Resource-driven colonization by cod in a high Arctic food web
Climate change is commonly associated with many species redistributions and the influence of other factors may be marginalized, especially in the rapidly warming Arctic. The Barents Sea, a high latitude large marine ecosystem in the Northeast Atlantic has experienced above average temperatures since...
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ftzenodo:oai:zenodo.org:5646430 2023-06-06T11:50:48+02:00 Resource-driven colonization by cod in a high Arctic food web Johannesen, Edda Yoccoz, Nigel Tveraa, Torkild Shackell, Nancy Ellingsen, Kari Dolgov, Andrey Frank, Kenneth 2021-11-04 https://zenodo.org/record/5646430 https://doi.org/10.5061/dryad.3tx95x6dx unknown https://zenodo.org/communities/dryad https://zenodo.org/record/5646430 https://doi.org/10.5061/dryad.3tx95x6dx oai:zenodo.org:5646430 info:eu-repo/semantics/openAccess https://creativecommons.org/publicdomain/zero/1.0/legalcode info:eu-repo/semantics/other dataset 2021 ftzenodo https://doi.org/10.5061/dryad.3tx95x6dx 2023-04-13T21:09:40Z Climate change is commonly associated with many species redistributions and the influence of other factors may be marginalized, especially in the rapidly warming Arctic. The Barents Sea, a high latitude large marine ecosystem in the Northeast Atlantic has experienced above average temperatures since the mid 2000's with divergent bottom temperature trends at sub-regional scales. Concurrently, the Barents Sea stock of Atlantic cod Gadus morhua, one of the most important commercial fish stocks in the world, increased following a large reduction in fishing pressure and expanded north of 80°N. We examined the influence of food availability and temperature on cod expansion using a comprehensive data set on cod stomach fullness stratified by sub-regions characterized by divergent temperature trends. We then tested whether food availability, as indexed by cod stomach fullness, played a role in cod expansion in sub-regions that were warming, cooling or showed no trend. The greatest increase in cod occupancy occurred in three northern sub-regions with contrasting temperature trends. Cod apparently benefited from initial high food availability in these regions that previously had few large-bodied fish predators. The stomach fullness in the northern sub-regions declined rapidly after a few years of high cod abundance, suggesting that the arrival of cod caused a top down effect on the prey base. Prolonged cod residency in the northern Barents Sea is, therefore, not a certainty. Data from the Joint Russian Norwegian Ecosystem survey in the Barents Sea. The data are aggregated by sub-regions, see file data_script.txt and main paper for explanation. The raw data at the station level sampled by Norwegian boats at the surveys can be obtained from the Institute of Marine Research, Norway upon reasonable request. Special legal restrictions apply to Russian raw data. These can only be shared under contracted agreements. Funding provided by: Norges ForskningsrådCrossref Funder Registry ID: ... Dataset Arctic atlantic cod Barents Sea Climate change Gadus morhua Northeast Atlantic Zenodo Arctic Barents Sea Norway |
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description |
Climate change is commonly associated with many species redistributions and the influence of other factors may be marginalized, especially in the rapidly warming Arctic. The Barents Sea, a high latitude large marine ecosystem in the Northeast Atlantic has experienced above average temperatures since the mid 2000's with divergent bottom temperature trends at sub-regional scales. Concurrently, the Barents Sea stock of Atlantic cod Gadus morhua, one of the most important commercial fish stocks in the world, increased following a large reduction in fishing pressure and expanded north of 80°N. We examined the influence of food availability and temperature on cod expansion using a comprehensive data set on cod stomach fullness stratified by sub-regions characterized by divergent temperature trends. We then tested whether food availability, as indexed by cod stomach fullness, played a role in cod expansion in sub-regions that were warming, cooling or showed no trend. The greatest increase in cod occupancy occurred in three northern sub-regions with contrasting temperature trends. Cod apparently benefited from initial high food availability in these regions that previously had few large-bodied fish predators. The stomach fullness in the northern sub-regions declined rapidly after a few years of high cod abundance, suggesting that the arrival of cod caused a top down effect on the prey base. Prolonged cod residency in the northern Barents Sea is, therefore, not a certainty. Data from the Joint Russian Norwegian Ecosystem survey in the Barents Sea. The data are aggregated by sub-regions, see file data_script.txt and main paper for explanation. The raw data at the station level sampled by Norwegian boats at the surveys can be obtained from the Institute of Marine Research, Norway upon reasonable request. Special legal restrictions apply to Russian raw data. These can only be shared under contracted agreements. Funding provided by: Norges ForskningsrådCrossref Funder Registry ID: ... |
format |
Dataset |
author |
Johannesen, Edda Yoccoz, Nigel Tveraa, Torkild Shackell, Nancy Ellingsen, Kari Dolgov, Andrey Frank, Kenneth |
spellingShingle |
Johannesen, Edda Yoccoz, Nigel Tveraa, Torkild Shackell, Nancy Ellingsen, Kari Dolgov, Andrey Frank, Kenneth Resource-driven colonization by cod in a high Arctic food web |
author_facet |
Johannesen, Edda Yoccoz, Nigel Tveraa, Torkild Shackell, Nancy Ellingsen, Kari Dolgov, Andrey Frank, Kenneth |
author_sort |
Johannesen, Edda |
title |
Resource-driven colonization by cod in a high Arctic food web |
title_short |
Resource-driven colonization by cod in a high Arctic food web |
title_full |
Resource-driven colonization by cod in a high Arctic food web |
title_fullStr |
Resource-driven colonization by cod in a high Arctic food web |
title_full_unstemmed |
Resource-driven colonization by cod in a high Arctic food web |
title_sort |
resource-driven colonization by cod in a high arctic food web |
publishDate |
2021 |
url |
https://zenodo.org/record/5646430 https://doi.org/10.5061/dryad.3tx95x6dx |
geographic |
Arctic Barents Sea Norway |
geographic_facet |
Arctic Barents Sea Norway |
genre |
Arctic atlantic cod Barents Sea Climate change Gadus morhua Northeast Atlantic |
genre_facet |
Arctic atlantic cod Barents Sea Climate change Gadus morhua Northeast Atlantic |
op_relation |
https://zenodo.org/communities/dryad https://zenodo.org/record/5646430 https://doi.org/10.5061/dryad.3tx95x6dx oai:zenodo.org:5646430 |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/publicdomain/zero/1.0/legalcode |
op_doi |
https://doi.org/10.5061/dryad.3tx95x6dx |
_version_ |
1767956529194991616 |