Resource‐driven colonization by cod in a high Arctic food web
1. Climate change is commonly associated with many species redistributions and the influence of other factors may be marginalized, especially in the rapidly warming Arctic. 2. The Barents Sea, a high latitude large marine ecosystem in the Northeast Atlantic has experienced above-average temperatures...
Published in: | Ecology and Evolution |
---|---|
Main Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2020
|
Subjects: | |
Online Access: | https://hdl.handle.net/11250/2719605 https://doi.org/10.1002/ece3.7025 |
id |
ftimr:oai:imr.brage.unit.no:11250/2719605 |
---|---|
record_format |
openpolar |
spelling |
ftimr:oai:imr.brage.unit.no:11250/2719605 2023-05-15T14:59:52+02:00 Resource‐driven colonization by cod in a high Arctic food web Johannesen, Edda Yoccoz, Nigel Tveraa, Torkild Schackell, Nancy L. Ellingsen, Kari Dolgov, Andrey V. Frank, Kenneth T. 2020 application/pdf https://hdl.handle.net/11250/2719605 https://doi.org/10.1002/ece3.7025 eng eng Norges forskningsråd: 234359 urn:issn:2045-7758 https://hdl.handle.net/11250/2719605 https://doi.org/10.1002/ece3.7025 cristin:1852715 Ecology and Evolution VDP::Zoologiske og botaniske fag: 480 VDP::Zoology and botany: 480 Peer reviewed Journal article 2020 ftimr https://doi.org/10.1002/ece3.7025 2021-09-23T20:14:54Z 1. Climate change is commonly associated with many species redistributions and the influence of other factors may be marginalized, especially in the rapidly warming Arctic. 2. 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. 3. 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. 4. 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. 5. 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. 6. 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. abiotic, Barents Sea, biotic, hierarchical design, marine food webs, range expansion, spatial distribution, stomach data publishedVersion Article in Journal/Newspaper Arctic atlantic cod Barents Sea Climate change Gadus morhua Northeast Atlantic Institute for Marine Research: Brage IMR Arctic Barents Sea Ecology and Evolution 10 24 14272 14281 |
institution |
Open Polar |
collection |
Institute for Marine Research: Brage IMR |
op_collection_id |
ftimr |
language |
English |
topic |
VDP::Zoologiske og botaniske fag: 480 VDP::Zoology and botany: 480 |
spellingShingle |
VDP::Zoologiske og botaniske fag: 480 VDP::Zoology and botany: 480 Johannesen, Edda Yoccoz, Nigel Tveraa, Torkild Schackell, Nancy L. Ellingsen, Kari Dolgov, Andrey V. Frank, Kenneth T. Resource‐driven colonization by cod in a high Arctic food web |
topic_facet |
VDP::Zoologiske og botaniske fag: 480 VDP::Zoology and botany: 480 |
description |
1. Climate change is commonly associated with many species redistributions and the influence of other factors may be marginalized, especially in the rapidly warming Arctic. 2. 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. 3. 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. 4. 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. 5. 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. 6. 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. abiotic, Barents Sea, biotic, hierarchical design, marine food webs, range expansion, spatial distribution, stomach data publishedVersion |
format |
Article in Journal/Newspaper |
author |
Johannesen, Edda Yoccoz, Nigel Tveraa, Torkild Schackell, Nancy L. Ellingsen, Kari Dolgov, Andrey V. Frank, Kenneth T. |
author_facet |
Johannesen, Edda Yoccoz, Nigel Tveraa, Torkild Schackell, Nancy L. Ellingsen, Kari 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 |
publishDate |
2020 |
url |
https://hdl.handle.net/11250/2719605 https://doi.org/10.1002/ece3.7025 |
geographic |
Arctic Barents Sea |
geographic_facet |
Arctic Barents Sea |
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_source |
Ecology and Evolution |
op_relation |
Norges forskningsråd: 234359 urn:issn:2045-7758 https://hdl.handle.net/11250/2719605 https://doi.org/10.1002/ece3.7025 cristin:1852715 |
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 |
_version_ |
1766331988820623360 |