Data from: Range contraction and increasing isolation of a polar bear subpopulation in an era of sea-ice loss
Climate change is expected to result in range shifts and habitat fragmentation for many species. In the Arctic, loss of sea ice will reduce barriers to dispersal or eliminate movement corridors, resulting in increased connectivity or geographic isolation with sweeping implications for conservation....
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ftdans:oai:easy.dans.knaw.nl:easy-dataset:100278 2023-07-02T03:31:33+02:00 Data from: Range contraction and increasing isolation of a polar bear subpopulation in an era of sea-ice loss Laidre, Kristin L. Born, Erik W. Atkinson, Stephen N. Wiig, Øystein Andersen, Liselotte W. Lunn, Nicholas J. Dyck, Markus Regehr, Eric V. McGovern, Richard Heagerty, Patrick 2018-02-01T23:47:48.000+01:00 http://nbn-resolving.org/urn:nbn:nl:ui:13-z1-7epj https://easy.dans.knaw.nl/ui/datasets/id/easy-dataset:100278 unknown doi:10.5061/dryad.74v52/1 doi:10.1002/ece3.3809 http://nbn-resolving.org/urn:nbn:nl:ui:13-z1-7epj doi:10.5061/dryad.74v52 https://easy.dans.knaw.nl/ui/datasets/id/easy-dataset:100278 OPEN_ACCESS: The data are archived in Easy, they are accessible elsewhere through the DOI https://dans.knaw.nl/en/about/organisation-and-policy/legal-information/DANSLicence.pdf Life sciences medicine and health care 2018 ftdans https://doi.org/10.5061/dryad.74v52/110.1002/ece3.380910.5061/dryad.74v52 2023-06-13T13:26:17Z Climate change is expected to result in range shifts and habitat fragmentation for many species. In the Arctic, loss of sea ice will reduce barriers to dispersal or eliminate movement corridors, resulting in increased connectivity or geographic isolation with sweeping implications for conservation. We used satellite telemetry, data from individually marked animals (research and harvest), and microsatellite genetic data to examine changes in geographic range, emigration, and interpopulation connectivity of the Baffin Bay (BB) polar bear (Ursus maritimus) subpopulation over a 25-year period of sea-ice loss. Satellite telemetry collected from n = 43 (1991–1995) and 38 (2009–2015) adult females revealed a significant contraction in subpopulation range size (95% bivariate normal kernel range) in most months and seasons, with the most marked reduction being a 70% decline in summer from 716,000 km2 (SE 58,000) to 211,000 km2 (SE 23,000) (p < .001). Between the 1990s and 2000s, there was a significant shift northward during the on-ice seasons (2.6° shift in winter median latitude, 1.1° shift in spring median latitude) and a significant range contraction in the ice-free summers. Bears in the 2000s were less likely to leave BB, with significant reductions in the numbers of bears moving into Davis Strait (DS) in winter and Lancaster Sound (LS) in summer. Harvest recoveries suggested both short and long-term fidelity to BB remained high over both periods (83–99% of marked bears remained in BB). Genetic analyses using eight polymorphic microsatellites confirmed a previously documented differentiation between BB, DS, and LS; yet weakly differentiated BB from Kane Basin (KB) for the first time. Our results provide the first multiple lines of evidence for an increasingly geographically and functionally isolated subpopulation of polar bears in the context of long-term sea-ice loss. This may be indicative of future patterns for other polar bear subpopulations under climate change. Other/Unknown Material Arctic Baffin Bay Baffin Bay Baffin Climate change Davis Strait Kane Basin Lancaster Sound polar bear Sea ice Ursus maritimus Data Archiving and Networked Services (DANS): EASY (KNAW - Koninklijke Nederlandse Akademie van Wetenschappen) Arctic Baffin Bay Kane ENVELOPE(-63.038,-63.038,-73.952,-73.952) Lancaster Sound ENVELOPE(-83.999,-83.999,74.218,74.218) |
institution |
Open Polar |
collection |
Data Archiving and Networked Services (DANS): EASY (KNAW - Koninklijke Nederlandse Akademie van Wetenschappen) |
op_collection_id |
ftdans |
language |
unknown |
topic |
Life sciences medicine and health care |
spellingShingle |
Life sciences medicine and health care Laidre, Kristin L. Born, Erik W. Atkinson, Stephen N. Wiig, Øystein Andersen, Liselotte W. Lunn, Nicholas J. Dyck, Markus Regehr, Eric V. McGovern, Richard Heagerty, Patrick Data from: Range contraction and increasing isolation of a polar bear subpopulation in an era of sea-ice loss |
