Emperors on thin ice: three years of breeding failure at Halley Bay
Abstract Satellite imagery is used to show that the world's second largest emperor penguin colony, at Halley Bay, has suffered three years of almost total breeding failure. Although, like all emperor colonies, there has been large inter-annual variability in the breeding success at this site, t...
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Online Access: | http://dx.doi.org/10.1017/s0954102019000099 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102019000099 |
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crcambridgeupr:10.1017/s0954102019000099 2024-09-15T17:49:05+00:00 Emperors on thin ice: three years of breeding failure at Halley Bay Fretwell, Peter T. Trathan, Philip N. 2019 http://dx.doi.org/10.1017/s0954102019000099 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102019000099 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms https://www.cambridge.org/core/terms Antarctic Science volume 31, issue 3, page 133-138 ISSN 0954-1020 1365-2079 journal-article 2019 crcambridgeupr https://doi.org/10.1017/s0954102019000099 2024-08-07T04:04:30Z Abstract Satellite imagery is used to show that the world's second largest emperor penguin colony, at Halley Bay, has suffered three years of almost total breeding failure. Although, like all emperor colonies, there has been large inter-annual variability in the breeding success at this site, the prolonged period of failure is unprecedented in the historical record. The observed events followed the early breakup of the fast ice in the ice creeks that the birds habitually used for breeding. The initial breakup was associated with a particularly stormy period in September 2015, which corresponded with the strongest El Niño in over 60 years, strong winds, and a record low sea-ice year locally. Conditions have not recovered in the two years since. Meanwhile, during the same three-year period, the nearby Dawson-Lambton colony, 55 km to the south, has seen a more than tenfold increase in penguin numbers. The authors associate this with immigration from the birds previously breeding at Halley Bay. Studying this ‘tale of two cities’ provides valuable information relevant to modelling penguin movement under future climate change scenarios. Article in Journal/Newspaper Antarctic Science Sea ice Cambridge University Press Antarctic Science 31 3 133 138 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
description |
Abstract Satellite imagery is used to show that the world's second largest emperor penguin colony, at Halley Bay, has suffered three years of almost total breeding failure. Although, like all emperor colonies, there has been large inter-annual variability in the breeding success at this site, the prolonged period of failure is unprecedented in the historical record. The observed events followed the early breakup of the fast ice in the ice creeks that the birds habitually used for breeding. The initial breakup was associated with a particularly stormy period in September 2015, which corresponded with the strongest El Niño in over 60 years, strong winds, and a record low sea-ice year locally. Conditions have not recovered in the two years since. Meanwhile, during the same three-year period, the nearby Dawson-Lambton colony, 55 km to the south, has seen a more than tenfold increase in penguin numbers. The authors associate this with immigration from the birds previously breeding at Halley Bay. Studying this ‘tale of two cities’ provides valuable information relevant to modelling penguin movement under future climate change scenarios. |
format |
Article in Journal/Newspaper |
author |
Fretwell, Peter T. Trathan, Philip N. |
spellingShingle |
Fretwell, Peter T. Trathan, Philip N. Emperors on thin ice: three years of breeding failure at Halley Bay |
author_facet |
Fretwell, Peter T. Trathan, Philip N. |
author_sort |
Fretwell, Peter T. |
title |
Emperors on thin ice: three years of breeding failure at Halley Bay |
title_short |
Emperors on thin ice: three years of breeding failure at Halley Bay |
title_full |
Emperors on thin ice: three years of breeding failure at Halley Bay |
title_fullStr |
Emperors on thin ice: three years of breeding failure at Halley Bay |
title_full_unstemmed |
Emperors on thin ice: three years of breeding failure at Halley Bay |
title_sort |
emperors on thin ice: three years of breeding failure at halley bay |
publisher |
Cambridge University Press (CUP) |
publishDate |
2019 |
url |
http://dx.doi.org/10.1017/s0954102019000099 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102019000099 |
genre |
Antarctic Science Sea ice |
genre_facet |
Antarctic Science Sea ice |
op_source |
Antarctic Science volume 31, issue 3, page 133-138 ISSN 0954-1020 1365-2079 |
op_rights |
https://www.cambridge.org/core/terms https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0954102019000099 |
container_title |
Antarctic Science |
container_volume |
31 |
container_issue |
3 |
container_start_page |
133 |
op_container_end_page |
138 |
_version_ |
1810290783683608576 |