Data from: Implications of the circumpolar genetic structure of polar bears for their conservation in a rapidly warming Arctic
We provide an expansive analysis of polar bear (Ursus maritimus) circumpolar genetic variation during the last two decades of decline in their sea-ice habitat. We sought to evaluate whether their genetic diversity and structure have changed over this period of habitat decline, how their current gene...
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Format: | Article in Journal/Newspaper |
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2015
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Online Access: | http://hdl.handle.net/10255/dryad.71925 https://doi.org/10.5061/dryad.v2j1r |
id |
ftdryad:oai:v1.datadryad.org:10255/dryad.71925 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
Dryad Digital Repository (Duke University) |
op_collection_id |
ftdryad |
language |
unknown |
topic |
Arctic polar bear population genetics mitochondrial DNA hybridization phylogeography phylogenetics climate change conservation |
spellingShingle |
Arctic polar bear population genetics mitochondrial DNA hybridization phylogeography phylogenetics climate change conservation Peacock, Elizabeth Sonsthagen, Sarah A. Obbard, Martyn E. Boltunov, Andrei Regehr, Eric V. Ovsyanikov, Nikita Aars, Jon Atkinson, Stephen N. Sage, George K. Hope, Andrew G. Zeyl, Eve Bachmann, Lutz Ehrich, Dorothee Scribner, Kim T. Amstrup, Steven C. Belikov, Stanislav Born, Erik W. Derocher, Andrew E. Stirling, Ian Taylor, Mitchell K. Wiig, Øystein Paetkau, David Talbot, Sandra L. Data from: Implications of the circumpolar genetic structure of polar bears for their conservation in a rapidly warming Arctic |
topic_facet |
Arctic polar bear population genetics mitochondrial DNA hybridization phylogeography phylogenetics climate change conservation |
description |
We provide an expansive analysis of polar bear (Ursus maritimus) circumpolar genetic variation during the last two decades of decline in their sea-ice habitat. We sought to evaluate whether their genetic diversity and structure have changed over this period of habitat decline, how their current genetic patterns compare with past patterns, and how genetic demography changed with ancient fluctuations in climate. Characterizing their circumpolar genetic structure using microsatellite data, we defined four clusters that largely correspond to current ecological and oceanographic factors: Eastern Polar Basin, Western Polar Basin, Canadian Archipelago and Southern Canada. We document evidence for recent (ca. last 1–3 generations) directional gene flow from Southern Canada and the Eastern Polar Basin towards the Canadian Archipelago, an area hypothesized to be a future refugium for polar bears as climate-induced habitat decline continues. Our data provide empirical evidence in support of this hypothesis. The direction of current gene flow differs from earlier patterns of gene flow in the Holocene. From analyses of mitochondrial DNA, the Canadian Archipelago cluster and the Barents Sea subpopulation within the Eastern Polar Basin cluster did not show signals of population expansion, suggesting these areas may have served also as past interglacial refugia. Mismatch analyses of mitochondrial DNA data from polar and the paraphyletic brown bear (U. arctos) uncovered offset signals in timing of population expansion between the two species, that are attributed to differential demographic responses to past climate cycling. Mitogenomic structure of polar bears was shallow and developed recently, in contrast to the multiple clades of brown bears. We found no genetic signatures of recent hybridization between the species in our large, circumpolar sample, suggesting that recently observed hybrids represent localized events. Documenting changes in subpopulation connectivity will allow polar nations to proactively adjust conservation actions to continuing decline in sea-ice habitat. |
format |
Article in Journal/Newspaper |
author |
Peacock, Elizabeth Sonsthagen, Sarah A. Obbard, Martyn E. Boltunov, Andrei Regehr, Eric V. Ovsyanikov, Nikita Aars, Jon Atkinson, Stephen N. Sage, George K. Hope, Andrew G. Zeyl, Eve Bachmann, Lutz Ehrich, Dorothee Scribner, Kim T. Amstrup, Steven C. Belikov, Stanislav Born, Erik W. Derocher, Andrew E. Stirling, Ian Taylor, Mitchell K. Wiig, Øystein Paetkau, David Talbot, Sandra L. |
