Driving forces of Antarctic krill abundance
Antarctic krill, crucial to the Southern Ocean ecosystem and a vital fisheries resource, is endangered by climate change. Identifying drivers of krill biomass is therefore essential for determining catch limits and designating protection zones. We present a modeling approach to pinpointing effects o...
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American Association for the Advancement of Science (AAAS)
2023
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Online Access: | http://dx.doi.org/10.1126/sciadv.adh4584 https://www.science.org/doi/pdf/10.1126/sciadv.adh4584 |
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craaas:10.1126/sciadv.adh4584 2024-06-09T07:39:26+00:00 Driving forces of Antarctic krill abundance Ryabov, Alexey Berger, Uta Blasius, Bernd Meyer, Bettina 2023 http://dx.doi.org/10.1126/sciadv.adh4584 https://www.science.org/doi/pdf/10.1126/sciadv.adh4584 en eng American Association for the Advancement of Science (AAAS) Science Advances volume 9, issue 50 ISSN 2375-2548 journal-article 2023 craaas https://doi.org/10.1126/sciadv.adh4584 2024-05-16T12:53:46Z Antarctic krill, crucial to the Southern Ocean ecosystem and a vital fisheries resource, is endangered by climate change. Identifying drivers of krill biomass is therefore essential for determining catch limits and designating protection zones. We present a modeling approach to pinpointing effects of sea surface temperature, ice cover, chlorophyll levels, climate indices, and intraspecific competition. Our study reveals that larval recruitment is driven by both competition among age classes and chlorophyll levels. In addition, while milder ice and temperature in spring and summer favor reproduction and early larval survival, both larvae and juveniles strongly benefit from heavier ice and colder temperatures in winter. We conclude that omitting top-down control of resources by krill is only acceptable for retrospective or single-year prognostic models that use field chlorophyll data but that incorporating intraspecific competition is essential for longer-term forecasts. Our findings can guide future krill modeling strategies, reinforcing the sustainability of this keystone species. Article in Journal/Newspaper Antarc* Antarctic Antarctic Krill Southern Ocean AAAS Resource Center (American Association for the Advancement of Science) Antarctic Southern Ocean Science Advances 9 50 |
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AAAS Resource Center (American Association for the Advancement of Science) |
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craaas |
language |
English |
description |
Antarctic krill, crucial to the Southern Ocean ecosystem and a vital fisheries resource, is endangered by climate change. Identifying drivers of krill biomass is therefore essential for determining catch limits and designating protection zones. We present a modeling approach to pinpointing effects of sea surface temperature, ice cover, chlorophyll levels, climate indices, and intraspecific competition. Our study reveals that larval recruitment is driven by both competition among age classes and chlorophyll levels. In addition, while milder ice and temperature in spring and summer favor reproduction and early larval survival, both larvae and juveniles strongly benefit from heavier ice and colder temperatures in winter. We conclude that omitting top-down control of resources by krill is only acceptable for retrospective or single-year prognostic models that use field chlorophyll data but that incorporating intraspecific competition is essential for longer-term forecasts. Our findings can guide future krill modeling strategies, reinforcing the sustainability of this keystone species. |
format |
Article in Journal/Newspaper |
author |
Ryabov, Alexey Berger, Uta Blasius, Bernd Meyer, Bettina |
spellingShingle |
Ryabov, Alexey Berger, Uta Blasius, Bernd Meyer, Bettina Driving forces of Antarctic krill abundance |
author_facet |
Ryabov, Alexey Berger, Uta Blasius, Bernd Meyer, Bettina |
author_sort |
Ryabov, Alexey |
title |
Driving forces of Antarctic krill abundance |
title_short |
Driving forces of Antarctic krill abundance |
title_full |
Driving forces of Antarctic krill abundance |
title_fullStr |
Driving forces of Antarctic krill abundance |
title_full_unstemmed |
Driving forces of Antarctic krill abundance |
title_sort |
driving forces of antarctic krill abundance |
publisher |
American Association for the Advancement of Science (AAAS) |
publishDate |
2023 |
url |
http://dx.doi.org/10.1126/sciadv.adh4584 https://www.science.org/doi/pdf/10.1126/sciadv.adh4584 |
geographic |
Antarctic Southern Ocean |
geographic_facet |
Antarctic Southern Ocean |
genre |
Antarc* Antarctic Antarctic Krill Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Krill Southern Ocean |
op_source |
Science Advances volume 9, issue 50 ISSN 2375-2548 |
op_doi |
https://doi.org/10.1126/sciadv.adh4584 |
container_title |
Science Advances |
container_volume |
9 |
container_issue |
50 |
_version_ |
1801379484265349120 |