50,000 years of ice and seals: Impacts of the Last Glacial Maximum on Antarctic fur seals
Ice is one of the most important drivers of population dynamics in polar organisms, influencing the locations, sizes, and connectivity of populations. Antarctic fur seals, Arctocephalus gazella, are particularly interesting in this regard, as they are concomitantly reliant on both ice-associated pre...
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Online Access: | http://nora.nerc.ac.uk/id/eprint/531044/ https://nora.nerc.ac.uk/id/eprint/531044/1/ece3.8104.pdf https://onlinelibrary.wiley.com/doi/10.1002/ece3.8104 |
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ftnerc:oai:nora.nerc.ac.uk:531044 2023-05-15T13:41:46+02:00 50,000 years of ice and seals: Impacts of the Last Glacial Maximum on Antarctic fur seals Cleary, Alison C. Hoffman, Joseph I. Forcada, Jaume Lydersen, Christian Lowther, Andrew D. Kovacs, Kit M. 2021-10-19 text http://nora.nerc.ac.uk/id/eprint/531044/ https://nora.nerc.ac.uk/id/eprint/531044/1/ece3.8104.pdf https://onlinelibrary.wiley.com/doi/10.1002/ece3.8104 en eng Wiley https://nora.nerc.ac.uk/id/eprint/531044/1/ece3.8104.pdf Cleary, Alison C. orcid:0000-0001-9880-5816 Hoffman, Joseph I.; Forcada, Jaume orcid:0000-0002-2115-0150 Lydersen, Christian; Lowther, Andrew D.; Kovacs, Kit M. 2021 50,000 years of ice and seals: Impacts of the Last Glacial Maximum on Antarctic fur seals. Ecology and Evolution, 11 (20). 14003-14011. https://doi.org/10.1002/ece3.8104 <https://doi.org/10.1002/ece3.8104> cc_by_4 CC-BY Publication - Article PeerReviewed 2021 ftnerc https://doi.org/10.1002/ece3.8104 2023-02-04T19:52:32Z Ice is one of the most important drivers of population dynamics in polar organisms, influencing the locations, sizes, and connectivity of populations. Antarctic fur seals, Arctocephalus gazella, are particularly interesting in this regard, as they are concomitantly reliant on both ice-associated prey and ice-free coastal breeding areas. We reconstructed the history of this species through the Last Glacial Maximum (LGM) using genomic sequence data from seals across their range. Population size trends and divergence events were investigated using continuous-time size estimation analysis and divergence time estimation models. The combined results indicated that a panmictic population present prior to the LGM split into two small refugial populations during peak ice extent. Following ice decline, the western refugial population founded colonies at the South Shetlands, South Georgia, and Bouvetøya, while the eastern refugial population founded the colony on Iles Kerguelen. Postglacial population divergence times closely match geological estimates of when these coastal breeding areas became ice free. Given the predictions regarding continued future warming in polar oceans, these responses of Antarctic fur seals to past climate variation suggest it may be worthwhile giving conservation consideration to potential future breeding locations, such as areas further south along the Antarctic Peninsula, in addition to present colony areas. Article in Journal/Newspaper Antarc* Antarctic Antarctic Fur Seals Antarctic Peninsula Arctocephalus gazella Bouvetøya Natural Environment Research Council: NERC Open Research Archive Antarctic The Antarctic Antarctic Peninsula Kerguelen Bouvetøya ENVELOPE(3.358,3.358,-54.422,-54.422) Ecology and Evolution 11 20 14003 14011 |
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Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
description |
Ice is one of the most important drivers of population dynamics in polar organisms, influencing the locations, sizes, and connectivity of populations. Antarctic fur seals, Arctocephalus gazella, are particularly interesting in this regard, as they are concomitantly reliant on both ice-associated prey and ice-free coastal breeding areas. We reconstructed the history of this species through the Last Glacial Maximum (LGM) using genomic sequence data from seals across their range. Population size trends and divergence events were investigated using continuous-time size estimation analysis and divergence time estimation models. The combined results indicated that a panmictic population present prior to the LGM split into two small refugial populations during peak ice extent. Following ice decline, the western refugial population founded colonies at the South Shetlands, South Georgia, and Bouvetøya, while the eastern refugial population founded the colony on Iles Kerguelen. Postglacial population divergence times closely match geological estimates of when these coastal breeding areas became ice free. Given the predictions regarding continued future warming in polar oceans, these responses of Antarctic fur seals to past climate variation suggest it may be worthwhile giving conservation consideration to potential future breeding locations, such as areas further south along the Antarctic Peninsula, in addition to present colony areas. |
format |
Article in Journal/Newspaper |
author |
Cleary, Alison C. Hoffman, Joseph I. Forcada, Jaume Lydersen, Christian Lowther, Andrew D. Kovacs, Kit M. |
spellingShingle |
Cleary, Alison C. Hoffman, Joseph I. Forcada, Jaume Lydersen, Christian Lowther, Andrew D. Kovacs, Kit M. 50,000 years of ice and seals: Impacts of the Last Glacial Maximum on Antarctic fur seals |
author_facet |
Cleary, Alison C. Hoffman, Joseph I. Forcada, Jaume Lydersen, Christian Lowther, Andrew D. Kovacs, Kit M. |
author_sort |
Cleary, Alison C. |
title |
50,000 years of ice and seals: Impacts of the Last Glacial Maximum on Antarctic fur seals |
title_short |
50,000 years of ice and seals: Impacts of the Last Glacial Maximum on Antarctic fur seals |
title_full |
50,000 years of ice and seals: Impacts of the Last Glacial Maximum on Antarctic fur seals |
title_fullStr |
50,000 years of ice and seals: Impacts of the Last Glacial Maximum on Antarctic fur seals |
title_full_unstemmed |
50,000 years of ice and seals: Impacts of the Last Glacial Maximum on Antarctic fur seals |
title_sort |
50,000 years of ice and seals: impacts of the last glacial maximum on antarctic fur seals |
publisher |
Wiley |
publishDate |
2021 |
url |
http://nora.nerc.ac.uk/id/eprint/531044/ https://nora.nerc.ac.uk/id/eprint/531044/1/ece3.8104.pdf https://onlinelibrary.wiley.com/doi/10.1002/ece3.8104 |
long_lat |
ENVELOPE(3.358,3.358,-54.422,-54.422) |
geographic |
Antarctic The Antarctic Antarctic Peninsula Kerguelen Bouvetøya |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula Kerguelen Bouvetøya |
genre |
Antarc* Antarctic Antarctic Fur Seals Antarctic Peninsula Arctocephalus gazella Bouvetøya |
genre_facet |
Antarc* Antarctic Antarctic Fur Seals Antarctic Peninsula Arctocephalus gazella Bouvetøya |
op_relation |
https://nora.nerc.ac.uk/id/eprint/531044/1/ece3.8104.pdf Cleary, Alison C. orcid:0000-0001-9880-5816 Hoffman, Joseph I.; Forcada, Jaume orcid:0000-0002-2115-0150 Lydersen, Christian; Lowther, Andrew D.; Kovacs, Kit M. 2021 50,000 years of ice and seals: Impacts of the Last Glacial Maximum on Antarctic fur seals. Ecology and Evolution, 11 (20). 14003-14011. https://doi.org/10.1002/ece3.8104 <https://doi.org/10.1002/ece3.8104> |
op_rights |
cc_by_4 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1002/ece3.8104 |
container_title |
Ecology and Evolution |
container_volume |
11 |
container_issue |
20 |
container_start_page |
14003 |
op_container_end_page |
14011 |
_version_ |
1766157588000407552 |