Emperors in Hiding: When Ice-Breakers and Satellites Complement Each Other in Antarctic Exploration
Evaluating the demographic trends of marine top predators is critical to understanding the processes involved in the ongoing rapid changes in Antarctic ecosystems. However, the remoteness and logistical complexity of operating in Antarctica, especially during winter, make such an assessment difficul...
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ftpubmed:oai:pubmedcentral.nih.gov:4070948 2023-05-15T13:36:31+02:00 Emperors in Hiding: When Ice-Breakers and Satellites Complement Each Other in Antarctic Exploration Ancel, André Cristofari, Robin Fretwell, Peter T. Trathan, Phil N. Wienecke, Barbara Boureau, Matthieu Morinay, Jennifer Blanc, Stéphane Le Maho, Yvon Le Bohec, Céline 2014-06-25 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4070948 http://www.ncbi.nlm.nih.gov/pubmed/24963661 https://doi.org/10.1371/journal.pone.0100404 en eng Public Library of Science http://www.ncbi.nlm.nih.gov/pmc/articles/PMC http://www.ncbi.nlm.nih.gov/pubmed/24963661 http://dx.doi.org/10.1371/journal.pone.0100404 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 2014 ftpubmed https://doi.org/10.1371/journal.pone.0100404 2014-06-29T01:00:34Z Evaluating the demographic trends of marine top predators is critical to understanding the processes involved in the ongoing rapid changes in Antarctic ecosystems. However, the remoteness and logistical complexity of operating in Antarctica, especially during winter, make such an assessment difficult. Satellite imaging is increasingly recognised as a valuable method for remote animal population monitoring, yet its accuracy and reliability are still to be fully evaluated. We report here the first ground visit of an emperor penguin colony first discovered by satellite, but also the discovery of a second one not indicated by satellite survey at that time. Several successive remote surveys in this coastal region of East Antarctica, both before and after sudden local changes, had indeed only identified one colony. These two colonies (with a total of ca. 7,400 breeding pairs) are located near the Mertz Glacier in an area that underwent tremendous habitat change after the glacier tongue broke off in February 2010. Our findings therefore suggest that a satellite survey, although offering a major advance since it allows a global imaging of emperor penguin colonies, may miss certain colony locations when challenged by certain features of polar ecosystems, such as snow cover, evolving ice topology, and rapidly changing habitat. Moreover our survey shows that this large seabird has considerable potential for rapid adaptation to sudden habitat loss, as the colony detected in 2009 may have moved and settled on new breeding grounds. Overall, the ability of emperor penguin colonies to relocate following habitat modification underlines the continued need for a mix of remote sensing and field surveys (aerial photography and ground counts), especially in the less-frequented parts of Antarctica, to gain reliable knowledge about the population demography and dynamics of this flagship species of the Antarctic ecosystem. Text Antarc* Antarctic Antarctica East Antarctica Mertz Glacier PubMed Central (PMC) Antarctic East Antarctica Mertz Glacier ENVELOPE(144.500,144.500,-67.667,-67.667) The Antarctic PLoS ONE 9 6 e100404 |
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English |
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Research Article |
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Research Article Ancel, André Cristofari, Robin Fretwell, Peter T. Trathan, Phil N. Wienecke, Barbara Boureau, Matthieu Morinay, Jennifer Blanc, Stéphane Le Maho, Yvon Le Bohec, Céline Emperors in Hiding: When Ice-Breakers and Satellites Complement Each Other in Antarctic Exploration |
topic_facet |
Research Article |
description |
Evaluating the demographic trends of marine top predators is critical to understanding the processes involved in the ongoing rapid changes in Antarctic ecosystems. However, the remoteness and logistical complexity of operating in Antarctica, especially during winter, make such an assessment difficult. Satellite imaging is increasingly recognised as a valuable method for remote animal population monitoring, yet its accuracy and reliability are still to be fully evaluated. We report here the first ground visit of an emperor penguin colony first discovered by satellite, but also the discovery of a second one not indicated by satellite survey at that time. Several successive remote surveys in this coastal region of East Antarctica, both before and after sudden local changes, had indeed only identified one colony. These two colonies (with a total of ca. 7,400 breeding pairs) are located near the Mertz Glacier in an area that underwent tremendous habitat change after the glacier tongue broke off in February 2010. Our findings therefore suggest that a satellite survey, although offering a major advance since it allows a global imaging of emperor penguin colonies, may miss certain colony locations when challenged by certain features of polar ecosystems, such as snow cover, evolving ice topology, and rapidly changing habitat. Moreover our survey shows that this large seabird has considerable potential for rapid adaptation to sudden habitat loss, as the colony detected in 2009 may have moved and settled on new breeding grounds. Overall, the ability of emperor penguin colonies to relocate following habitat modification underlines the continued need for a mix of remote sensing and field surveys (aerial photography and ground counts), especially in the less-frequented parts of Antarctica, to gain reliable knowledge about the population demography and dynamics of this flagship species of the Antarctic ecosystem. |
format |
Text |
author |
Ancel, André Cristofari, Robin Fretwell, Peter T. Trathan, Phil N. Wienecke, Barbara Boureau, Matthieu Morinay, Jennifer Blanc, Stéphane Le Maho, Yvon Le Bohec, Céline |
author_facet |
Ancel, André Cristofari, Robin Fretwell, Peter T. Trathan, Phil N. Wienecke, Barbara Boureau, Matthieu Morinay, Jennifer Blanc, Stéphane Le Maho, Yvon Le Bohec, Céline |
author_sort |
Ancel, André |
title |
Emperors in Hiding: When Ice-Breakers and Satellites Complement Each Other in Antarctic Exploration |
title_short |
Emperors in Hiding: When Ice-Breakers and Satellites Complement Each Other in Antarctic Exploration |
title_full |
Emperors in Hiding: When Ice-Breakers and Satellites Complement Each Other in Antarctic Exploration |
title_fullStr |
Emperors in Hiding: When Ice-Breakers and Satellites Complement Each Other in Antarctic Exploration |
title_full_unstemmed |
Emperors in Hiding: When Ice-Breakers and Satellites Complement Each Other in Antarctic Exploration |
title_sort |
emperors in hiding: when ice-breakers and satellites complement each other in antarctic exploration |
publisher |
Public Library of Science |
publishDate |
2014 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4070948 http://www.ncbi.nlm.nih.gov/pubmed/24963661 https://doi.org/10.1371/journal.pone.0100404 |
long_lat |
ENVELOPE(144.500,144.500,-67.667,-67.667) |
geographic |
Antarctic East Antarctica Mertz Glacier The Antarctic |
geographic_facet |
Antarctic East Antarctica Mertz Glacier The Antarctic |
genre |
Antarc* Antarctic Antarctica East Antarctica Mertz Glacier |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Mertz Glacier |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC http://www.ncbi.nlm.nih.gov/pubmed/24963661 http://dx.doi.org/10.1371/journal.pone.0100404 |
op_rights |
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. |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1371/journal.pone.0100404 |
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PLoS ONE |
container_volume |
9 |
container_issue |
6 |
container_start_page |
e100404 |
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1766079624935112704 |