Advances in remote sensing of emperor penguins: first multi-year time series documenting trends in the global population
Like many polar animals, emperor penguin populations are challenging to monitor because of the species' life history and remoteness. Consequently, it has been difficult to establish its global status, a subject important to resolve as polar environments change. To advance our understanding of e...
Published in: | Proceedings of the Royal Society B: Biological Sciences |
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Online Access: | http://dx.doi.org/10.1098/rspb.2023.2067 https://royalsocietypublishing.org/doi/pdf/10.1098/rspb.2023.2067 https://royalsocietypublishing.org/doi/full-xml/10.1098/rspb.2023.2067 |
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crroyalsociety:10.1098/rspb.2023.2067 2024-10-20T14:04:07+00:00 Advances in remote sensing of emperor penguins: first multi-year time series documenting trends in the global population LaRue, Michelle Iles, David Labrousse, Sara Fretwell, Peter Ortega, David Devane, Eileen Horstmann, Isabella Viollat, Lise Foster-Dyer, Rose Le Bohec, Céline Zitterbart, Daniel Houstin, Aymeric Richter, Sebastian Winterl, Alexander Wienecke, Barbara Salas, Leo Nixon, Monique Barbraud, Christophe Kooyman, Gerald Ponganis, Paul Ainley, David Trathan, Philip Jenouvrier, Stephanie Biological and Physical Sciences Division World Wildlife Fund Division of Polar Programs 2024 http://dx.doi.org/10.1098/rspb.2023.2067 https://royalsocietypublishing.org/doi/pdf/10.1098/rspb.2023.2067 https://royalsocietypublishing.org/doi/full-xml/10.1098/rspb.2023.2067 en eng The Royal Society http://creativecommons.org/licenses/by/4.0/ http://creativecommons.org/licenses/by/4.0/ Proceedings of the Royal Society B: Biological Sciences volume 291, issue 2018 ISSN 0962-8452 1471-2954 journal-article 2024 crroyalsociety https://doi.org/10.1098/rspb.2023.2067 2024-10-07T04:25:54Z Like many polar animals, emperor penguin populations are challenging to monitor because of the species' life history and remoteness. Consequently, it has been difficult to establish its global status, a subject important to resolve as polar environments change. To advance our understanding of emperor penguins, we combined remote sensing, validation surveys and using Bayesian modelling, we estimated a comprehensive population trajectory over a recent 10-year period, encompassing the entirety of the species’ range. Reported as indices of abundance, our study indicates with 81% probability that there were fewer adult emperor penguins in 2018 than in 2009, with a posterior median decrease of 9.6% (95% credible interval (CI) −26.4% to +9.4%). The global population trend was −1.3% per year over this period (95% CI = −3.3% to +1.0%) and declines probably occurred in four of eight fast ice regions, irrespective of habitat conditions. Thus far, explanations have yet to be identified regarding trends, especially as we observed an apparent population uptick toward the end of time series. Our work potentially establishes a framework for monitoring other Antarctic coastal species detectable by satellite, while promoting a need for research to better understand factors driving biotic changes in the Southern Ocean ecosystem. Article in Journal/Newspaper Antarc* Antarctic Emperor penguins Southern Ocean The Royal Society Antarctic Southern Ocean Proceedings of the Royal Society B: Biological Sciences 291 2018 |
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Open Polar |
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The Royal Society |
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crroyalsociety |
language |
English |
description |