author_facet |
Peacock, Elizabeth Sonsthagen, Sarah A. Obbard, Martyn E. Boltunov, Andrei Regehr, Eric V. Ovsyanikov, Nikita Aars, Jon Atkinson, Stephen N. Sage, George K. Hope, Andrew G. Zeyl, Eve Bachmann, Lutz Ehrich, Dorothee Scribner, Kim T. Amstrup, Steven C. Belikov, Stanislav Born, Erik W. Derocher, Andrew E. Stirling, Ian Taylor, Mitchell K. Wiig, Øystein Paetkau, David Talbot, Sandra L. |
author_sort |
Peacock, Elizabeth |
title |
Data from: Implications of the circumpolar genetic structure of polar bears for their conservation in a rapidly warming Arctic |
title_short |
Data from: Implications of the circumpolar genetic structure of polar bears for their conservation in a rapidly warming Arctic |
title_full |
Data from: Implications of the circumpolar genetic structure of polar bears for their conservation in a rapidly warming Arctic |
title_fullStr |
Data from: Implications of the circumpolar genetic structure of polar bears for their conservation in a rapidly warming Arctic |
title_full_unstemmed |
Data from: Implications of the circumpolar genetic structure of polar bears for their conservation in a rapidly warming Arctic |
title_sort |
data from: implications of the circumpolar genetic structure of polar bears for their conservation in a rapidly warming arctic |
publishDate |
2015 |
url |
http://hdl.handle.net/10255/dryad.71925 https://doi.org/10.5061/dryad.v2j1r |
op_coverage |
Barents Sea Western Hudson Bay Southern Hudson Bay Davis Strait Kara Sea Laptev Sea Southern Beaufort Sea Northern Beaufort Sea Foxe Basin Baffin Bay Norwegian Bay M'Clintock Channel Gulf of Boothia Viscount Melville Chukchi Sea Kane Basin Lancaster Sound East Greenland Holocene Pleistocene |
long_lat |
ENVELOPE(-77.918,-77.918,65.931,65.931) ENVELOPE(-90.657,-90.657,70.719,70.719) ENVELOPE(-63.038,-63.038,-73.952,-73.952) ENVELOPE(-83.999,-83.999,74.218,74.218) ENVELOPE(-94.214,-94.214,57.802,57.802) ENVELOPE(-102.002,-102.002,72.001,72.001) ENVELOPE(-91.535,-91.535,77.584,77.584) |
geographic |
Arctic Baffin Bay Barents Sea Canada Chukchi Sea Foxe Basin Greenland Gulf of Boothia Hudson Hudson Bay Kane Kara Sea Lancaster Sound Laptev Sea M'Clintock M'Clintock Channel Norwegian Bay |
geographic_facet |
Arctic Baffin Bay Barents Sea Canada Chukchi Sea Foxe Basin Greenland Gulf of Boothia Hudson Hudson Bay Kane Kara Sea Lancaster Sound Laptev Sea M'Clintock M'Clintock Channel Norwegian Bay |
genre |
Arctic Arctic Baffin Bay Baffin Bay Baffin Barents Sea Beaufort Sea brown bear Canadian Archipelago Chukchi Chukchi Sea Climate change Davis Strait East Greenland Foxe Basin Greenland Hudson Bay Kane Basin Kara Sea Lancaster Sound laptev Laptev Sea Norwegian Bay Norwegian Bay Sea ice Ursus maritimus |
genre_facet |
Arctic Arctic Baffin Bay Baffin Bay Baffin Barents Sea Beaufort Sea brown bear Canadian Archipelago Chukchi Chukchi Sea Climate change Davis Strait East Greenland Foxe Basin Greenland Hudson Bay Kane Basin Kara Sea Lancaster Sound laptev Laptev Sea Norwegian Bay Norwegian Bay Sea ice Ursus maritimus |
op_relation |
doi:10.5061/dryad.v2j1r/1 doi:10.1371/journal.pone.0112021 PMID:25562525 doi:10.5061/dryad.v2j1r Peacock E, Sonsthagen SA, Obbard ME, Boltunov A, Regehr EV, Ovsyanikov N, Aars J, Atkinson SN, Sage GK, Hope AG, Zeyl E, Bachmann L, Ehrich D, Scribner KT, Amstrup SC, Belikov S, Born EW, Derocher AE, Stirling I, Taylor MK, Wiig Ø, Paetkau D, Talbot SL (2015) Implications of the circumpolar genetic structure of polar bears for their conservation in a rapidly warming Arctic. PLOS ONE 10(1): e112021. http://hdl.handle.net/10255/dryad.71925 |
op_doi |
https://doi.org/10.5061/dryad.v2j1r https://doi.org/10.5061/dryad.v2j1r/1 https://doi.org/10.1371/journal.pone.0112021 |
_version_ |
1766301519484813312 |
spelling |
