Comparison of feeding niches between Arctic and northward-moving sub-Arctic marine mammals in Greenland
The climate change-induced northward movement of sub-Arctic marine mammals increases their range overlap and interactions with native Arctic species. We compared feeding patterns of 11 marine mammal species (4 Arctic and 7 sub-Arctic) in Greenland using stable isotope ratios and fatty acid signature...
Published in: | Marine Ecology Progress Series |
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2024
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Online Access: | https://pure.au.dk/portal/en/publications/5b028c2f-5343-45f9-9d56-26949d3eeb3b https://doi.org/10.3354/meps14440 http://www.scopus.com/inward/record.url?scp=85185404943&partnerID=8YFLogxK |
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ftuniaarhuspubl:oai:pure.atira.dk:publications/5b028c2f-5343-45f9-9d56-26949d3eeb3b 2024-09-15T17:50:19+00:00 Comparison of feeding niches between Arctic and northward-moving sub-Arctic marine mammals in Greenland Land-Miller, Haley Roos, Anna M. Simon, Malene Dietz, Rune Sonne, Christian Pedro, Sara Rosing-Asvid, Aqqalu Rigét, Frank F. McKinney, Melissa A. 2024-02 https://pure.au.dk/portal/en/publications/5b028c2f-5343-45f9-9d56-26949d3eeb3b https://doi.org/10.3354/meps14440 http://www.scopus.com/inward/record.url?scp=85185404943&partnerID=8YFLogxK eng eng https://pure.au.dk/portal/en/publications/5b028c2f-5343-45f9-9d56-26949d3eeb3b info:eu-repo/semantics/openAccess Land-Miller , H , Roos , A M , Simon , M , Dietz , R , Sonne , C , Pedro , S , Rosing-Asvid , A , Rigét , F F & McKinney , M A 2024 , ' Comparison of feeding niches between Arctic and northward-moving sub-Arctic marine mammals in Greenland ' , Marine Ecology - Progress Series , vol. 728 , pp. 163-182 . https://doi.org/10.3354/meps14440 , https://doi.org/10.3354/meps14440 Foraging niche breadth whale seal LIPID EXTRACTION 13C 15N 34S stable isotopes fatty acids article 2024 ftuniaarhuspubl https://doi.org/10.3354/meps14440 2024-07-01T23:46:33Z The climate change-induced northward movement of sub-Arctic marine mammals increases their range overlap and interactions with native Arctic species. We compared feeding patterns of 11 marine mammal species (4 Arctic and 7 sub-Arctic) in Greenland using stable isotope ratios and fatty acid signatures, and also assessed the effects of lipid extraction on stable isotope ratios. Lipid extraction showed limited increases in δ 13 C, intermediate effects on δ 15 N, and significant depletion of δ 34 S in muscle of some marine mammals. Arctic and sub-Arctic species differed in stable isotope ratios, indicating some use of separate food resources, while likely also reflecting baseline isotopic variation. Proportions of some of the most abundant fatty acids (20:1n9, 22:1n11, 20:5n3, 22:6n3) varied between Arctic and sub-Arctic species, indicating that sub-Arctic species rely mostly on a pelagic food web, while Arctic species exploit an ice-associated and benthic food web, although the sub-Arctic harp and hooded seals and Arctic narwhal showed opposite patterns. Sub-Arctic species had the largest niche breadths, implying diet flexibility and potential to adapt to further changes. Overall patterns in dietary tracers demonstrate separation of feeding niches between most Arctic and sub-Arctic marine mammals, but potential niche overlap and shared food resources for some species. Sub-Arctic seal species overlap the feeding niches of native Arctic species the most of all range-shifters, and of Arctic species, narwhal appear to be the most vulnerable to niche overlap and potential food competition with northward-shifting species. Article in Journal/Newspaper Arctic Arctic marine mammals Arctic Climate change Greenland narwhal* Aarhus University: Research Marine Ecology Progress Series SHIFT |
institution |
Open Polar |
collection |
Aarhus University: Research |
op_collection_id |
ftuniaarhuspubl |
language |
English |
topic |
Foraging niche breadth whale seal LIPID EXTRACTION 13C 15N 34S stable isotopes fatty acids |
spellingShingle |
