Changes in the size structure of marine fish communities
Marine ecosystems have been heavily impacted by fishing pressure, which can cause major changes in the structure of communities. Fishing directly removes biomass and causes secondary effects such as changing predatory and competitive interactions and altering energy pathways, all of which affect the...
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ftunivrhodeislan:oai:digitalcommons.uri.edu:gsofacpubs-1858 2023-10-09T21:54:02+02:00 Changes in the size structure of marine fish communities Bell, Richard J. Collie, Jeremy Branch, Trevor A. Fogarty, Michael J. Minto, Coilin Ricard, Daniel 2017-01-01T08:00:00Z application/pdf https://digitalcommons.uri.edu/gsofacpubs/890 https://doi.org/10.1093/icesjms/fsx118 https://digitalcommons.uri.edu/context/gsofacpubs/article/1858/viewcontent/Collie_J_ChangesInTheSize_2017.pdf unknown DigitalCommons@URI https://digitalcommons.uri.edu/gsofacpubs/890 doi:10.1093/icesjms/fsx118 https://digitalcommons.uri.edu/context/gsofacpubs/article/1858/viewcontent/Collie_J_ChangesInTheSize_2017.pdf http://creativecommons.org/publicdomain/zero/1.0/ Graduate School of Oceanography Faculty Publications text 2017 ftunivrhodeislan https://doi.org/10.1093/icesjms/fsx118 2023-09-11T18:07:44Z Marine ecosystems have been heavily impacted by fishing pressure, which can cause major changes in the structure of communities. Fishing directly removes biomass and causes secondary effects such as changing predatory and competitive interactions and altering energy pathways, all of which affect the functional groups and size distributions of marine ecosystems. We conducted a meta-analysis of eighteen trawl surveys from around the world to identify if there have been consistent changes in size-structure and life history groups across ecosystems. Declining biomass trends for larger fish and invertebrates were present in nine systems, all in the North Atlantic, while seven ecosystems did not exhibit consistent declining trends in larger organisms. Two systems had alternative patterns. Smaller taxa, across all ecosystems, had biomass trends with time that were typically flat or slightly increasing. Changes in the ratio of pelagic taxa to demersal taxa were variable across the surveys. Pelagic species were not uniformly increasing, but did show periods of increase in certain regions. In the western Atlantic, the pelagic-to-demersal ratio increased across a number of surveys in the 1990s and declined in the mid 2000s. The trawl survey data suggest there have been considerable structural changes over time and region, but the patterns are not consistent across all ecosystems. Text North Atlantic University of Rhode Island: DigitalCommons@URI ICES Journal of Marine Science 75 1 102 112 |
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University of Rhode Island: DigitalCommons@URI |
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ftunivrhodeislan |
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unknown |
description |
Marine ecosystems have been heavily impacted by fishing pressure, which can cause major changes in the structure of communities. Fishing directly removes biomass and causes secondary effects such as changing predatory and competitive interactions and altering energy pathways, all of which affect the functional groups and size distributions of marine ecosystems. We conducted a meta-analysis of eighteen trawl surveys from around the world to identify if there have been consistent changes in size-structure and life history groups across ecosystems. Declining biomass trends for larger fish and invertebrates were present in nine systems, all in the North Atlantic, while seven ecosystems did not exhibit consistent declining trends in larger organisms. Two systems had alternative patterns. Smaller taxa, across all ecosystems, had biomass trends with time that were typically flat or slightly increasing. Changes in the ratio of pelagic taxa to demersal taxa were variable across the surveys. Pelagic species were not uniformly increasing, but did show periods of increase in certain regions. In the western Atlantic, the pelagic-to-demersal ratio increased across a number of surveys in the 1990s and declined in the mid 2000s. The trawl survey data suggest there have been considerable structural changes over time and region, but the patterns are not consistent across all ecosystems. |
format |
Text |
author |
Bell, Richard J. Collie, Jeremy Branch, Trevor A. Fogarty, Michael J. Minto, Coilin Ricard, Daniel |
spellingShingle |
Bell, Richard J. Collie, Jeremy Branch, Trevor A. Fogarty, Michael J. Minto, Coilin Ricard, Daniel Changes in the size structure of marine fish communities |
author_facet |
Bell, Richard J. Collie, Jeremy Branch, Trevor A. Fogarty, Michael J. Minto, Coilin Ricard, Daniel |
author_sort |
Bell, Richard J. |
title |
Changes in the size structure of marine fish communities |
title_short |
Changes in the size structure of marine fish communities |
title_full |
Changes in the size structure of marine fish communities |
title_fullStr |
Changes in the size structure of marine fish communities |
title_full_unstemmed |
Changes in the size structure of marine fish communities |
title_sort |
changes in the size structure of marine fish communities |
publisher |
DigitalCommons@URI |
publishDate |
2017 |
url |
https://digitalcommons.uri.edu/gsofacpubs/890 https://doi.org/10.1093/icesjms/fsx118 https://digitalcommons.uri.edu/context/gsofacpubs/article/1858/viewcontent/Collie_J_ChangesInTheSize_2017.pdf |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Graduate School of Oceanography Faculty Publications |
op_relation |
https://digitalcommons.uri.edu/gsofacpubs/890 doi:10.1093/icesjms/fsx118 https://digitalcommons.uri.edu/context/gsofacpubs/article/1858/viewcontent/Collie_J_ChangesInTheSize_2017.pdf |
op_rights |
http://creativecommons.org/publicdomain/zero/1.0/ |
op_doi |
https://doi.org/10.1093/icesjms/fsx118 |
container_title |
ICES Journal of Marine Science |
container_volume |
75 |
container_issue |
1 |
container_start_page |
102 |
op_container_end_page |
112 |
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1779317451507367936 |