Penguin tissue as a proxy for relative krill abundance in East Antarctica during the Holocene
Antarctic krill (Euphausia superba) is a key component of the Southern Ocean food web. It supports a large number of upper trophic-level predators, and is also a major fishery resource. Understanding changes in krill abundance has long been a priority for research and conservation in the Southern Oc...
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ftpubmed:oai:pubmedcentral.nih.gov:3786295 2023-05-15T13:42:47+02:00 Penguin tissue as a proxy for relative krill abundance in East Antarctica during the Holocene Huang, Tao Sun, Liguang Long, Nanye Wang, Yuhong Huang, Wen 2013-09-30 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3786295 http://www.ncbi.nlm.nih.gov/pubmed/24076768 https://doi.org/10.1038/srep02807 en eng Nature Publishing Group http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3786295 http://www.ncbi.nlm.nih.gov/pubmed/24076768 http://dx.doi.org/10.1038/srep02807 Copyright © 2013, Macmillan Publishers Limited. All rights reserved http://creativecommons.org/licenses/by-nc-nd/3.0/ This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-nd/3.0/ CC-BY-NC-ND Article Text 2013 ftpubmed https://doi.org/10.1038/srep02807 2013-10-06T01:06:42Z Antarctic krill (Euphausia superba) is a key component of the Southern Ocean food web. It supports a large number of upper trophic-level predators, and is also a major fishery resource. Understanding changes in krill abundance has long been a priority for research and conservation in the Southern Ocean. In this study, we performed stable isotope analyses on ancient Adélie penguin tissues and inferred relative krill abundance during the Holocene epoch from paleodiets of Adélie penguin (Pygoscelis adeliae), using inverse of δ15N (ratio of 15N/14N) value as a proxy. We find that variations in krill abundance during the Holocene are in accord with episodes of regional climate changes, showing greater krill abundance in cold periods. Moreover, the low δ15N values found in modern Adélie penguins indicate relatively high krill availability, which supports the hypothesis of krill surplus in modern ages due to recent hunt for krill-eating seals and whales by humans. Text Antarc* Antarctic Antarctic Krill Antarctica East Antarctica Euphausia superba Pygoscelis adeliae Southern Ocean PubMed Central (PMC) Antarctic East Antarctica Southern Ocean Scientific Reports 3 1 |
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Article Huang, Tao Sun, Liguang Long, Nanye Wang, Yuhong Huang, Wen Penguin tissue as a proxy for relative krill abundance in East Antarctica during the Holocene |
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Article |
description |
Antarctic krill (Euphausia superba) is a key component of the Southern Ocean food web. It supports a large number of upper trophic-level predators, and is also a major fishery resource. Understanding changes in krill abundance has long been a priority for research and conservation in the Southern Ocean. In this study, we performed stable isotope analyses on ancient Adélie penguin tissues and inferred relative krill abundance during the Holocene epoch from paleodiets of Adélie penguin (Pygoscelis adeliae), using inverse of δ15N (ratio of 15N/14N) value as a proxy. We find that variations in krill abundance during the Holocene are in accord with episodes of regional climate changes, showing greater krill abundance in cold periods. Moreover, the low δ15N values found in modern Adélie penguins indicate relatively high krill availability, which supports the hypothesis of krill surplus in modern ages due to recent hunt for krill-eating seals and whales by humans. |
format |
Text |
author |
Huang, Tao Sun, Liguang Long, Nanye Wang, Yuhong Huang, Wen |
author_facet |
Huang, Tao Sun, Liguang Long, Nanye Wang, Yuhong Huang, Wen |
author_sort |
Huang, Tao |
title |
Penguin tissue as a proxy for relative krill abundance in East Antarctica during the Holocene |
title_short |
Penguin tissue as a proxy for relative krill abundance in East Antarctica during the Holocene |
title_full |
Penguin tissue as a proxy for relative krill abundance in East Antarctica during the Holocene |
title_fullStr |
Penguin tissue as a proxy for relative krill abundance in East Antarctica during the Holocene |
title_full_unstemmed |
Penguin tissue as a proxy for relative krill abundance in East Antarctica during the Holocene |
title_sort |
penguin tissue as a proxy for relative krill abundance in east antarctica during the holocene |
publisher |
Nature Publishing Group |
publishDate |
2013 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3786295 http://www.ncbi.nlm.nih.gov/pubmed/24076768 https://doi.org/10.1038/srep02807 |
geographic |
Antarctic East Antarctica Southern Ocean |
geographic_facet |
Antarctic East Antarctica Southern Ocean |
genre |
Antarc* Antarctic Antarctic Krill Antarctica East Antarctica Euphausia superba Pygoscelis adeliae Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Krill Antarctica East Antarctica Euphausia superba Pygoscelis adeliae Southern Ocean |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3786295 http://www.ncbi.nlm.nih.gov/pubmed/24076768 http://dx.doi.org/10.1038/srep02807 |
op_rights |
Copyright © 2013, Macmillan Publishers Limited. All rights reserved http://creativecommons.org/licenses/by-nc-nd/3.0/ This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-nd/3.0/ |
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CC-BY-NC-ND |
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https://doi.org/10.1038/srep02807 |
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Scientific Reports |
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3 |
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1 |
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1766172754356207616 |