Resource‐driven colonization by cod in a high Arctic food web
Abstract 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 temperatu...
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crwiley:10.1002/ece3.7025 2024-09-15T17:55:33+00:00 Resource‐driven colonization by cod in a high Arctic food web Johannesen, Edda Yoccoz, Nigel G. Tveraa, Torkild Shackell, Nancy L. Ellingsen, Kari E. Dolgov, Andrey V. Frank, Kenneth T. Norges Forskningsråd 2020 http://dx.doi.org/10.1002/ece3.7025 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ece3.7025 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/ece3.7025 en eng Wiley http://creativecommons.org/licenses/by/4.0/ Ecology and Evolution volume 10, issue 24, page 14272-14281 ISSN 2045-7758 2045-7758 journal-article 2020 crwiley https://doi.org/10.1002/ece3.7025 2024-08-20T04:15:19Z Abstract 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‐2000s with divergent bottom temperature trends at subregional 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 subregions characterized by divergent temperature trends. We then tested whether food availability, as indexed by cod stomach fullness, played a role in cod expansion in subregions that were warming, cooling, or showed no trend. The greatest increase in cod occupancy occurred in three northern subregions 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 subregions 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. Article in Journal/Newspaper atlantic cod Barents Sea Climate change Gadus morhua Northeast Atlantic Wiley Online Library Ecology and Evolution 10 24 14272 14281 |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract 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‐2000s with divergent bottom temperature trends at subregional 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 subregions characterized by divergent temperature trends. We then tested whether food availability, as indexed by cod stomach fullness, played a role in cod expansion in subregions that were warming, cooling, or showed no trend. The greatest increase in cod occupancy occurred in three northern subregions 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 subregions 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. |
author2 |
Norges Forskningsråd |
format |
Article in Journal/Newspaper |
author |
Johannesen, Edda Yoccoz, Nigel G. Tveraa, Torkild Shackell, Nancy L. Ellingsen, Kari E. Dolgov, Andrey V. Frank, Kenneth T. |
spellingShingle |
Johannesen, Edda Yoccoz, Nigel G. Tveraa, Torkild Shackell, Nancy L. Ellingsen, Kari E. Dolgov, Andrey V. Frank, Kenneth T. Resource‐driven colonization by cod in a high Arctic food web |
author_facet |
Johannesen, Edda Yoccoz, Nigel G. Tveraa, Torkild Shackell, Nancy L. Ellingsen, Kari E. Dolgov, Andrey V. Frank, Kenneth T. |
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 |
publisher |
Wiley |
publishDate |
2020 |
url |
http://dx.doi.org/10.1002/ece3.7025 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ece3.7025 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/ece3.7025 |
genre |
atlantic cod Barents Sea Climate change Gadus morhua Northeast Atlantic |
genre_facet |
atlantic cod Barents Sea Climate change Gadus morhua Northeast Atlantic |
op_source |
Ecology and Evolution volume 10, issue 24, page 14272-14281 ISSN 2045-7758 2045-7758 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1002/ece3.7025 |
container_title |
Ecology and Evolution |
container_volume |
10 |
container_issue |
24 |
container_start_page |
14272 |
op_container_end_page |
14281 |
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1810431815837548544 |