Like many polar animals, emperor penguin populations are challenging to monitor because of the species' life history and remoteness. Consequently, it has been difficult to establish its global status, a subject important to resolve as polar environments change. To advance our understanding of emperor penguins, we combined remote sensing, validation surveys and using Bayesian modelling, we estimated a comprehensive population trajectory over a recent 10-year period, encompassing the entirety of the species’ range. Reported as indices of abundance, our study indicates with 81% probability that there were fewer adult emperor penguins in 2018 than in 2009, with a posterior median decrease of 9.6% (95% credible interval (CI) −26.4% to +9.4%). The global population trend was −1.3% per year over this period (95% CI = −3.3% to +1.0%) and declines probably occurred in four of eight fast ice regions, irrespective of habitat conditions. Thus far, explanations have yet to be identified regarding trends, especially as we observed an apparent population uptick toward the end of time series. Our work potentially establishes a framework for monitoring other Antarctic coastal species detectable by satellite, while promoting a need for research to better understand factors driving biotic changes in the Southern Ocean ecosystem. |
author2 |
Biological and Physical Sciences Division World Wildlife Fund Division of Polar Programs |
format |
Article in Journal/Newspaper |
author |
LaRue, Michelle Iles, David Labrousse, Sara Fretwell, Peter Ortega, David Devane, Eileen Horstmann, Isabella Viollat, Lise Foster-Dyer, Rose Le Bohec, Céline Zitterbart, Daniel Houstin, Aymeric Richter, Sebastian Winterl, Alexander Wienecke, Barbara Salas, Leo Nixon, Monique Barbraud, Christophe Kooyman, Gerald Ponganis, Paul Ainley, David Trathan, Philip Jenouvrier, Stephanie |
spellingShingle |
LaRue, Michelle Iles, David Labrousse, Sara Fretwell, Peter Ortega, David Devane, Eileen Horstmann, Isabella Viollat, Lise Foster-Dyer, Rose Le Bohec, Céline Zitterbart, Daniel Houstin, Aymeric Richter, Sebastian Winterl, Alexander Wienecke, Barbara Salas, Leo Nixon, Monique Barbraud, Christophe Kooyman, Gerald Ponganis, Paul Ainley, David Trathan, Philip Jenouvrier, Stephanie Advances in remote sensing of emperor penguins: first multi-year time series documenting trends in the global population |
author_facet |
LaRue, Michelle Iles, David Labrousse, Sara Fretwell, Peter Ortega, David Devane, Eileen Horstmann, Isabella Viollat, Lise Foster-Dyer, Rose Le Bohec, Céline Zitterbart, Daniel Houstin, Aymeric Richter, Sebastian Winterl, Alexander Wienecke, Barbara Salas, Leo Nixon, Monique Barbraud, Christophe Kooyman, Gerald Ponganis, Paul Ainley, David Trathan, Philip Jenouvrier, Stephanie |
author_sort |
LaRue, Michelle |
title |
Advances in remote sensing of emperor penguins: first multi-year time series documenting trends in the global population |
title_short |
Advances in remote sensing of emperor penguins: first multi-year time series documenting trends in the global population |
title_full |
Advances in remote sensing of emperor penguins: first multi-year time series documenting trends in the global population |
title_fullStr |
Advances in remote sensing of emperor penguins: first multi-year time series documenting trends in the global population |
title_full_unstemmed |
Advances in remote sensing of emperor penguins: first multi-year time series documenting trends in the global population |
title_sort |
advances in remote sensing of emperor penguins: first multi-year time series documenting trends in the global population |
publisher |
The Royal Society |
publishDate |
2024 |
url |
http://dx.doi.org/10.1098/rspb.2023.2067 https://royalsocietypublishing.org/doi/pdf/10.1098/rspb.2023.2067 https://royalsocietypublishing.org/doi/full-xml/10.1098/rspb.2023.2067 |
geographic |
Antarctic Southern Ocean |
geographic_facet |
Antarctic Southern Ocean |
genre |
Antarc* Antarctic Emperor penguins Southern Ocean |
genre_facet |
Antarc* Antarctic Emperor penguins Southern Ocean |
op_source |
Proceedings of the Royal Society B: Biological Sciences volume 291, issue 2018 ISSN 0962-8452 1471-2954 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1098/rspb.2023.2067 |
container_title |
Proceedings of the Royal Society B: Biological Sciences |
container_volume |
291 |
container_issue |
2018 |
_version_ |
1813452018192220160 |