ftdryad:oai:v1.datadryad.org:10255/dryad.71925 2023-05-15T14:27:40+02:00 Data from: Implications of the circumpolar genetic structure of polar bears for their conservation in a rapidly warming Arctic Peacock, Elizabeth Sonsthagen, Sarah A. Obbard, Martyn E. Boltunov, Andrei Regehr, Eric V. Ovsyanikov, Nikita Aars, Jon Atkinson, Stephen N. Sage, George K. Hope, Andrew G. Zeyl, Eve Bachmann, Lutz Ehrich, Dorothee Scribner, Kim T. Amstrup, Steven C. Belikov, Stanislav Born, Erik W. Derocher, Andrew E. Stirling, Ian Taylor, Mitchell K. Wiig, Øystein Paetkau, David Talbot, Sandra L. Barents Sea Western Hudson Bay Southern Hudson Bay Davis Strait Kara Sea Laptev Sea Southern Beaufort Sea Northern Beaufort Sea Foxe Basin Baffin Bay Norwegian Bay M'Clintock Channel Gulf of Boothia Viscount Melville Chukchi Sea Kane Basin Lancaster Sound East Greenland Holocene Pleistocene 2015-02-03T16:32:19Z http://hdl.handle.net/10255/dryad.71925 https://doi.org/10.5061/dryad.v2j1r unknown doi:10.5061/dryad.v2j1r/1 doi:10.1371/journal.pone.0112021 PMID:25562525 doi:10.5061/dryad.v2j1r Peacock E, Sonsthagen SA, Obbard ME, Boltunov A, Regehr EV, Ovsyanikov N, Aars J, Atkinson SN, Sage GK, Hope AG, Zeyl E, Bachmann L, Ehrich D, Scribner KT, Amstrup SC, Belikov S, Born EW, Derocher AE, Stirling I, Taylor MK, Wiig Ø, Paetkau D, Talbot SL (2015) Implications of the circumpolar genetic structure of polar bears for their conservation in a rapidly warming Arctic. PLOS ONE 10(1): e112021. http://hdl.handle.net/10255/dryad.71925 Arctic polar bear population genetics mitochondrial DNA hybridization phylogeography phylogenetics climate change conservation Article 2015 ftdryad https://doi.org/10.5061/dryad.v2j1r https://doi.org/10.5061/dryad.v2j1r/1 https://doi.org/10.1371/journal.pone.0112021 2020-01-01T15:12:19Z We provide an expansive analysis of polar bear (Ursus maritimus) circumpolar genetic variation during the last two decades of decline in their sea-ice habitat. We sought to evaluate whether their genetic diversity and structure have changed over this period of habitat decline, how their current genetic patterns compare with past patterns, and how genetic demography changed with ancient fluctuations in climate. Characterizing their circumpolar genetic structure using microsatellite data, we defined four clusters that largely correspond to current ecological and oceanographic factors: Eastern Polar Basin, Western Polar Basin, Canadian Archipelago and Southern Canada. We document evidence for recent (ca. last 1–3 generations) directional gene flow from Southern Canada and the Eastern Polar Basin towards the Canadian Archipelago, an area hypothesized to be a future refugium for polar bears as climate-induced habitat decline continues. Our data provide empirical evidence in support of this hypothesis. The direction of current gene flow differs from earlier patterns of gene flow in the Holocene. From analyses of mitochondrial DNA, the Canadian Archipelago cluster and the Barents Sea subpopulation within the Eastern Polar Basin cluster did not show signals of population expansion, suggesting these areas may have served also as past interglacial refugia. Mismatch analyses of mitochondrial DNA data from polar and the paraphyletic brown bear (U. arctos) uncovered offset signals in timing of population expansion between the two species, that are attributed to differential demographic responses to past climate cycling. Mitogenomic structure of polar bears was shallow and developed recently, in contrast to the multiple clades of brown bears. We found no genetic signatures of recent hybridization between the species in our large, circumpolar sample, suggesting that recently observed hybrids represent localized events. Documenting changes in subpopulation connectivity will allow polar nations to proactively adjust conservation actions to continuing decline in sea-ice habitat. Article in Journal/Newspaper Arctic Arctic Baffin Bay Baffin Bay Baffin Barents Sea Beaufort Sea brown bear Canadian Archipelago Chukchi Chukchi Sea Climate change Davis Strait East Greenland Foxe Basin Greenland Hudson Bay Kane Basin Kara Sea Lancaster Sound laptev Laptev Sea Norwegian Bay Norwegian Bay Sea ice Ursus maritimus Dryad Digital Repository (Duke University) Arctic Baffin Bay Barents Sea Canada Chukchi Sea Foxe Basin ENVELOPE(-77.918,-77.918,65.931,65.931) Greenland Gulf of Boothia ENVELOPE(-90.657,-90.657,70.719,70.719) Hudson Hudson Bay Kane ENVELOPE(-63.038,-63.038,-73.952,-73.952) Kara Sea Lancaster Sound ENVELOPE(-83.999,-83.999,74.218,74.218) Laptev Sea M'Clintock ENVELOPE(-94.214,-94.214,57.802,57.802) M'Clintock Channel ENVELOPE(-102.002,-102.002,72.001,72.001) Norwegian Bay ENVELOPE(-91.535,-91.535,77.584,77.584) |