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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...

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Autores principales: Huang, Tao, Sun, Liguang, Long, Nanye, Wang, Yuhong, Huang, Wen
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2013
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.
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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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