Direct and indirect effects of sea ice cover on major zooplankton groups and planktivorous fishes in the Barents Sea
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 plan...
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Online Access: | https://hdl.handle.net/11250/2647295 https://doi.org/10.1093/icesjms/fsz063 |
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ftimr:oai:imr.brage.unit.no:11250/2647295 2023-05-15T15:07:14+02:00 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 2019 application/pdf https://hdl.handle.net/11250/2647295 https://doi.org/10.1093/icesjms/fsz063 eng eng Norges forskningsråd: 255675 Norges forskningsråd: 276730 Norges forskningsråd: 228880 ICES Journal of Marine Science. 2019, 76 i24-i36. urn:issn:1054-3139 https://hdl.handle.net/11250/2647295 https://doi.org/10.1093/icesjms/fsz063 cristin:1723904 i24-i36 76 ICES Journal of Marine Science Peer reviewed Journal article 2019 ftimr https://doi.org/10.1093/icesjms/fsz063 2021-09-23T20:16:08Z 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. acceptedVersion Article in Journal/Newspaper Arctic Barents Sea Climate change polar cod Sea ice Zooplankton Copepods Institute for Marine Research: Brage IMR Arctic Barents Sea ICES Journal of Marine Science 76 Supplement_1 i24 i36 |
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Institute for Marine Research: Brage IMR |
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ftimr |
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English |
description |
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. acceptedVersion |
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 |
publishDate |
2019 |
url |
https://hdl.handle.net/11250/2647295 https://doi.org/10.1093/icesjms/fsz063 |
geographic |
Arctic Barents Sea |
geographic_facet |
Arctic Barents Sea |
genre |
Arctic Barents Sea Climate change polar cod Sea ice Zooplankton Copepods |
genre_facet |
Arctic Barents Sea Climate change polar cod Sea ice Zooplankton Copepods |
op_source |
i24-i36 76 ICES Journal of Marine Science |
op_relation |
Norges forskningsråd: 255675 Norges forskningsråd: 276730 Norges forskningsråd: 228880 ICES Journal of Marine Science. 2019, 76 i24-i36. urn:issn:1054-3139 https://hdl.handle.net/11250/2647295 https://doi.org/10.1093/icesjms/fsz063 cristin:1723904 |
op_doi |
https://doi.org/10.1093/icesjms/fsz063 |
container_title |
ICES Journal of Marine Science |
container_volume |
76 |
container_issue |
Supplement_1 |
container_start_page |
i24 |
op_container_end_page |
i36 |
_version_ |
1766338775247486976 |