The Effects of Sea-Ice Movement on Adélie Penguin Winter Migration Within the Ross
Global warming is disproportionately impacting polar regions, making it increasingly important to understand how and when wildlife depend on sea ice for their movements. Movement patterns within sea-ice fields have been much less studied compared to wind and ocean currents, even though sea ice is an...
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San Francisco State University
2022
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ftcalifstateuniv:oai:scholarworks:xg94hw31b 2024-09-30T14:26:41+00:00 The Effects of Sea-Ice Movement on Adélie Penguin Winter Migration Within the Ross Dennis Jongsomjit Ellen Hines Jerry Davis Grant Ballard 2022 https://hdl.handle.net/20.500.12680/xg94hw31b English eng San Francisco State University Science & Engineering Geographic Information Science http://hdl.handle.net/20.500.12680/xg94hw31b Copyright by Dennis Jongsomjit 2022 Masters Thesis 2022 ftcalifstateuniv https://doi.org/20.500.12680/xg94hw31b 2024-09-10T17:06:15Z Global warming is disproportionately impacting polar regions, making it increasingly important to understand how and when wildlife depend on sea ice for their movements. Movement patterns within sea-ice fields have been much less studied compared to wind and ocean currents, even though sea ice is an integral part of polar ecology. Adélie penguins (Pygoscelis adeliae) in the southern Ross Sea, Antarctica undergo the longest winter migration known for the species. Within and north of the Ross Sea, the Ross Gyre drives ocean circulation and the large-scale movement of sea-ice. We used remotely sensed ice movement data together with geolocation-based penguin movement data to test the hypothesis that penguins take advantage of sea-ice movement to aid their migration. We found that penguins travelled longer distances when their movement and sea ice-movement were aligned. Distances traveled were in part explained by which of two routes ("east" or "west") a penguin took. We found favorable sea-ice movement conditions occurred when penguins moved northward but ice support decreased through the winter. We also found that higher velocity of the Ross Gyre resulted in penguins being advected farther north, potentially into less productive waters and farther from their breeding colony. Changes in sea ice will have implications related to energy expenditure and ecological interactions and our findings provide further evidence that ice/ocean circulation patterns are important drivers of wildlife movement and life history patterns within the Ross Sea. https://doi.org/10.46569/20.500.12680/xg94hw31b Master Thesis Antarc* Antarctica Pygoscelis adeliae Ross Sea Sea ice Scholarworks from California State University Ross Sea |
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Scholarworks from California State University |
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ftcalifstateuniv |
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English |
description |
Global warming is disproportionately impacting polar regions, making it increasingly important to understand how and when wildlife depend on sea ice for their movements. Movement patterns within sea-ice fields have been much less studied compared to wind and ocean currents, even though sea ice is an integral part of polar ecology. Adélie penguins (Pygoscelis adeliae) in the southern Ross Sea, Antarctica undergo the longest winter migration known for the species. Within and north of the Ross Sea, the Ross Gyre drives ocean circulation and the large-scale movement of sea-ice. We used remotely sensed ice movement data together with geolocation-based penguin movement data to test the hypothesis that penguins take advantage of sea-ice movement to aid their migration. We found that penguins travelled longer distances when their movement and sea ice-movement were aligned. Distances traveled were in part explained by which of two routes ("east" or "west") a penguin took. We found favorable sea-ice movement conditions occurred when penguins moved northward but ice support decreased through the winter. We also found that higher velocity of the Ross Gyre resulted in penguins being advected farther north, potentially into less productive waters and farther from their breeding colony. Changes in sea ice will have implications related to energy expenditure and ecological interactions and our findings provide further evidence that ice/ocean circulation patterns are important drivers of wildlife movement and life history patterns within the Ross Sea. https://doi.org/10.46569/20.500.12680/xg94hw31b |
author2 |
Ellen Hines Jerry Davis Grant Ballard |
format |
Master Thesis |
author |
Dennis Jongsomjit |
spellingShingle |
Dennis Jongsomjit The Effects of Sea-Ice Movement on Adélie Penguin Winter Migration Within the Ross |
author_facet |
Dennis Jongsomjit |
author_sort |
Dennis Jongsomjit |
title |
The Effects of Sea-Ice Movement on Adélie Penguin Winter Migration Within the Ross |
title_short |
The Effects of Sea-Ice Movement on Adélie Penguin Winter Migration Within the Ross |
title_full |
The Effects of Sea-Ice Movement on Adélie Penguin Winter Migration Within the Ross |
title_fullStr |
The Effects of Sea-Ice Movement on Adélie Penguin Winter Migration Within the Ross |
title_full_unstemmed |
The Effects of Sea-Ice Movement on Adélie Penguin Winter Migration Within the Ross |
title_sort |
effects of sea-ice movement on adélie penguin winter migration within the ross |
publisher |
San Francisco State University |
publishDate |
2022 |
url |
https://hdl.handle.net/20.500.12680/xg94hw31b |
geographic |
Ross Sea |
geographic_facet |
Ross Sea |
genre |
Antarc* Antarctica Pygoscelis adeliae Ross Sea Sea ice |
genre_facet |
Antarc* Antarctica Pygoscelis adeliae Ross Sea Sea ice |
op_relation |
http://hdl.handle.net/20.500.12680/xg94hw31b |
op_rights |
Copyright by Dennis Jongsomjit 2022 |
op_doi |
https://doi.org/20.500.12680/xg94hw31b |
_version_ |
1811632810013753344 |