Change in Fish Community Structure in the Barents Sea
Change in oceanographic conditions causes structural alterations in marine fish communities, but this effect may go undetected as most monitoring programs until recently mainly have focused on oceanography and commercial species rather than on whole ecosystems. In this paper, the objective is to des...
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ftpubmed:oai:pubmedcentral.nih.gov:3639171 2023-05-15T15:38:34+02:00 Change in Fish Community Structure in the Barents Sea Aschan, Michaela Fossheim, Maria Greenacre, Michael Primicerio, Raul 2013-04-29 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3639171 http://www.ncbi.nlm.nih.gov/pubmed/23658646 https://doi.org/10.1371/journal.pone.0062748 en eng Public Library of Science http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3639171 http://www.ncbi.nlm.nih.gov/pubmed/23658646 http://dx.doi.org/10.1371/journal.pone.0062748 This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. CC-BY Research Article Text 2013 ftpubmed https://doi.org/10.1371/journal.pone.0062748 2013-09-04T23:04:07Z Change in oceanographic conditions causes structural alterations in marine fish communities, but this effect may go undetected as most monitoring programs until recently mainly have focused on oceanography and commercial species rather than on whole ecosystems. In this paper, the objective is to describe the spatial and temporal changes in the Barents Sea fish community in the period 1992–2004 while taking into consideration the observed abundance and biodiversity patterns for all 82 observed fish species. We found that the spatial structure of the Barents Sea fish community was determined by abiotic factors such as temperature and depth. The observed species clustered into a deep assemblage, a warm water southern assemblage, both associated with Atlantic water, and a cold water north-eastern assemblage associated with mixed water. The latitude of the cold water NE and warm water S assemblages varied from year to year, but no obvious northward migration was observed over time. In the period 1996–1999 we observed a significant reduction in total fish biomass, abundance, mean fish weight, and a change in community structure including an increase in the pelagic/demersal ratio. This change in community structure is probably due to extremely cold conditions in 1996 impacting on a fish community exposed to historically high fishing rates. After 1999 the fish community variables such as biomass, abundance, mean weight, P/D ratio as well as community composition did not return to levels of the early 90s, although fishing pressure and climatic conditions returned to earlier levels. Text Barents Sea PubMed Central (PMC) Barents Sea PLoS ONE 8 4 e62748 |
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Research Article Aschan, Michaela Fossheim, Maria Greenacre, Michael Primicerio, Raul Change in Fish Community Structure in the Barents Sea |
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Research Article |
description |
Change in oceanographic conditions causes structural alterations in marine fish communities, but this effect may go undetected as most monitoring programs until recently mainly have focused on oceanography and commercial species rather than on whole ecosystems. In this paper, the objective is to describe the spatial and temporal changes in the Barents Sea fish community in the period 1992–2004 while taking into consideration the observed abundance and biodiversity patterns for all 82 observed fish species. We found that the spatial structure of the Barents Sea fish community was determined by abiotic factors such as temperature and depth. The observed species clustered into a deep assemblage, a warm water southern assemblage, both associated with Atlantic water, and a cold water north-eastern assemblage associated with mixed water. The latitude of the cold water NE and warm water S assemblages varied from year to year, but no obvious northward migration was observed over time. In the period 1996–1999 we observed a significant reduction in total fish biomass, abundance, mean fish weight, and a change in community structure including an increase in the pelagic/demersal ratio. This change in community structure is probably due to extremely cold conditions in 1996 impacting on a fish community exposed to historically high fishing rates. After 1999 the fish community variables such as biomass, abundance, mean weight, P/D ratio as well as community composition did not return to levels of the early 90s, although fishing pressure and climatic conditions returned to earlier levels. |
format |
Text |
author |
Aschan, Michaela Fossheim, Maria Greenacre, Michael Primicerio, Raul |
author_facet |
Aschan, Michaela Fossheim, Maria Greenacre, Michael Primicerio, Raul |
author_sort |
Aschan, Michaela |
title |
Change in Fish Community Structure in the Barents Sea |
title_short |
Change in Fish Community Structure in the Barents Sea |
title_full |
Change in Fish Community Structure in the Barents Sea |
title_fullStr |
Change in Fish Community Structure in the Barents Sea |
title_full_unstemmed |
Change in Fish Community Structure in the Barents Sea |
title_sort |
change in fish community structure in the barents sea |
publisher |
Public Library of Science |
publishDate |
2013 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3639171 http://www.ncbi.nlm.nih.gov/pubmed/23658646 https://doi.org/10.1371/journal.pone.0062748 |
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Barents Sea |
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Barents Sea |
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Barents Sea |
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Barents Sea |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3639171 http://www.ncbi.nlm.nih.gov/pubmed/23658646 http://dx.doi.org/10.1371/journal.pone.0062748 |
op_rights |
This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. |
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CC-BY |
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https://doi.org/10.1371/journal.pone.0062748 |
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