Data from: The role of a dominant predator in shaping biodiversity over space and time in a marine ecosystem
1. Exploitation of living marine resources has resulted in major changes to populations of targeted species and functional groups of large-bodied species in the ocean. However, the effects of overfishing and collapse of large top predators on the broad-scale biodiversity of oceanic ecosystems remain...
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ftdryad:oai:v1.datadryad.org:10255/dryad.87520 2023-05-15T15:27:43+02:00 Data from: The role of a dominant predator in shaping biodiversity over space and time in a marine ecosystem Ellingsen, Kari Elsa Anderson, Marti J. Shackell, Nancy L. Tveraa, Torkild Yoccoz, Nigel G. Frank, Kenneth T. Scotian Shelf Northwest Atlantic 2015-05-18T16:58:29Z http://hdl.handle.net/10255/dryad.87520 https://doi.org/10.5061/dryad.76sv3 unknown doi:10.5061/dryad.76sv3/1 doi:10.1111/1365-2656.12396 PMID:25981204 doi:10.5061/dryad.76sv3 Ellingsen KE, Anderson MJ, Shackell NL, Tveraa T, Yoccoz NG, Frank KT (2015) The role of a dominant predator in shaping biodiversity over space and time in a marine ecosystem. Journal of Animal Ecology 84(5): 1242–1252. http://hdl.handle.net/10255/dryad.87520 beta diversity causal model collapse of cod human impact marine fish path analysis relative abundance species composition top predator trophic cascade Article 2015 ftdryad https://doi.org/10.5061/dryad.76sv3 https://doi.org/10.5061/dryad.76sv3/1 https://doi.org/10.1111/1365-2656.12396 2020-01-01T15:19:57Z 1. Exploitation of living marine resources has resulted in major changes to populations of targeted species and functional groups of large-bodied species in the ocean. However, the effects of overfishing and collapse of large top predators on the broad-scale biodiversity of oceanic ecosystems remain largely unexplored. 2. Populations of the Atlantic cod (Gadus morhua) were overfished and several collapsed in the early 1990s across Atlantic Canada, providing a unique opportunity to study potential ecosystem-level effects of the reduction of a dominant predator on fish biodiversity, and to identify how such effects might interact with other environmental factors, such as changes in climate, over time. 3. We combined causal modelling with model selection and multimodel inference to analyse 41 years of fishery-independent survey data (1970–2010) and quantify ecosystem-level effects of overfishing and climate variation on the biodiversity of fishes across a broad area (172 000 km2) of the Scotian Shelf. 4. We found that alpha and beta diversity increased with decreases in cod occurrence; fish communities were less homogeneous and more variable in systems where cod no longer dominated. These effects were most pronounced in the colder north-eastern parts of the Scotian Shelf. 5. Our results provide strong evidence that intensive harvesting (and collapse) of marine apex predators can have large impacts on biodiversity, with far-reaching consequences for ecological stability across an entire ecosystem. Article in Journal/Newspaper atlantic cod Gadus morhua Northwest Atlantic Dryad Digital Repository (Duke University) Canada |
institution |
Open Polar |
collection |
Dryad Digital Repository (Duke University) |
op_collection_id |
ftdryad |
language |
unknown |
topic |
beta diversity causal model collapse of cod human impact marine fish path analysis relative abundance species composition top predator trophic cascade |
spellingShingle |
beta diversity causal model collapse of cod human impact marine fish path analysis relative abundance species composition top predator trophic cascade Ellingsen, Kari Elsa Anderson, Marti J. Shackell, Nancy L. Tveraa, Torkild Yoccoz, Nigel G. Frank, Kenneth T. Data from: The role of a dominant predator in shaping biodiversity over space and time in a marine ecosystem |
topic_facet |
beta diversity causal model collapse of cod human impact marine fish path analysis relative abundance species composition top predator trophic cascade |
description |
1. Exploitation of living marine resources has resulted in major changes to populations of targeted species and functional groups of large-bodied species in the ocean. However, the effects of overfishing and collapse of large top predators on the broad-scale biodiversity of oceanic ecosystems remain largely unexplored. 2. Populations of the Atlantic cod (Gadus morhua) were overfished and several collapsed in the early 1990s across Atlantic Canada, providing a unique opportunity to study potential ecosystem-level effects of the reduction of a dominant predator on fish biodiversity, and to identify how such effects might interact with other environmental factors, such as changes in climate, over time. 3. We combined causal modelling with model selection and multimodel inference to analyse 41 years of fishery-independent survey data (1970–2010) and quantify ecosystem-level effects of overfishing and climate variation on the biodiversity of fishes across a broad area (172 000 km2) of the Scotian Shelf. 4. We found that alpha and beta diversity increased with decreases in cod occurrence; fish communities were less homogeneous and more variable in systems where cod no longer dominated. These effects were most pronounced in the colder north-eastern parts of the Scotian Shelf. 5. Our results provide strong evidence that intensive harvesting (and collapse) of marine apex predators can have large impacts on biodiversity, with far-reaching consequences for ecological stability across an entire ecosystem. |
format |
Article in Journal/Newspaper |
author |
Ellingsen, Kari Elsa Anderson, Marti J. Shackell, Nancy L. Tveraa, Torkild Yoccoz, Nigel G. Frank, Kenneth T. |
author_facet |
Ellingsen, Kari Elsa Anderson, Marti J. Shackell, Nancy L. Tveraa, Torkild Yoccoz, Nigel G. Frank, Kenneth T. |
author_sort |
Ellingsen, Kari Elsa |
title |
Data from: The role of a dominant predator in shaping biodiversity over space and time in a marine ecosystem |
title_short |
Data from: The role of a dominant predator in shaping biodiversity over space and time in a marine ecosystem |
title_full |
Data from: The role of a dominant predator in shaping biodiversity over space and time in a marine ecosystem |
title_fullStr |
Data from: The role of a dominant predator in shaping biodiversity over space and time in a marine ecosystem |
title_full_unstemmed |
Data from: The role of a dominant predator in shaping biodiversity over space and time in a marine ecosystem |
title_sort |
data from: the role of a dominant predator in shaping biodiversity over space and time in a marine ecosystem |
publishDate |
2015 |
url |
http://hdl.handle.net/10255/dryad.87520 https://doi.org/10.5061/dryad.76sv3 |
op_coverage |
Scotian Shelf Northwest Atlantic |
geographic |
Canada |
geographic_facet |
Canada |
genre |
atlantic cod Gadus morhua Northwest Atlantic |
genre_facet |
atlantic cod Gadus morhua Northwest Atlantic |
op_relation |
doi:10.5061/dryad.76sv3/1 doi:10.1111/1365-2656.12396 PMID:25981204 doi:10.5061/dryad.76sv3 Ellingsen KE, Anderson MJ, Shackell NL, Tveraa T, Yoccoz NG, Frank KT (2015) The role of a dominant predator in shaping biodiversity over space and time in a marine ecosystem. Journal of Animal Ecology 84(5): 1242–1252. http://hdl.handle.net/10255/dryad.87520 |
op_doi |
https://doi.org/10.5061/dryad.76sv3 https://doi.org/10.5061/dryad.76sv3/1 https://doi.org/10.1111/1365-2656.12396 |
_version_ |
1766358139562622976 |