Genetic data support independent glacial refugia and open ocean barriers to dispersal for the Southern Ocean sea spider Austropallene cornigera (Möbius, 1902)
The diversity and distribution of Antarctic life has been strongly influenced by climatic events, in particular by large scale extension of ice sheets onto the continental shelf during repeated glacial cycles. It has been suggested that populations of benthic marine biota in the Antarctic were limit...
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ftnerc:oai:nora.nerc.ac.uk:508616 2023-05-15T13:48:08+02:00 Genetic data support independent glacial refugia and open ocean barriers to dispersal for the Southern Ocean sea spider Austropallene cornigera (Möbius, 1902) Doemel, Jana Sophie Convey, Peter Leese, Florian 2015-06 text http://nora.nerc.ac.uk/id/eprint/508616/ https://nora.nerc.ac.uk/id/eprint/508616/1/Genetic%20data%20support%20independent%20glacial%20refugia%20AAM.doc en eng https://nora.nerc.ac.uk/id/eprint/508616/1/Genetic%20data%20support%20independent%20glacial%20refugia%20AAM.doc Doemel, Jana Sophie; Convey, Peter orcid:0000-0001-8497-9903 Leese, Florian. 2015 Genetic data support independent glacial refugia and open ocean barriers to dispersal for the Southern Ocean sea spider Austropallene cornigera (Möbius, 1902). Journal of Crustacean Biology, 35 (4). 480-490. https://doi.org/10.1163/1937240X-00002351 <https://doi.org/10.1163/1937240X-00002351> Publication - Article PeerReviewed 2015 ftnerc https://doi.org/10.1163/1937240X-00002351 2023-02-04T19:40:24Z The diversity and distribution of Antarctic life has been strongly influenced by climatic events, in particular by large scale extension of ice sheets onto the continental shelf during repeated glacial cycles. It has been suggested that populations of benthic marine biota in the Antarctic were limited to very few refugia because the Antarctic shelf was covered with ice. Using the broadly-distributed pycnogonid Austropallene cornigeraas a model, in this study we tested different hypotheses for possible locations of glacial refugia ( ex situon the peri-Antarctic islands or in situon the Antarctic shelf). We sampled 64 individuals of A. cornigerafrom peri-Antarctic islands, the Weddell Sea and East Antarctica. The phylogeographic structure was analysed using partial sequences of the nuclear ribolomal genes 18S and 28S and the mitochondrial cytochrome coxidase subunit I gene (COI). The 18S and 28S sequences were highly conserved. Sequences of the COI were variable and revealed highest haplotype diversity for populations on the Antarctic shelf and lowest for the population from the remote island of Bouvetøya. In addition, the data showed clear genetic distances between the island and shelf populations. Our data are consistent with the hypothesis of survival in situ. The results also suggest that gene flow within A. cornigerais limited, hinting at possible speciation processes acting independently on the Antarctic continental shelf and the peri-Antarctic islands. Article in Journal/Newspaper Antarc* Antarctic Antarctica Bouvetøya East Antarctica Southern Ocean Weddell Sea Natural Environment Research Council: NERC Open Research Archive Antarctic Southern Ocean The Antarctic Weddell Sea East Antarctica Weddell Bouvetøya ENVELOPE(3.358,3.358,-54.422,-54.422) Möbius ENVELOPE(164.217,164.217,-74.633,-74.633) Journal of Crustacean Biology 35 4 480 490 |
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Open Polar |
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Natural Environment Research Council: NERC Open Research Archive |
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ftnerc |
language |
English |
description |
