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Past penguin colony responses to explosive volcanism on the Antarctic Peninsula.

Roberts, S. and Monien, P. and Foster, L. and Loftfield, J. and Hocking, E. and Schnetger, B. and Pearson, E. and Juggins, S. and Fretwell, P. and Ireland, L. and Ochyra, R. and Howarth, A. and Allen, C. and Moreton, S. and Davies, S. and Brumsack, H. and Bentley, M.J. and Hodgson, D. (2017) 'Past penguin colony responses to explosive volcanism on the Antarctic Peninsula.', Nature communications., 8 . p. 14914.

Abstract

Changes in penguin populations on the Antarctic Peninsula have been linked to several environmental factors, but the potentially devastating impact of volcanic activity has not been considered. Here we use detailed biogeochemical analyses to track past penguin colony change over the last 8,500 years on Ardley Island, home to one of the Antarctic Peninsula’s largest breeding populations of gentoo penguins. The first sustained penguin colony was established on Ardley Island c. 6,700 years ago, pre-dating sub-fossil evidence of Peninsula-wide occupation by c. 1,000 years. The colony experienced five population maxima during the Holocene. Overall, we find no consistent relationships with local-regional atmospheric and ocean temperatures or sea-ice conditions, although the colony population maximum, c. 4,000–3,000 years ago, corresponds with regionally elevated temperatures. Instead, at least three of the five phases of penguin colony expansion were abruptly ended by large eruptions from the Deception Island volcano, resulting in near-complete local extinction of the colony, with, on average, 400–800 years required for sustainable recovery.

Item Type:Article
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Status:Peer-reviewed
Publisher Web site:https://doi.org/10.1038/ncomms14914
Publisher statement:This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ © The Author(s) 2017
Date accepted:14 February 2017
Date deposited:05 April 2017
Date of first online publication:11 April 2017
Date first made open access:03 May 2017

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