Antarctic climate change: extreme events disrupt plastic phenotypic response in Adélie penguins

 

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dc.contributor.author Lescroël, Amélie en_ZA
dc.contributor.author Ballard, Grant en_ZA
dc.contributor.author Grémillet, David en_ZA
dc.contributor.author Authier, Matthieu en_ZA
dc.contributor.author Ainley, David G en_ZA
dc.date.accessioned 2015-12-20T16:06:06Z
dc.date.available 2015-12-20T16:06:06Z
dc.date.issued 2014 en_ZA
dc.identifier.citation Lescroël, A., Ballard, G., Grémillet, D., Authier, M., & Ainley, D. G. (2014). Antarctic climate change: extreme events disrupt plastic phenotypic response in Adélie penguins. PloS one, 9(1), e85291. doi:10.1371/journal.pone.0085291 en_ZA
dc.identifier.uri http://hdl.handle.net/11427/15926
dc.identifier.uri http://dx.doi.org/10.1371/journal.pone.0085291
dc.description.abstract In the context of predicted alteration of sea ice cover and increased frequency of extreme events, it is especially timely to investigate plasticity within Antarctic species responding to a key environmental aspect of their ecology: sea ice variability. Using 13 years of longitudinal data, we investigated the effect of sea ice concentration (SIC) on the foraging efficiency of Adélie penguins ( Pygoscelis adeliae ) breeding in the Ross Sea. A 'natural experiment' brought by the exceptional presence of giant icebergs during 5 consecutive years provided unprecedented habitat variation for testing the effects of extreme events on the relationship between SIC and foraging efficiency in this sea-ice dependent species. Significant levels of phenotypic plasticity were evident in response to changes in SIC in normal environmental conditions. Maximum foraging efficiency occurred at relatively low SIC, peaking at 6.1% and decreasing with higher SIC. The 'natural experiment' uncoupled efficiency levels from SIC variations. Our study suggests that lower summer SIC than currently observed would benefit the foraging performance of Adélie penguins in their southernmost breeding area. Importantly, it also provides evidence that extreme climatic events can disrupt response plasticity in a wild seabird population. This questions the predictive power of relationships built on past observations, when not only the average climatic conditions are changing but the frequency of extreme climatic anomalies is also on the rise. en_ZA
dc.language.iso eng en_ZA
dc.publisher Public Library of Science en_ZA
dc.rights This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. en_ZA
dc.rights.uri http://creativecommons.org/licenses/by/4.0 en_ZA
dc.source PLoS One en_ZA
dc.source.uri http://journals.plos.org/plosone en_ZA
dc.subject.other Sea ice en_ZA
dc.subject.other Penguins en_ZA
dc.subject.other Foraging en_ZA
dc.subject.other Antarctica en_ZA
dc.subject.other Habitats en_ZA
dc.subject.other Ice shelf en_ZA
dc.subject.other Animal sexual behavior en_ZA
dc.subject.other Climate Change en_ZA
dc.title Antarctic climate change: extreme events disrupt plastic phenotypic response in Adélie penguins en_ZA
dc.type Journal Article en_ZA
dc.rights.holder © 2014 Lescroël et al en_ZA
uct.type.publication Research en_ZA
uct.type.resource Article en_ZA
dc.publisher.institution University of Cape Town
dc.publisher.faculty Faculty of Science en_ZA
dc.publisher.department Percy FitzPatrick Institute of African Ornithology en_ZA
uct.type.filetype Text
uct.type.filetype Image
dc.identifier.apacitation Lescroël, A., Ballard, G., Grémillet, D., Authier, M., & Ainley, D. G. (2014). Antarctic climate change: extreme events disrupt plastic phenotypic response in Adélie penguins. <i>PLoS One</i>, http://hdl.handle.net/11427/15926 en_ZA
dc.identifier.chicagocitation Lescroël, Amélie, Grant Ballard, David Grémillet, Matthieu Authier, and David G Ainley "Antarctic climate change: extreme events disrupt plastic phenotypic response in Adélie penguins." <i>PLoS One</i> (2014) http://hdl.handle.net/11427/15926 en_ZA
dc.identifier.vancouvercitation Lescroël A, Ballard G, Grémillet D, Authier M, Ainley DG. Antarctic climate change: extreme events disrupt plastic phenotypic response in Adélie penguins. PLoS One. 2014; http://hdl.handle.net/11427/15926. en_ZA
dc.identifier.ris TY - Journal Article AU - Lescroël, Amélie AU - Ballard, Grant AU - Grémillet, David AU - Authier, Matthieu AU - Ainley, David G AB - In the context of predicted alteration of sea ice cover and increased frequency of extreme events, it is especially timely to investigate plasticity within Antarctic species responding to a key environmental aspect of their ecology: sea ice variability. Using 13 years of longitudinal data, we investigated the effect of sea ice concentration (SIC) on the foraging efficiency of Adélie penguins ( Pygoscelis adeliae ) breeding in the Ross Sea. A 'natural experiment' brought by the exceptional presence of giant icebergs during 5 consecutive years provided unprecedented habitat variation for testing the effects of extreme events on the relationship between SIC and foraging efficiency in this sea-ice dependent species. Significant levels of phenotypic plasticity were evident in response to changes in SIC in normal environmental conditions. Maximum foraging efficiency occurred at relatively low SIC, peaking at 6.1% and decreasing with higher SIC. The 'natural experiment' uncoupled efficiency levels from SIC variations. Our study suggests that lower summer SIC than currently observed would benefit the foraging performance of Adélie penguins in their southernmost breeding area. Importantly, it also provides evidence that extreme climatic events can disrupt response plasticity in a wild seabird population. This questions the predictive power of relationships built on past observations, when not only the average climatic conditions are changing but the frequency of extreme climatic anomalies is also on the rise. DA - 2014 DB - OpenUCT DO - 10.1371/journal.pone.0085291 DP - University of Cape Town J1 - PLoS One LK - https://open.uct.ac.za PB - University of Cape Town PY - 2014 T1 - Antarctic climate change: extreme events disrupt plastic phenotypic response in Adélie penguins TI - Antarctic climate change: extreme events disrupt plastic phenotypic response in Adélie penguins UR - http://hdl.handle.net/11427/15926 ER - en_ZA


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This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Except where otherwise noted, this item's license is described as This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.