Spatial and temporal changes in the Barents Sea pelagic compartment during the recent warming
The Barents Sea has experienced substantial warming over the last few decades with expansion of relatively warm Atlantic water and reduction in sea ice. Based on a review of relevant literature and additional analyses, we report changes in the pelagic compartment associated with this warming using d...
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Online Access: | https://hdl.handle.net/1956/15486 https://doi.org/10.1016/j.pocean.2016.12.009 |
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ftunivbergen:oai:bora.uib.no:1956/15486 2023-05-15T15:38:35+02:00 Spatial and temporal changes in the Barents Sea pelagic compartment during the recent warming Eriksen, Elena Skjoldal, Hein Rune Gjøsæter, Harald Primicerio, Raul 2017 application/pdf https://hdl.handle.net/1956/15486 https://doi.org/10.1016/j.pocean.2016.12.009 eng eng Elsevier Dynamics of the Barents Sea pelagic compartment: species distributions, interactions and response to climate variability urn:issn:0079-6611 https://hdl.handle.net/1956/15486 https://doi.org/10.1016/j.pocean.2016.12.009 Attribution CC BY http://creativecommons.org/licenses/by/4.0/ Progress in Oceanography 151 206-226 pelagic community krill 0-group fish pelagic fish spatial distribution warming Peer reviewed Journal article 2017 ftunivbergen https://doi.org/10.1016/j.pocean.2016.12.009 2023-03-14T17:44:03Z The Barents Sea has experienced substantial warming over the last few decades with expansion of relatively warm Atlantic water and reduction in sea ice. Based on a review of relevant literature and additional analyses, we report changes in the pelagic compartment associated with this warming using data from autumn surveys (acoustic capelin, 0-group fish, and ecosystem surveys). We estimated biomass for 25 components of the pelagic community, including macroplankton, 0-group fish, and juvenile and adult pelagic fish, were examined for spatial and temporal variation over the period 1993-2013. The estimated total biomass of the investigated pelagic compartment, not including mesozooplankton, ranged between about 6 and 30 million tonnes wet weight with an average of 17 million tonnes over the 21-years period. Krill was the dominant biomass component (63%), whereas pelagic fish (capelin, polar cod and herring) made up 26% and 0-group fish 11% of the biomass on average. The spatial distribution of biomass showed a broad-scale pattern reflecting differences in distribution of the main pelagic fishes (capelin in the north, polar cod in the east, and herring in the south) and transport of krill and 0-group fish with the Atlantic water flowing into the southern Barents Sea. Dividing the Barents Sea into six regions, the highest average biomass values were found in the Southwestern and South-Central subareas (about 4 million tonnes in each), with krill as the main component. Biomass was also high in the North-Central subarea (about 3 million tonnes) where capelin was the major contributor. The total estimated biomass of the pelagic compartment remained relatively stable during each of two main periods (before and after 2004), but increased by a factor of two from around 11 million tonnes in the first to around 23 million tonnes in the last period. The pronounced increase reflected the warming between the relatively cold 1990s and the warmer 2000s and was driven mainly by an increase in krill due presumably to increased ... Article in Journal/Newspaper Barents Sea Mesozooplankton polar cod Sea ice University of Bergen: Bergen Open Research Archive (BORA-UiB) Barents Sea Progress in Oceanography 151 206 226 |
institution |
Open Polar |
collection |
University of Bergen: Bergen Open Research Archive (BORA-UiB) |
op_collection_id |
ftunivbergen |
language |
English |
topic |
pelagic community krill 0-group fish pelagic fish spatial distribution warming |
spellingShingle |
pelagic community krill 0-group fish pelagic fish spatial distribution warming Eriksen, Elena Skjoldal, Hein Rune Gjøsæter, Harald Primicerio, Raul Spatial and temporal changes in the Barents Sea pelagic compartment during the recent warming |
topic_facet |
pelagic community krill 0-group fish pelagic fish spatial distribution warming |
description |
The Barents Sea has experienced substantial warming over the last few decades with expansion of relatively warm Atlantic water and reduction in sea ice. Based on a review of relevant literature and additional analyses, we report changes in the pelagic compartment associated with this warming using data from autumn surveys (acoustic capelin, 0-group fish, and ecosystem surveys). We estimated biomass for 25 components of the pelagic community, including macroplankton, 0-group fish, and juvenile and adult pelagic fish, were examined for spatial and temporal variation over the period 1993-2013. The estimated total biomass of the investigated pelagic compartment, not including mesozooplankton, ranged between about 6 and 30 million tonnes wet weight with an average of 17 million tonnes over the 21-years period. Krill was the dominant biomass component (63%), whereas pelagic fish (capelin, polar cod and herring) made up 26% and 0-group fish 11% of the biomass on average. The spatial distribution of biomass showed a broad-scale pattern reflecting differences in distribution of the main pelagic fishes (capelin in the north, polar cod in the east, and herring in the south) and transport of krill and 0-group fish with the Atlantic water flowing into the southern Barents Sea. Dividing the Barents Sea into six regions, the highest average biomass values were found in the Southwestern and South-Central subareas (about 4 million tonnes in each), with krill as the main component. Biomass was also high in the North-Central subarea (about 3 million tonnes) where capelin was the major contributor. The total estimated biomass of the pelagic compartment remained relatively stable during each of two main periods (before and after 2004), but increased by a factor of two from around 11 million tonnes in the first to around 23 million tonnes in the last period. The pronounced increase reflected the warming between the relatively cold 1990s and the warmer 2000s and was driven mainly by an increase in krill due presumably to increased ... |
format |
Article in Journal/Newspaper |
author |
Eriksen, Elena Skjoldal, Hein Rune Gjøsæter, Harald Primicerio, Raul |
author_facet |
Eriksen, Elena Skjoldal, Hein Rune Gjøsæter, Harald Primicerio, Raul |
author_sort |
Eriksen, Elena |
title |
Spatial and temporal changes in the Barents Sea pelagic compartment during the recent warming |
title_short |
Spatial and temporal changes in the Barents Sea pelagic compartment during the recent warming |
title_full |
Spatial and temporal changes in the Barents Sea pelagic compartment during the recent warming |
title_fullStr |
Spatial and temporal changes in the Barents Sea pelagic compartment during the recent warming |
title_full_unstemmed |
Spatial and temporal changes in the Barents Sea pelagic compartment during the recent warming |
title_sort |
spatial and temporal changes in the barents sea pelagic compartment during the recent warming |
publisher |
Elsevier |
publishDate |
2017 |
url |
https://hdl.handle.net/1956/15486 https://doi.org/10.1016/j.pocean.2016.12.009 |
geographic |
Barents Sea |
geographic_facet |
Barents Sea |
genre |
Barents Sea Mesozooplankton polar cod Sea ice |
genre_facet |
Barents Sea Mesozooplankton polar cod Sea ice |
op_source |
Progress in Oceanography 151 206-226 |
op_relation |
Dynamics of the Barents Sea pelagic compartment: species distributions, interactions and response to climate variability urn:issn:0079-6611 https://hdl.handle.net/1956/15486 https://doi.org/10.1016/j.pocean.2016.12.009 |
op_rights |
Attribution CC BY http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1016/j.pocean.2016.12.009 |
container_title |
Progress in Oceanography |
container_volume |
151 |
container_start_page |
206 |
op_container_end_page |
226 |
_version_ |
1766369636408885248 |