Spatially Extensive Standardized Surveys Reveal Widespread, Multi-Decadal Increase in East Antarctic Adélie Penguin Populations
Seabirds are considered to be useful and practical indicators of the state of marine ecosystems because they integrate across changes in the lower trophic levels and the physical environment. Signals from this key group of species can indicate broad scale impacts or response to environmental change....
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ftpubmed:oai:pubmedcentral.nih.gov:4619065 2023-05-15T13:50:34+02:00 Spatially Extensive Standardized Surveys Reveal Widespread, Multi-Decadal Increase in East Antarctic Adélie Penguin Populations Southwell, Colin Emmerson, Louise McKinlay, John Newbery, Kym Takahashi, Akinori Kato, Akiko Barbraud, Christophe DeLord, Karine Weimerskirch, Henri 2015-10-21 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4619065/ http://www.ncbi.nlm.nih.gov/pubmed/26488299 https://doi.org/10.1371/journal.pone.0139877 en eng Public Library of Science http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4619065/ http://www.ncbi.nlm.nih.gov/pubmed/26488299 http://dx.doi.org/10.1371/journal.pone.0139877 http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited CC-BY Research Article Text 2015 ftpubmed https://doi.org/10.1371/journal.pone.0139877 2015-11-01T01:27:27Z Seabirds are considered to be useful and practical indicators of the state of marine ecosystems because they integrate across changes in the lower trophic levels and the physical environment. Signals from this key group of species can indicate broad scale impacts or response to environmental change. Recent studies of penguin populations, the most commonly abundant Antarctic seabirds in the west Antarctic Peninsula and western Ross Sea, have demonstrated that physical changes in Antarctic marine environments have profound effects on biota at high trophic levels. Large populations of the circumpolar-breeding Adélie penguin occur in East Antarctica, but direct, standardized population data across much of this vast coastline have been more limited than in other Antarctic regions. We combine extensive new population survey data, new population estimation methods, and re-interpreted historical survey data to assess decadal-scale change in East Antarctic Adélie penguin breeding populations. We show that, in contrast to the west Antarctic Peninsula and western Ross Sea where breeding populations have decreased or shown variable trends over the last 30 years, East Antarctic regional populations have almost doubled in abundance since the 1980’s and have been increasing since the earliest counts in the 1960’s. The population changes are associated with five-year lagged changes in the physical environment, suggesting that the changing environment impacts primarily on the pre-breeding age classes. East Antarctic marine ecosystems have been subject to a number of changes over the last 50 years which may have influenced Adélie penguin population growth, including decadal-scale climate variation, an inferred mid-20th century sea-ice contraction, and early-to-mid 20th century exploitation of fish and whale populations. Text Antarc* Antarctic Antarctic Peninsula Antarctica East Antarctica Ross Sea Sea ice PubMed Central (PMC) Antarctic Antarctic Peninsula East Antarctica Ross Sea PLOS ONE 10 10 e0139877 |
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Research Article Southwell, Colin Emmerson, Louise McKinlay, John Newbery, Kym Takahashi, Akinori Kato, Akiko Barbraud, Christophe DeLord, Karine Weimerskirch, Henri Spatially Extensive Standardized Surveys Reveal Widespread, Multi-Decadal Increase in East Antarctic Adélie Penguin Populations |
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Research Article |
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Seabirds are considered to be useful and practical indicators of the state of marine ecosystems because they integrate across changes in the lower trophic levels and the physical environment. Signals from this key group of species can indicate broad scale impacts or response to environmental change. Recent studies of penguin populations, the most commonly abundant Antarctic seabirds in the west Antarctic Peninsula and western Ross Sea, have demonstrated that physical changes in Antarctic marine environments have profound effects on biota at high trophic levels. Large populations of the circumpolar-breeding Adélie penguin occur in East Antarctica, but direct, standardized population data across much of this vast coastline have been more limited than in other Antarctic regions. We combine extensive new population survey data, new population estimation methods, and re-interpreted historical survey data to assess decadal-scale change in East Antarctic Adélie penguin breeding populations. We show that, in contrast to the west Antarctic Peninsula and western Ross Sea where breeding populations have decreased or shown variable trends over the last 30 years, East Antarctic regional populations have almost doubled in abundance since the 1980’s and have been increasing since the earliest counts in the 1960’s. The population changes are associated with five-year lagged changes in the physical environment, suggesting that the changing environment impacts primarily on the pre-breeding age classes. East Antarctic marine ecosystems have been subject to a number of changes over the last 50 years which may have influenced Adélie penguin population growth, including decadal-scale climate variation, an inferred mid-20th century sea-ice contraction, and early-to-mid 20th century exploitation of fish and whale populations. |
format |
Text |
author |
Southwell, Colin Emmerson, Louise McKinlay, John Newbery, Kym Takahashi, Akinori Kato, Akiko Barbraud, Christophe DeLord, Karine Weimerskirch, Henri |
author_facet |
Southwell, Colin Emmerson, Louise McKinlay, John Newbery, Kym Takahashi, Akinori Kato, Akiko Barbraud, Christophe DeLord, Karine Weimerskirch, Henri |
author_sort |
Southwell, Colin |
title |
Spatially Extensive Standardized Surveys Reveal Widespread, Multi-Decadal Increase in East Antarctic Adélie Penguin Populations |
title_short |
Spatially Extensive Standardized Surveys Reveal Widespread, Multi-Decadal Increase in East Antarctic Adélie Penguin Populations |
title_full |
Spatially Extensive Standardized Surveys Reveal Widespread, Multi-Decadal Increase in East Antarctic Adélie Penguin Populations |
title_fullStr |
Spatially Extensive Standardized Surveys Reveal Widespread, Multi-Decadal Increase in East Antarctic Adélie Penguin Populations |
title_full_unstemmed |
Spatially Extensive Standardized Surveys Reveal Widespread, Multi-Decadal Increase in East Antarctic Adélie Penguin Populations |
title_sort |
spatially extensive standardized surveys reveal widespread, multi-decadal increase in east antarctic adélie penguin populations |
publisher |
Public Library of Science |
publishDate |
2015 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4619065/ http://www.ncbi.nlm.nih.gov/pubmed/26488299 https://doi.org/10.1371/journal.pone.0139877 |
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Antarctic Antarctic Peninsula East Antarctica Ross Sea |
geographic_facet |
Antarctic Antarctic Peninsula East Antarctica Ross Sea |
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Antarc* Antarctic Antarctic Peninsula Antarctica East Antarctica Ross Sea Sea ice |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica East Antarctica Ross Sea Sea ice |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4619065/ http://www.ncbi.nlm.nih.gov/pubmed/26488299 http://dx.doi.org/10.1371/journal.pone.0139877 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited |
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CC-BY |
op_doi |
https://doi.org/10.1371/journal.pone.0139877 |
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PLOS ONE |
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10 |
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10 |
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e0139877 |
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