Overwinter sea-ice characteristics important for Antarctic krill recruitment in the southwest Atlantic
Climate change alters the extent and structure of sea-ice environments, which affects how they function as a habitat for polar species. Identifying sea-ice characteristics that serve as indicators of habitat quality will be crucial to the monitoring and management of climate change impacts. In the S...
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ftdoajarticles:oai:doaj.org/article:c46f297c8cd14f2fab355e71029b9117 2023-05-15T14:05:04+02:00 Overwinter sea-ice characteristics important for Antarctic krill recruitment in the southwest Atlantic Devi Veytia Sophie Bestley So Kawaguchi Klaus M. Meiners Eugene J. Murphy Alexander D. Fraser Kazuya Kusahara Noriaki Kimura Stuart Corney 2021-10-01T00:00:00Z https://doi.org/10.1016/j.ecolind.2021.107934 https://doaj.org/article/c46f297c8cd14f2fab355e71029b9117 EN eng Elsevier http://www.sciencedirect.com/science/article/pii/S1470160X21005999 https://doaj.org/toc/1470-160X 1470-160X doi:10.1016/j.ecolind.2021.107934 https://doaj.org/article/c46f297c8cd14f2fab355e71029b9117 Ecological Indicators, Vol 129, Iss , Pp 107934- (2021) Climate change Sea ice Antarctic krill Euphausia superba Overwinter survival Recruitment Ecology QH540-549.5 article 2021 ftdoajarticles https://doi.org/10.1016/j.ecolind.2021.107934 2022-12-31T05:21:31Z Climate change alters the extent and structure of sea-ice environments, which affects how they function as a habitat for polar species. Identifying sea-ice characteristics that serve as indicators of habitat quality will be crucial to the monitoring and management of climate change impacts. In the Southern Ocean, Antarctic krill is a key prey species and fishery target. Krill larvae depend upon sea-ice habitats to survive the winter and recruit to the population in spring. Existing observations of sea-ice characteristics lack sufficient spatiotemporal coverage to quantify which ones contribute to favourable overwintering habitat, leading to uncertainties in how current and future changes in sea ice affect krill populations. Here, we derive regional-scale indices of annual krill recruitment spanning 35 years across the southwest Atlantic. To develop meaningful indicators of sea-ice habitat, we selected variables from a high-resolution sea-ice model that are hypothesized as relevant for larval habitat use. The resulting correlations between recruitment and sea-ice indicators vary by region and show remote connections to sea ice that correspond with established theories of larval transport. Through an improved representation of sea-ice habitat quality, as compared with using more traditional satellite-derived variables such as sea-ice extent and duration, we highlight plausible regions of overwintering habitat. Our findings improve current understanding of how krill are likely responding to changing sea ice and support emerging views that larval habitat use is complex. Furthermore, regional variation in larval dependence on sea ice may provide pockets of resilience to change for the broader krill population. Article in Journal/Newspaper Antarc* Antarctic Antarctic Krill Euphausia superba Sea ice Southern Ocean Directory of Open Access Journals: DOAJ Articles Antarctic Southern Ocean Ecological Indicators 129 107934 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Climate change Sea ice Antarctic krill Euphausia superba Overwinter survival Recruitment Ecology QH540-549.5 |
spellingShingle |
Climate change Sea ice Antarctic krill Euphausia superba Overwinter survival Recruitment Ecology QH540-549.5 Devi Veytia Sophie Bestley So Kawaguchi Klaus M. Meiners Eugene J. Murphy Alexander D. Fraser Kazuya Kusahara Noriaki Kimura Stuart Corney Overwinter sea-ice characteristics important for Antarctic krill recruitment in the southwest Atlantic |
topic_facet |
Climate change Sea ice Antarctic krill Euphausia superba Overwinter survival Recruitment Ecology QH540-549.5 |
description |
Climate change alters the extent and structure of sea-ice environments, which affects how they function as a habitat for polar species. Identifying sea-ice characteristics that serve as indicators of habitat quality will be crucial to the monitoring and management of climate change impacts. In the Southern Ocean, Antarctic krill is a key prey species and fishery target. Krill larvae depend upon sea-ice habitats to survive the winter and recruit to the population in spring. Existing observations of sea-ice characteristics lack sufficient spatiotemporal coverage to quantify which ones contribute to favourable overwintering habitat, leading to uncertainties in how current and future changes in sea ice affect krill populations. Here, we derive regional-scale indices of annual krill recruitment spanning 35 years across the southwest Atlantic. To develop meaningful indicators of sea-ice habitat, we selected variables from a high-resolution sea-ice model that are hypothesized as relevant for larval habitat use. The resulting correlations between recruitment and sea-ice indicators vary by region and show remote connections to sea ice that correspond with established theories of larval transport. Through an improved representation of sea-ice habitat quality, as compared with using more traditional satellite-derived variables such as sea-ice extent and duration, we highlight plausible regions of overwintering habitat. Our findings improve current understanding of how krill are likely responding to changing sea ice and support emerging views that larval habitat use is complex. Furthermore, regional variation in larval dependence on sea ice may provide pockets of resilience to change for the broader krill population. |
format |
Article in Journal/Newspaper |
author |
Devi Veytia Sophie Bestley So Kawaguchi Klaus M. Meiners Eugene J. Murphy Alexander D. Fraser Kazuya Kusahara Noriaki Kimura Stuart Corney |
author_facet |
Devi Veytia Sophie Bestley So Kawaguchi Klaus M. Meiners Eugene J. Murphy Alexander D. Fraser Kazuya Kusahara Noriaki Kimura Stuart Corney |
author_sort |
Devi Veytia |
title |
Overwinter sea-ice characteristics important for Antarctic krill recruitment in the southwest Atlantic |
title_short |
Overwinter sea-ice characteristics important for Antarctic krill recruitment in the southwest Atlantic |
title_full |
Overwinter sea-ice characteristics important for Antarctic krill recruitment in the southwest Atlantic |
title_fullStr |
Overwinter sea-ice characteristics important for Antarctic krill recruitment in the southwest Atlantic |
title_full_unstemmed |
Overwinter sea-ice characteristics important for Antarctic krill recruitment in the southwest Atlantic |
title_sort |
overwinter sea-ice characteristics important for antarctic krill recruitment in the southwest atlantic |
publisher |
Elsevier |
publishDate |
2021 |
url |
https://doi.org/10.1016/j.ecolind.2021.107934 https://doaj.org/article/c46f297c8cd14f2fab355e71029b9117 |
geographic |
Antarctic Southern Ocean |
geographic_facet |
Antarctic Southern Ocean |
genre |
Antarc* Antarctic Antarctic Krill Euphausia superba Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Krill Euphausia superba Sea ice Southern Ocean |
op_source |
Ecological Indicators, Vol 129, Iss , Pp 107934- (2021) |
op_relation |
http://www.sciencedirect.com/science/article/pii/S1470160X21005999 https://doaj.org/toc/1470-160X 1470-160X doi:10.1016/j.ecolind.2021.107934 https://doaj.org/article/c46f297c8cd14f2fab355e71029b9117 |
op_doi |
https://doi.org/10.1016/j.ecolind.2021.107934 |
container_title |
Ecological Indicators |
container_volume |
129 |
container_start_page |
107934 |
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1766276713020391424 |