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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ftdoajarticles:oai:doaj.org/article:607a7b096b2244d89e6f45958d8c799c 2023-05-15T13:33:51+02:00 Spatially Extensive Standardized Surveys Reveal Widespread, Multi-Decadal Increase in East Antarctic Adélie Penguin Populations. Colin Southwell Louise Emmerson John McKinlay Kym Newbery Akinori Takahashi Akiko Kato Christophe Barbraud Karine DeLord Henri Weimerskirch 2015-01-01T00:00:00Z https://doi.org/10.1371/journal.pone.0139877 https://doaj.org/article/607a7b096b2244d89e6f45958d8c799c EN eng Public Library of Science (PLoS) http://europepmc.org/articles/PMC4619065?pdf=render https://doaj.org/toc/1932-6203 1932-6203 doi:10.1371/journal.pone.0139877 https://doaj.org/article/607a7b096b2244d89e6f45958d8c799c PLoS ONE, Vol 10, Iss 10, p e0139877 (2015) Medicine R Science Q article 2015 ftdoajarticles https://doi.org/10.1371/journal.pone.0139877 2022-12-31T08:13:49Z 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. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica East Antarctica Ross Sea Sea ice Directory of Open Access Journals: DOAJ Articles Antarctic Antarctic Peninsula East Antarctica Ross Sea PLOS ONE 10 10 e0139877 |
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English |
topic |
Medicine R Science Q |
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Medicine R Science Q Colin Southwell Louise Emmerson John McKinlay Kym Newbery Akinori Takahashi Akiko Kato Christophe Barbraud Karine DeLord Henri Weimerskirch Spatially Extensive Standardized Surveys Reveal Widespread, Multi-Decadal Increase in East Antarctic Adélie Penguin Populations. |
topic_facet |
Medicine R Science Q |
description |
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 |
Article in Journal/Newspaper |
author |
Colin Southwell Louise Emmerson John McKinlay Kym Newbery Akinori Takahashi Akiko Kato Christophe Barbraud Karine DeLord Henri Weimerskirch |
author_facet |
Colin Southwell Louise Emmerson John McKinlay Kym Newbery Akinori Takahashi Akiko Kato Christophe Barbraud Karine DeLord Henri Weimerskirch |
author_sort |
Colin Southwell |
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 (PLoS) |
publishDate |
2015 |
url |
https://doi.org/10.1371/journal.pone.0139877 https://doaj.org/article/607a7b096b2244d89e6f45958d8c799c |
geographic |
Antarctic Antarctic Peninsula East Antarctica Ross Sea |
geographic_facet |
Antarctic Antarctic Peninsula East Antarctica Ross Sea |
genre |
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_source |
PLoS ONE, Vol 10, Iss 10, p e0139877 (2015) |
op_relation |
http://europepmc.org/articles/PMC4619065?pdf=render https://doaj.org/toc/1932-6203 1932-6203 doi:10.1371/journal.pone.0139877 https://doaj.org/article/607a7b096b2244d89e6f45958d8c799c |
op_doi |
https://doi.org/10.1371/journal.pone.0139877 |
container_title |
PLOS ONE |
container_volume |
10 |
container_issue |
10 |
container_start_page |
e0139877 |
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1766046482185584640 |