topic_facet |
Life sciences medicine and health care |
description |
Climate change is expected to result in range shifts and habitat fragmentation for many species. In the Arctic, loss of sea ice will reduce barriers to dispersal or eliminate movement corridors, resulting in increased connectivity or geographic isolation with sweeping implications for conservation. We used satellite telemetry, data from individually marked animals (research and harvest), and microsatellite genetic data to examine changes in geographic range, emigration, and interpopulation connectivity of the Baffin Bay (BB) polar bear (Ursus maritimus) subpopulation over a 25-year period of sea-ice loss. Satellite telemetry collected from n = 43 (1991–1995) and 38 (2009–2015) adult females revealed a significant contraction in subpopulation range size (95% bivariate normal kernel range) in most months and seasons, with the most marked reduction being a 70% decline in summer from 716,000 km2 (SE 58,000) to 211,000 km2 (SE 23,000) (p < .001). Between the 1990s and 2000s, there was a significant shift northward during the on-ice seasons (2.6° shift in winter median latitude, 1.1° shift in spring median latitude) and a significant range contraction in the ice-free summers. Bears in the 2000s were less likely to leave BB, with significant reductions in the numbers of bears moving into Davis Strait (DS) in winter and Lancaster Sound (LS) in summer. Harvest recoveries suggested both short and long-term fidelity to BB remained high over both periods (83–99% of marked bears remained in BB). Genetic analyses using eight polymorphic microsatellites confirmed a previously documented differentiation between BB, DS, and LS; yet weakly differentiated BB from Kane Basin (KB) for the first time. Our results provide the first multiple lines of evidence for an increasingly geographically and functionally isolated subpopulation of polar bears in the context of long-term sea-ice loss. This may be indicative of future patterns for other polar bear subpopulations under climate change. |
author |
Laidre, Kristin L. Born, Erik W. Atkinson, Stephen N. Wiig, Øystein Andersen, Liselotte W. Lunn, Nicholas J. Dyck, Markus Regehr, Eric V. McGovern, Richard Heagerty, Patrick |
author_facet |
Laidre, Kristin L. Born, Erik W. Atkinson, Stephen N. Wiig, Øystein Andersen, Liselotte W. Lunn, Nicholas J. Dyck, Markus Regehr, Eric V. McGovern, Richard Heagerty, Patrick |
author_sort |
Laidre, Kristin L. |
title |
Data from: Range contraction and increasing isolation of a polar bear subpopulation in an era of sea-ice loss |
title_short |
Data from: Range contraction and increasing isolation of a polar bear subpopulation in an era of sea-ice loss |
title_full |
Data from: Range contraction and increasing isolation of a polar bear subpopulation in an era of sea-ice loss |
title_fullStr |
Data from: Range contraction and increasing isolation of a polar bear subpopulation in an era of sea-ice loss |
title_full_unstemmed |
Data from: Range contraction and increasing isolation of a polar bear subpopulation in an era of sea-ice loss |
title_sort |
data from: range contraction and increasing isolation of a polar bear subpopulation in an era of sea-ice loss |
publishDate |
2018 |
url |
http://nbn-resolving.org/urn:nbn:nl:ui:13-z1-7epj https://easy.dans.knaw.nl/ui/datasets/id/easy-dataset:100278 |
long_lat |
ENVELOPE(-63.038,-63.038,-73.952,-73.952) ENVELOPE(-83.999,-83.999,74.218,74.218) |
geographic |
Arctic Baffin Bay Kane Lancaster Sound |
geographic_facet |
Arctic Baffin Bay Kane Lancaster Sound |
genre |
Arctic Baffin Bay Baffin Bay Baffin Climate change Davis Strait Kane Basin Lancaster Sound polar bear Sea ice Ursus maritimus |
genre_facet |
Arctic Baffin Bay Baffin Bay Baffin Climate change Davis Strait Kane Basin Lancaster Sound polar bear Sea ice Ursus maritimus |
op_relation |
doi:10.5061/dryad.74v52/1 doi:10.1002/ece3.3809 http://nbn-resolving.org/urn:nbn:nl:ui:13-z1-7epj doi:10.5061/dryad.74v52 https://easy.dans.knaw.nl/ui/datasets/id/easy-dataset:100278 |
op_rights |
OPEN_ACCESS: The data are archived in Easy, they are accessible elsewhere through the DOI https://dans.knaw.nl/en/about/organisation-and-policy/legal-information/DANSLicence.pdf |
op_doi |
https://doi.org/10.5061/dryad.74v52/110.1002/ece3.380910.5061/dryad.74v52 |
_version_ |
1770270928469491712 |