Direct and indirect effects of sea ice cover on major zooplankton groups and planktivorous fishes in the Barents Sea
Abstract Reductions in Arctic sea ice affect marine food webs through a multitude of direct and indirect effects. We here analysed direct, indirect, and delayed associations between winter sea ice cover and year-to-year changes in biomasses of the main zooplankton groups (copepods, krill, amphipods)...
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Oxford University Press (OUP)
2019
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Online Access: | http://dx.doi.org/10.1093/icesjms/fsz063 http://academic.oup.com/icesjms/article-pdf/76/Supplement_1/i24/31809193/fsz063.pdf |
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croxfordunivpr:10.1093/icesjms/fsz063 2024-09-15T17:57:51+00:00 Direct and indirect effects of sea ice cover on major zooplankton groups and planktivorous fishes in the Barents Sea Stige, Leif Christian Eriksen, Elena Dalpadado, Padmini Ono, Kotaro Bartolino, Valerio Research Council of Norway RCN The Nansen Legacy Skagcore Trophic Interactions in the Barents Sea—steps toward Integrated Assessment 2019 http://dx.doi.org/10.1093/icesjms/fsz063 http://academic.oup.com/icesjms/article-pdf/76/Supplement_1/i24/31809193/fsz063.pdf en eng Oxford University Press (OUP) https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model ICES Journal of Marine Science volume 76, issue Supplement_1, page i24-i36 ISSN 1054-3139 1095-9289 journal-article 2019 croxfordunivpr https://doi.org/10.1093/icesjms/fsz063 2024-08-12T04:22:27Z Abstract Reductions in Arctic sea ice affect marine food webs through a multitude of direct and indirect effects. We here analysed direct, indirect, and delayed associations between winter sea ice cover and year-to-year changes in biomasses of the main zooplankton groups (copepods, krill, amphipods) and planktivorous fishes (capelin, polar cod) in the central and northern Barents Sea from 1980 to 2015. Climate effects and species interactions were estimated jointly in a Bayesian state-space model framework. We found that population biomass of capelin increased in years with low sea ice cover, while biomasses of copepods and amphipods decreased. Furthermore, results suggested strong bottom-up effects by krill on capelin and by copepods on amphipods and top-down effects by polar cod on amphipods and by capelin on krill and copepods. Sea ice effects thereby cascaded through the food web through indirect and delayed effects. The indirect and delayed effects amplified the effects of sea ice cover on capelin, copepods and amphipods. For krill, low sea ice cover most likely increased biomass in the short-term but reduced biomass in longer terms because of increased predation pressure. These findings suggest that both bottom-up and top-down processes need to be considered when projecting effects of future climate change on ecosystems. Article in Journal/Newspaper Barents Sea Climate change polar cod Sea ice Zooplankton Copepods Oxford University Press ICES Journal of Marine Science 76 Supplement_1 i24 i36 |
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Open Polar |
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Oxford University Press |
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croxfordunivpr |
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English |
description |
Abstract Reductions in Arctic sea ice affect marine food webs through a multitude of direct and indirect effects. We here analysed direct, indirect, and delayed associations between winter sea ice cover and year-to-year changes in biomasses of the main zooplankton groups (copepods, krill, amphipods) and planktivorous fishes (capelin, polar cod) in the central and northern Barents Sea from 1980 to 2015. Climate effects and species interactions were estimated jointly in a Bayesian state-space model framework. We found that population biomass of capelin increased in years with low sea ice cover, while biomasses of copepods and amphipods decreased. Furthermore, results suggested strong bottom-up effects by krill on capelin and by copepods on amphipods and top-down effects by polar cod on amphipods and by capelin on krill and copepods. Sea ice effects thereby cascaded through the food web through indirect and delayed effects. The indirect and delayed effects amplified the effects of sea ice cover on capelin, copepods and amphipods. For krill, low sea ice cover most likely increased biomass in the short-term but reduced biomass in longer terms because of increased predation pressure. These findings suggest that both bottom-up and top-down processes need to be considered when projecting effects of future climate change on ecosystems. |
author2 |
Bartolino, Valerio Research Council of Norway RCN The Nansen Legacy Skagcore Trophic Interactions in the Barents Sea—steps toward Integrated Assessment |
format |
Article in Journal/Newspaper |
author |
Stige, Leif Christian Eriksen, Elena Dalpadado, Padmini Ono, Kotaro |
spellingShingle |
Stige, Leif Christian Eriksen, Elena Dalpadado, Padmini Ono, Kotaro Direct and indirect effects of sea ice cover on major zooplankton groups and planktivorous fishes in the Barents Sea |
author_facet |
Stige, Leif Christian Eriksen, Elena Dalpadado, Padmini Ono, Kotaro |
author_sort |
Stige, Leif Christian |
title |
Direct and indirect effects of sea ice cover on major zooplankton groups and planktivorous fishes in the Barents Sea |
title_short |
Direct and indirect effects of sea ice cover on major zooplankton groups and planktivorous fishes in the Barents Sea |
title_full |
Direct and indirect effects of sea ice cover on major zooplankton groups and planktivorous fishes in the Barents Sea |
title_fullStr |
Direct and indirect effects of sea ice cover on major zooplankton groups and planktivorous fishes in the Barents Sea |
title_full_unstemmed |
Direct and indirect effects of sea ice cover on major zooplankton groups and planktivorous fishes in the Barents Sea |
title_sort |
direct and indirect effects of sea ice cover on major zooplankton groups and planktivorous fishes in the barents sea |
publisher |
Oxford University Press (OUP) |
publishDate |
2019 |
url |
http://dx.doi.org/10.1093/icesjms/fsz063 http://academic.oup.com/icesjms/article-pdf/76/Supplement_1/i24/31809193/fsz063.pdf |
genre |
Barents Sea Climate change polar cod Sea ice Zooplankton Copepods |
genre_facet |
Barents Sea Climate change polar cod Sea ice Zooplankton Copepods |
op_source |
ICES Journal of Marine Science volume 76, issue Supplement_1, page i24-i36 ISSN 1054-3139 1095-9289 |
op_rights |
https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model |
op_doi |
https://doi.org/10.1093/icesjms/fsz063 |
container_title |
ICES Journal of Marine Science |
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76 |
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Supplement_1 |
container_start_page |
i24 |
op_container_end_page |
i36 |
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1810434045578838016 |