A colonial-nesting seabird shows limited heart rate responses to natural variation in threats of polar bears
Several predator–prey systems are in flux as an indirect result of climate change. In the Arctic, earlier sea-ice loss is driving polar bears (Ursus maritimus) onto land when many colonial nesting seabirds are breeding. The result is a higher threat of nest predation for birds with potential limited...
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ftpubmed:oai:pubmedcentral.nih.gov:10548096 2023-11-05T03:39:14+01:00 A colonial-nesting seabird shows limited heart rate responses to natural variation in threats of polar bears Geldart, Erica A. Love, Oliver P. Barnas, Andrew F. Harris, Christopher M. Gilchrist, H. Grant Semeniuk, Christina A. D. 2023-10-04 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10548096/ https://doi.org/10.1098/rsos.221108 en eng The Royal Society http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10548096/ http://dx.doi.org/10.1098/rsos.221108 © 2023 The Authors. https://creativecommons.org/licenses/by/4.0/Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, provided the original author and source are credited. R Soc Open Sci Ecology Conservation and Global Change Biology Text 2023 ftpubmed https://doi.org/10.1098/rsos.221108 2023-10-08T01:07:59Z Several predator–prey systems are in flux as an indirect result of climate change. In the Arctic, earlier sea-ice loss is driving polar bears (Ursus maritimus) onto land when many colonial nesting seabirds are breeding. The result is a higher threat of nest predation for birds with potential limited ability to respond. We quantified heart rate change in a large common eider (Somateria mollissima) breeding colony in the Canadian Arctic to explore their adaptive capacity to keep pace with the increasing risk of egg predation by polar bears. Eiders displayed on average higher heart rates from baseline when polar bears were within their field of view. Moreover, eiders were insensitive to variation in the distance bears were to their nests, but exhibited mild bradycardia (lowered heart rate) the longer the eider was exposed to the bear given the hen's visibility. Results indicate that a limited ability to assess the risks posed by polar bears may result in long-term fitness consequences for eiders from the increasing frequency in interactions with this predator. Text Arctic Climate change Common Eider Sea ice Somateria mollissima Ursus maritimus PubMed Central (PMC) Royal Society Open Science 10 10 |
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English |
topic |
Ecology Conservation and Global Change Biology |
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Ecology Conservation and Global Change Biology Geldart, Erica A. Love, Oliver P. Barnas, Andrew F. Harris, Christopher M. Gilchrist, H. Grant Semeniuk, Christina A. D. A colonial-nesting seabird shows limited heart rate responses to natural variation in threats of polar bears |
topic_facet |
Ecology Conservation and Global Change Biology |
description |
Several predator–prey systems are in flux as an indirect result of climate change. In the Arctic, earlier sea-ice loss is driving polar bears (Ursus maritimus) onto land when many colonial nesting seabirds are breeding. The result is a higher threat of nest predation for birds with potential limited ability to respond. We quantified heart rate change in a large common eider (Somateria mollissima) breeding colony in the Canadian Arctic to explore their adaptive capacity to keep pace with the increasing risk of egg predation by polar bears. Eiders displayed on average higher heart rates from baseline when polar bears were within their field of view. Moreover, eiders were insensitive to variation in the distance bears were to their nests, but exhibited mild bradycardia (lowered heart rate) the longer the eider was exposed to the bear given the hen's visibility. Results indicate that a limited ability to assess the risks posed by polar bears may result in long-term fitness consequences for eiders from the increasing frequency in interactions with this predator. |
format |
Text |
author |
Geldart, Erica A. Love, Oliver P. Barnas, Andrew F. Harris, Christopher M. Gilchrist, H. Grant Semeniuk, Christina A. D. |
author_facet |
Geldart, Erica A. Love, Oliver P. Barnas, Andrew F. Harris, Christopher M. Gilchrist, H. Grant Semeniuk, Christina A. D. |
author_sort |
Geldart, Erica A. |
title |
A colonial-nesting seabird shows limited heart rate responses to natural variation in threats of polar bears |
title_short |
A colonial-nesting seabird shows limited heart rate responses to natural variation in threats of polar bears |
title_full |
A colonial-nesting seabird shows limited heart rate responses to natural variation in threats of polar bears |
title_fullStr |
A colonial-nesting seabird shows limited heart rate responses to natural variation in threats of polar bears |
title_full_unstemmed |
A colonial-nesting seabird shows limited heart rate responses to natural variation in threats of polar bears |
title_sort |
colonial-nesting seabird shows limited heart rate responses to natural variation in threats of polar bears |
publisher |
The Royal Society |
publishDate |
2023 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10548096/ https://doi.org/10.1098/rsos.221108 |
genre |
Arctic Climate change Common Eider Sea ice Somateria mollissima Ursus maritimus |
genre_facet |
Arctic Climate change Common Eider Sea ice Somateria mollissima Ursus maritimus |
op_source |
R Soc Open Sci |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10548096/ http://dx.doi.org/10.1098/rsos.221108 |
op_rights |
© 2023 The Authors. https://creativecommons.org/licenses/by/4.0/Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, provided the original author and source are credited. |
op_doi |
https://doi.org/10.1098/rsos.221108 |
container_title |
Royal Society Open Science |
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10 |
container_issue |
10 |
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1781695048068366336 |