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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...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group
2013
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3786295/ https://www.ncbi.nlm.nih.gov/pubmed/24076768 http://dx.doi.org/10.1038/srep02807 |
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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 |
collection | PubMed |
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 δ(15)N (ratio of (15)N/(14)N) 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 δ(15)N 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 | Online Article Text |
id | pubmed-3786295 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2013 |
publisher | Nature Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-37862952013-09-30 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 Sci Rep Article 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 δ(15)N (ratio of (15)N/(14)N) 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 δ(15)N 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. Nature Publishing Group 2013-09-30 /pmc/articles/PMC3786295/ /pubmed/24076768 http://dx.doi.org/10.1038/srep02807 Text en 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/ |
spellingShingle | 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 |
title | 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_short | 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 |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3786295/ https://www.ncbi.nlm.nih.gov/pubmed/24076768 http://dx.doi.org/10.1038/srep02807 |
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