Signals from the south; humpback whales carry messages of Antarctic sea‐ice ecosystem variability
Southern hemisphere humpback whales (Megaptera novaeangliae) rely on summer prey abundance of Antarctic krill (Euphausia superba) to fuel one of the longest‐known mammalian migrations on the planet. It is hypothesized that this species, already adapted to endure metabolic extremes, will be one of th...
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ftntnutrondheimi:oai:ntnuopen.ntnu.no:11250/2600197 2023-05-15T13:58:49+02:00 Signals from the south; humpback whales carry messages of Antarctic sea‐ice ecosystem variability Nash, Susan M. Bengtson Castrillon, Juliana Eisenmann, Pascale Fry, Brian Shuker, Jon D. Cropp, Roger A. Dawson, Amanda Bignert, Anders Bohlin-Nizzetto, Pernilla Waugh, Courtney Polkinghorne, Bradley J. Luche, Greta Dalle McLagan, David 2018 http://hdl.handle.net/11250/2600197 https://doi.org/10.1111/gcb.14035 eng eng Wiley Global Change Biology. 2018, 24 (4), 1500-1510. urn:issn:1354-1013 http://hdl.handle.net/11250/2600197 https://doi.org/10.1111/gcb.14035 cristin:1577625 1500-1510 24 Global Change Biology 4 Journal article Peer reviewed 2018 ftntnutrondheimi https://doi.org/10.1111/gcb.14035 2019-09-17T06:54:54Z Southern hemisphere humpback whales (Megaptera novaeangliae) rely on summer prey abundance of Antarctic krill (Euphausia superba) to fuel one of the longest‐known mammalian migrations on the planet. It is hypothesized that this species, already adapted to endure metabolic extremes, will be one of the first Antarctic consumers to show measurable physiological change in response to fluctuating prey availability in a changing climate; and as such, a powerful sentinel candidate for the Antarctic sea‐ice ecosystem. Here, we targeted the sentinel parameters of humpback whale adiposity and diet, using novel, as well as established, chemical and biochemical markers, and assembled a time trend spanning 8 years. We show the synchronous, inter‐annual oscillation of two measures of humpback whale adiposity with Southern Ocean environmental variables and climate indices. Furthermore, bulk stable isotope signatures provide clear indication of dietary compensation strategies, or a lower trophic level isotopic change, following years indicated as leaner years for the whales. The observed synchronicity of humpback whale adiposity and dietary markers, with climate patterns in the Southern Ocean, lends strength to the role of humpback whales as powerful Antarctic sea‐ice ecosystem sentinels. The work carries significant potential to reform current ecosystem surveillance in the Antarctic region. acceptedVersion This is the peer reviewed version of an article, which has been published in final form at [http://dx.doi.org/10.1111/gcb.14035]. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving. Article in Journal/Newspaper Antarc* Antarctic Antarctic Krill Euphausia superba Humpback Whale Megaptera novaeangliae Sea ice Southern Ocean NTNU Open Archive (Norwegian University of Science and Technology) Antarctic Southern Ocean The Antarctic The Sentinel ENVELOPE(73.317,73.317,-52.983,-52.983) Global Change Biology 24 4 1500 1510 |
institution |
Open Polar |
collection |
NTNU Open Archive (Norwegian University of Science and Technology) |
op_collection_id |
ftntnutrondheimi |
language |
English |
description |
