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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Published in:Frontiers in Ecology and Evolution
Main Authors: Claudia S. Maturana, Elisabeth M. Biersma, Angie Díaz, Claudio González-Wevar, Tamara Contador, Peter Convey, Jennifer A. Jackson, Elie Poulin
Format: Article in Journal/Newspaper
Language:English
Published: Frontiers Media S.A. 2022
Subjects:
Online Access:https://doi.org/10.3389/fevo.2022.1012852
https://doaj.org/article/61c12f7b46d44003bb5b6a0b3372c120
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spelling ftdoajarticles:oai:doaj.org/article:61c12f7b46d44003bb5b6a0b3372c120 2023-05-15T13:44:08+02:00 Survivors and colonizers: Contrasting biogeographic histories reconciled in the Antarctic freshwater copepod Boeckella poppei Claudia S. Maturana Elisabeth M. Biersma Angie Díaz Claudio González-Wevar Tamara Contador Peter Convey Jennifer A. Jackson Elie Poulin 2022-12-01T00:00:00Z https://doi.org/10.3389/fevo.2022.1012852 https://doaj.org/article/61c12f7b46d44003bb5b6a0b3372c120 EN eng Frontiers Media S.A. https://www.frontiersin.org/articles/10.3389/fevo.2022.1012852/full https://doaj.org/toc/2296-701X 2296-701X doi:10.3389/fevo.2022.1012852 https://doaj.org/article/61c12f7b46d44003bb5b6a0b3372c120 Frontiers in Ecology and Evolution, Vol 10 (2022) Antarctic-Magellan connection centropagidae last glacial maximum monopolization hypothesis phylogeography refugia Evolution QH359-425 Ecology QH540-549.5 article 2022 ftdoajarticles https://doi.org/10.3389/fevo.2022.1012852 2022-12-30T20:15:38Z 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 Directory of Open Access Journals: DOAJ Articles Antarctic The Antarctic Antarctic Peninsula South Shetland Islands South Orkney Islands ENVELOPE(-45.500,-45.500,-60.583,-60.583) Boeckella ENVELOPE(-56.999,-56.999,-63.404,-63.404) Frontiers in Ecology and Evolution 10
institution Open Polar
collection Directory of Open Access Journals: DOAJ Articles
op_collection_id ftdoajarticles
language English
topic Antarctic-Magellan connection
centropagidae
last glacial maximum
monopolization hypothesis
phylogeography
refugia
Evolution
QH359-425
Ecology
QH540-549.5
spellingShingle Antarctic-Magellan connection
centropagidae
last glacial maximum
monopolization hypothesis
phylogeography
refugia
Evolution
QH359-425
Ecology
QH540-549.5
Claudia S. Maturana
Elisabeth M. Biersma
Angie Díaz
Claudio González-Wevar
Tamara Contador
Peter Convey
Jennifer A. Jackson
Elie Poulin
Survivors and colonizers: Contrasting biogeographic histories reconciled in the Antarctic freshwater copepod Boeckella poppei
topic_facet Antarctic-Magellan connection
centropagidae
last glacial maximum
monopolization hypothesis
phylogeography
refugia
Evolution
QH359-425
Ecology
QH540-549.5
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 Claudia S. Maturana
Elisabeth M. Biersma
Angie Díaz
Claudio González-Wevar
Tamara Contador
Peter Convey
Jennifer A. Jackson
Elie Poulin
author_facet Claudia S. Maturana
Elisabeth M. Biersma
Angie Díaz
Claudio González-Wevar
Tamara Contador
Peter Convey
Jennifer A. Jackson
Elie Poulin
author_sort Claudia S. Maturana
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 S.A.
publishDate 2022
url https://doi.org/10.3389/fevo.2022.1012852
https://doaj.org/article/61c12f7b46d44003bb5b6a0b3372c120
long_lat ENVELOPE(-45.500,-45.500,-60.583,-60.583)
ENVELOPE(-56.999,-56.999,-63.404,-63.404)
geographic Antarctic
The Antarctic
Antarctic Peninsula
South Shetland Islands
South Orkney Islands
Boeckella
geographic_facet Antarctic
The Antarctic
Antarctic Peninsula
South Shetland Islands
South Orkney Islands
Boeckella
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, Vol 10 (2022)
op_relation https://www.frontiersin.org/articles/10.3389/fevo.2022.1012852/full
https://doaj.org/toc/2296-701X
2296-701X
doi:10.3389/fevo.2022.1012852
https://doaj.org/article/61c12f7b46d44003bb5b6a0b3372c120
op_doi https://doi.org/10.3389/fevo.2022.1012852
container_title Frontiers in Ecology and Evolution
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