Past penguin colony responses to explosive volcanism on the Antarctic Peninsula

Stephen J. Roberts*, Patrick Monien*, Louise Foster, Julia Loftfield, Emma Hocking, Bernhard Schnetger, Emma Pearson, Steve Juggins, Peter Fretwell, Louise Ireland, Ryszard Ochyra, Anna Haworth, Claire Allen, Steven Moreton, Sarah Davies, Hans-Jürgen Brumsack, Michael Bentley, Dominic Hodgson

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

37 Citations (Scopus)
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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.
Original languageEnglish
Article number14914
Number of pages16
JournalNature Communications
Volume8
DOIs
Publication statusPublished - 11 Apr 2017

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