Southern hemisphere humpback whales (Megaptera novaeangliae) rely on summer prey abundance of Antarctic krill (Euphausia superba) to fuel one of the longest‐known mammalian migrations on the planet. It is hypothesized that this species, already adapted to endure metabolic extremes, will be one of the first Antarctic consumers to show measurable physiological change in response to fluctuating prey availability in a changing climate; and as such, a powerful sentinel candidate for the Antarctic sea‐ice ecosystem. Here, we targeted the sentinel parameters of humpback whale adiposity and diet, using novel, as well as established, chemical and biochemical markers, and assembled a time trend spanning 8 years. We show the synchronous, inter‐annual oscillation of two measures of humpback whale adiposity with Southern Ocean environmental variables and climate indices. Furthermore, bulk stable isotope signatures provide clear indication of dietary compensation strategies, or a lower trophic level isotopic change, following years indicated as leaner years for the whales. The observed synchronicity of humpback whale adiposity and dietary markers, with climate patterns in the Southern Ocean, lends strength to the role of humpback whales as powerful Antarctic sea‐ice ecosystem sentinels. The work carries significant potential to reform current ecosystem surveillance in the Antarctic region. acceptedVersion This is the peer reviewed version of an article, which has been published in final form at [http://dx.doi.org/10.1111/gcb.14035]. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving. |
format |
Article in Journal/Newspaper |
author |
Nash, Susan M. Bengtson Castrillon, Juliana Eisenmann, Pascale Fry, Brian Shuker, Jon D. Cropp, Roger A. Dawson, Amanda Bignert, Anders Bohlin-Nizzetto, Pernilla Waugh, Courtney Polkinghorne, Bradley J. Luche, Greta Dalle McLagan, David |
spellingShingle |
Nash, Susan M. Bengtson Castrillon, Juliana Eisenmann, Pascale Fry, Brian Shuker, Jon D. Cropp, Roger A. Dawson, Amanda Bignert, Anders Bohlin-Nizzetto, Pernilla Waugh, Courtney Polkinghorne, Bradley J. Luche, Greta Dalle McLagan, David Signals from the south; humpback whales carry messages of Antarctic sea‐ice ecosystem variability |
author_facet |
Nash, Susan M. Bengtson Castrillon, Juliana Eisenmann, Pascale Fry, Brian Shuker, Jon D. Cropp, Roger A. Dawson, Amanda Bignert, Anders Bohlin-Nizzetto, Pernilla Waugh, Courtney Polkinghorne, Bradley J. Luche, Greta Dalle McLagan, David |
author_sort |
Nash, Susan M. Bengtson |
title |
Signals from the south; humpback whales carry messages of Antarctic sea‐ice ecosystem variability |
title_short |
Signals from the south; humpback whales carry messages of Antarctic sea‐ice ecosystem variability |
title_full |
Signals from the south; humpback whales carry messages of Antarctic sea‐ice ecosystem variability |
title_fullStr |
Signals from the south; humpback whales carry messages of Antarctic sea‐ice ecosystem variability |
title_full_unstemmed |
Signals from the south; humpback whales carry messages of Antarctic sea‐ice ecosystem variability |
title_sort |
signals from the south; humpback whales carry messages of antarctic sea‐ice ecosystem variability |
publisher |
Wiley |
publishDate |
2018 |
url |
http://hdl.handle.net/11250/2600197 https://doi.org/10.1111/gcb.14035 |
long_lat |
ENVELOPE(73.317,73.317,-52.983,-52.983) |
geographic |
Antarctic Southern Ocean The Antarctic The Sentinel |
geographic_facet |
Antarctic Southern Ocean The Antarctic The Sentinel |
genre |
Antarc* Antarctic Antarctic Krill Euphausia superba Humpback Whale Megaptera novaeangliae Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Krill Euphausia superba Humpback Whale Megaptera novaeangliae Sea ice Southern Ocean |
op_source |
1500-1510 24 Global Change Biology 4 |
op_relation |
Global Change Biology. 2018, 24 (4), 1500-1510. urn:issn:1354-1013 http://hdl.handle.net/11250/2600197 https://doi.org/10.1111/gcb.14035 cristin:1577625 |
op_doi |
https://doi.org/10.1111/gcb.14035 |
container_title |
Global Change Biology |
container_volume |
24 |
container_issue |
4 |
container_start_page |
1500 |
op_container_end_page |
1510 |
_version_ |
1766267190274686976 |