Angie González-Wevar, Claudio Contador, Tamara Convey, Peter Jackson, Jennifer A. Poulin, Elie 2022 http://dx.doi.org/10.3389/fevo.2022.1012852 https://www.frontiersin.org/articles/10.3389/fevo.2022.1012852/full unknown Frontiers Media SA https://creativecommons.org/licenses/by/4.0/ Frontiers in Ecology and Evolution volume 10 ISSN 2296-701X journal-article 2022 crfrontiers https://doi.org/10.3389/fevo.2022.1012852 2024-06-04T05:55:50Z Two main hypotheses have been proposed to explain the contemporary distribution of Antarctic terrestrial biota. We assess whether the current distribution of maritime Antarctic populations of the freshwater copepod Boeckella poppei is the result of (1) a post-Last Glacial Maximum (LGM) colonization, or whether (2) the species survived in regional glacial refugia throughout the LGM and earlier glaciations. Using 438 specimens from 34 different sampling sites across Southern South America, South Georgia, South Orkney Islands, South Shetland Islands, and the Antarctic Peninsula, we analyzed mitochondrial and nuclear sequences to uncover patterns of genetic diversity and population structure. We also performed median-joining haplotype network, phylogenetic reconstruction, and divergence time analyses. Finally, we evaluated past demographic changes and historical scenarios using the Approximate Bayesian Computation (ABC) method. Our data support the existence of two clades with different and contrasting biogeographic histories. The first clade has been present in maritime Antarctica since at least the mid-Pleistocene, with the South Orkney Islands the most likely refugial area. The second clade has a broader distribution including southern South America, South Georgia, South Shetland Islands, and the Antarctic Peninsula. The ABC method identified long-distance dispersal (LDD) colonization event(s) from southern South America to South Georgia and the maritime Antarctic after the LGM deglaciation, supporting more recent colonization of Antarctic locations. The current Antarctic and sub-Antarctic distribution of B. poppei is likely derived from two independent biogeographic events. The combination of both (1) post-LGM colonization from southern South America and (2) longer-term persistence in in situ regional refugia throughout glacial periods challenges current understanding of the biogeographic history of Antarctic freshwater biota. Re-colonization of ice-impacted Antarctic areas would have occurred following a LDD ... Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica South Orkney Islands South Shetland Islands Frontiers (Publisher) Antarctic Antarctic Peninsula Boeckella ENVELOPE(-56.999,-56.999,-63.404,-63.404) South Orkney Islands ENVELOPE(-45.500,-45.500,-60.583,-60.583) South Shetland Islands The Antarctic Frontiers in Ecology and Evolution 10 |
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Open Polar |
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Frontiers (Publisher) |
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crfrontiers |
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description |
Two main hypotheses have been proposed to explain the contemporary distribution of Antarctic terrestrial biota. We assess whether the current distribution of maritime Antarctic populations of the freshwater copepod Boeckella poppei is the result of (1) a post-Last Glacial Maximum (LGM) colonization, or whether (2) the species survived in regional glacial refugia throughout the LGM and earlier glaciations. Using 438 specimens from 34 different sampling sites across Southern South America, South Georgia, South Orkney Islands, South Shetland Islands, and the Antarctic Peninsula, we analyzed mitochondrial and nuclear sequences to uncover patterns of genetic diversity and population structure. We also performed median-joining haplotype network, phylogenetic reconstruction, and divergence time analyses. Finally, we evaluated past demographic changes and historical scenarios using the Approximate Bayesian Computation (ABC) method. Our data support the existence of two clades with different and contrasting biogeographic histories. The first clade has been present in maritime Antarctica since at least the mid-Pleistocene, with the South Orkney Islands the most likely refugial area. The second clade has a broader distribution including southern South America, South Georgia, South Shetland Islands, and the Antarctic Peninsula. The ABC method identified long-distance dispersal (LDD) colonization event(s) from southern South America to South Georgia and the maritime Antarctic after the LGM deglaciation, supporting more recent colonization of Antarctic locations. The current Antarctic and sub-Antarctic distribution of B. poppei is likely derived from two independent biogeographic events. The combination of both (1) post-LGM colonization from southern South America and (2) longer-term persistence in in situ regional refugia throughout glacial periods challenges current understanding of the biogeographic history of Antarctic freshwater biota. Re-colonization of ice-impacted Antarctic areas would have occurred following a LDD ... |
format |
Article in Journal/Newspaper |
author |
Maturana, Claudia S. Biersma, Elisabeth M. Díaz, Angie González-Wevar, Claudio Contador, Tamara Convey, Peter Jackson, Jennifer A. Poulin, Elie |
spellingShingle |
Maturana, Claudia S. Biersma, Elisabeth M. Díaz, Angie González-Wevar, Claudio Contador, Tamara Convey, Peter Jackson, Jennifer A. Poulin, Elie Survivors and colonizers: Contrasting biogeographic histories reconciled in the Antarctic freshwater copepod Boeckella poppei |
author_facet |
Maturana, Claudia S. Biersma, Elisabeth M. Díaz, Angie González-Wevar, Claudio Contador, Tamara Convey, Peter Jackson, Jennifer A. Poulin, Elie |
author_sort |
Maturana, Claudia S. |
title |
Survivors and colonizers: Contrasting biogeographic histories reconciled in the Antarctic freshwater copepod Boeckella poppei |
title_short |
Survivors and colonizers: Contrasting biogeographic histories reconciled in the Antarctic freshwater copepod Boeckella poppei |
title_full |
Survivors and colonizers: Contrasting biogeographic histories reconciled in the Antarctic freshwater copepod Boeckella poppei |
title_fullStr |
Survivors and colonizers: Contrasting biogeographic histories reconciled in the Antarctic freshwater copepod Boeckella poppei |
title_full_unstemmed |
Survivors and colonizers: Contrasting biogeographic histories reconciled in the Antarctic freshwater copepod Boeckella poppei |
title_sort |
survivors and colonizers: contrasting biogeographic histories reconciled in the antarctic freshwater copepod boeckella poppei |
publisher |
Frontiers Media SA |
publishDate |
2022 |
url |
http://dx.doi.org/10.3389/fevo.2022.1012852 https://www.frontiersin.org/articles/10.3389/fevo.2022.1012852/full |
long_lat |
ENVELOPE(-56.999,-56.999,-63.404,-63.404) ENVELOPE(-45.500,-45.500,-60.583,-60.583) |
geographic |
Antarctic Antarctic Peninsula Boeckella South Orkney Islands South Shetland Islands The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula Boeckella South Orkney Islands South Shetland Islands The Antarctic |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica South Orkney Islands South Shetland Islands |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica South Orkney Islands South Shetland Islands |
op_source |
Frontiers in Ecology and Evolution volume 10 ISSN 2296-701X |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3389/fevo.2022.1012852 |
container_title |
Frontiers in Ecology and Evolution |
container_volume |
10 |
_version_ |
1802645119410634752 |