The diversity and distribution of Antarctic life has been strongly influenced by climatic events, in particular by large scale extension of ice sheets onto the continental shelf during repeated glacial cycles. It has been suggested that populations of benthic marine biota in the Antarctic were limited to very few refugia because the Antarctic shelf was covered with ice. Using the broadly-distributed pycnogonid Austropallene cornigeraas a model, in this study we tested different hypotheses for possible locations of glacial refugia ( ex situon the peri-Antarctic islands or in situon the Antarctic shelf). We sampled 64 individuals of A. cornigerafrom peri-Antarctic islands, the Weddell Sea and East Antarctica. The phylogeographic structure was analysed using partial sequences of the nuclear ribolomal genes 18S and 28S and the mitochondrial cytochrome coxidase subunit I gene (COI). The 18S and 28S sequences were highly conserved. Sequences of the COI were variable and revealed highest haplotype diversity for populations on the Antarctic shelf and lowest for the population from the remote island of Bouvetøya. In addition, the data showed clear genetic distances between the island and shelf populations. Our data are consistent with the hypothesis of survival in situ. The results also suggest that gene flow within A. cornigerais limited, hinting at possible speciation processes acting independently on the Antarctic continental shelf and the peri-Antarctic islands. |
format |
Article in Journal/Newspaper |
author |
Doemel, Jana Sophie Convey, Peter Leese, Florian |
spellingShingle |
Doemel, Jana Sophie Convey, Peter Leese, Florian Genetic data support independent glacial refugia and open ocean barriers to dispersal for the Southern Ocean sea spider Austropallene cornigera (Möbius, 1902) |
author_facet |
Doemel, Jana Sophie Convey, Peter Leese, Florian |
author_sort |
Doemel, Jana Sophie |
title |
Genetic data support independent glacial refugia and open ocean barriers to dispersal for the Southern Ocean sea spider Austropallene cornigera (Möbius, 1902) |
title_short |
Genetic data support independent glacial refugia and open ocean barriers to dispersal for the Southern Ocean sea spider Austropallene cornigera (Möbius, 1902) |
title_full |
Genetic data support independent glacial refugia and open ocean barriers to dispersal for the Southern Ocean sea spider Austropallene cornigera (Möbius, 1902) |
title_fullStr |
Genetic data support independent glacial refugia and open ocean barriers to dispersal for the Southern Ocean sea spider Austropallene cornigera (Möbius, 1902) |
title_full_unstemmed |
Genetic data support independent glacial refugia and open ocean barriers to dispersal for the Southern Ocean sea spider Austropallene cornigera (Möbius, 1902) |
title_sort |
genetic data support independent glacial refugia and open ocean barriers to dispersal for the southern ocean sea spider austropallene cornigera (möbius, 1902) |
publishDate |
2015 |
url |
http://nora.nerc.ac.uk/id/eprint/508616/ https://nora.nerc.ac.uk/id/eprint/508616/1/Genetic%20data%20support%20independent%20glacial%20refugia%20AAM.doc |
long_lat |
ENVELOPE(3.358,3.358,-54.422,-54.422) ENVELOPE(164.217,164.217,-74.633,-74.633) |
geographic |
Antarctic Southern Ocean The Antarctic Weddell Sea East Antarctica Weddell Bouvetøya Möbius |
geographic_facet |
Antarctic Southern Ocean The Antarctic Weddell Sea East Antarctica Weddell Bouvetøya Möbius |
genre |
Antarc* Antarctic Antarctica Bouvetøya East Antarctica Southern Ocean Weddell Sea |
genre_facet |
Antarc* Antarctic Antarctica Bouvetøya East Antarctica Southern Ocean Weddell Sea |
op_relation |
https://nora.nerc.ac.uk/id/eprint/508616/1/Genetic%20data%20support%20independent%20glacial%20refugia%20AAM.doc Doemel, Jana Sophie; Convey, Peter orcid:0000-0001-8497-9903 Leese, Florian. 2015 Genetic data support independent glacial refugia and open ocean barriers to dispersal for the Southern Ocean sea spider Austropallene cornigera (Möbius, 1902). Journal of Crustacean Biology, 35 (4). 480-490. https://doi.org/10.1163/1937240X-00002351 <https://doi.org/10.1163/1937240X-00002351> |
op_doi |
https://doi.org/10.1163/1937240X-00002351 |
container_title |
Journal of Crustacean Biology |
container_volume |
35 |
container_issue |
4 |
container_start_page |
480 |
op_container_end_page |
490 |
_version_ |
1766248780197265408 |