Foraging niche breadth whale seal LIPID EXTRACTION 13C 15N 34S stable isotopes fatty acids Land-Miller, Haley Roos, Anna M. Simon, Malene Dietz, Rune Sonne, Christian Pedro, Sara Rosing-Asvid, Aqqalu Rigét, Frank F. McKinney, Melissa A. Comparison of feeding niches between Arctic and northward-moving sub-Arctic marine mammals in Greenland |
topic_facet |
Foraging niche breadth whale seal LIPID EXTRACTION 13C 15N 34S stable isotopes fatty acids |
description |
The climate change-induced northward movement of sub-Arctic marine mammals increases their range overlap and interactions with native Arctic species. We compared feeding patterns of 11 marine mammal species (4 Arctic and 7 sub-Arctic) in Greenland using stable isotope ratios and fatty acid signatures, and also assessed the effects of lipid extraction on stable isotope ratios. Lipid extraction showed limited increases in δ 13 C, intermediate effects on δ 15 N, and significant depletion of δ 34 S in muscle of some marine mammals. Arctic and sub-Arctic species differed in stable isotope ratios, indicating some use of separate food resources, while likely also reflecting baseline isotopic variation. Proportions of some of the most abundant fatty acids (20:1n9, 22:1n11, 20:5n3, 22:6n3) varied between Arctic and sub-Arctic species, indicating that sub-Arctic species rely mostly on a pelagic food web, while Arctic species exploit an ice-associated and benthic food web, although the sub-Arctic harp and hooded seals and Arctic narwhal showed opposite patterns. Sub-Arctic species had the largest niche breadths, implying diet flexibility and potential to adapt to further changes. Overall patterns in dietary tracers demonstrate separation of feeding niches between most Arctic and sub-Arctic marine mammals, but potential niche overlap and shared food resources for some species. Sub-Arctic seal species overlap the feeding niches of native Arctic species the most of all range-shifters, and of Arctic species, narwhal appear to be the most vulnerable to niche overlap and potential food competition with northward-shifting species. |
format |
Article in Journal/Newspaper |
author |
Land-Miller, Haley Roos, Anna M. Simon, Malene Dietz, Rune Sonne, Christian Pedro, Sara Rosing-Asvid, Aqqalu Rigét, Frank F. McKinney, Melissa A. |
author_facet |
Land-Miller, Haley Roos, Anna M. Simon, Malene Dietz, Rune Sonne, Christian Pedro, Sara Rosing-Asvid, Aqqalu Rigét, Frank F. McKinney, Melissa A. |
author_sort |
Land-Miller, Haley |
title |
Comparison of feeding niches between Arctic and northward-moving sub-Arctic marine mammals in Greenland |
title_short |
Comparison of feeding niches between Arctic and northward-moving sub-Arctic marine mammals in Greenland |
title_full |
Comparison of feeding niches between Arctic and northward-moving sub-Arctic marine mammals in Greenland |
title_fullStr |
Comparison of feeding niches between Arctic and northward-moving sub-Arctic marine mammals in Greenland |
title_full_unstemmed |
Comparison of feeding niches between Arctic and northward-moving sub-Arctic marine mammals in Greenland |
title_sort |
comparison of feeding niches between arctic and northward-moving sub-arctic marine mammals in greenland |
publishDate |
2024 |
url |
https://pure.au.dk/portal/en/publications/5b028c2f-5343-45f9-9d56-26949d3eeb3b https://doi.org/10.3354/meps14440 http://www.scopus.com/inward/record.url?scp=85185404943&partnerID=8YFLogxK |
genre |
Arctic Arctic marine mammals Arctic Climate change Greenland narwhal* |
genre_facet |
Arctic Arctic marine mammals Arctic Climate change Greenland narwhal* |
op_source |
Land-Miller , H , Roos , A M , Simon , M , Dietz , R , Sonne , C , Pedro , S , Rosing-Asvid , A , Rigét , F F & McKinney , M A 2024 , ' Comparison of feeding niches between Arctic and northward-moving sub-Arctic marine mammals in Greenland ' , Marine Ecology - Progress Series , vol. 728 , pp. 163-182 . https://doi.org/10.3354/meps14440 , https://doi.org/10.3354/meps14440 |
op_relation |
https://pure.au.dk/portal/en/publications/5b028c2f-5343-45f9-9d56-26949d3eeb3b |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.3354/meps14440 |
container_title |
Marine Ecology Progress Series |
container_volume |
SHIFT |
_version_ |
1810292153852624896 |