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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fttriple:oai:gotriple.eu:50|dedup_wf_001::b01226e2724bf967396a7a1482dbaf15 2023-05-15T15:27:51+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. Ellingsen, Kari E. 2016-05-12 https://doi.org/10.5061/dryad.76sv3 undefined unknown http://dx.doi.org/10.5061/dryad.76sv3 https://dx.doi.org/10.5061/dryad.76sv3 lic_creative-commons oai:services.nod.dans.knaw.nl:Products/dans:oai:easy.dans.knaw.nl:easy-dataset:89470 10.5061/dryad.76sv3 oai:easy.dans.knaw.nl:easy-dataset:89470 10|eurocrisdris::fe4903425d9040f680d8610d9079ea14 10|openaire____::9e3be59865b2c1c335d32dae2fe7b254 10|re3data_____::94816e6421eeb072e7742ce6a9decc5f re3data_____::r3d100000044 10|re3data_____::84e123776089ce3c7a33db98d9cd15a8 10|openaire____::081b82f96300b6a6e3d282bad31cb6e2 10|opendoar____::8b6dd7db9af49e67306feb59a8bdc52c Life sciences medicine and health care beta diversity path analysis Human impact top predator trophic cascade causal model collapse of cod relative abundance species composition Gadus morhua marine fish Scotian Shelf Northwest Atlantic envir geo Dataset https://vocabularies.coar-repositories.org/resource_types/c_ddb1/ 2016 fttriple https://doi.org/10.5061/dryad.76sv3 2023-01-22T17:22:56Z 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. ELLINGSEN - Role of cod in shaping beta diversityData consisted of all commercial and non-commercial fish species sampled by the DFO annual summer (July) research bottom trawl surveys of the Scotian Shelf, Northwest Atlantic over a period of 41 years (1970-2010). The data were extracted from the Ocean Biogeographic Information System (OBIS) database. All analyses were done using R.ELLINGSEN - Role of cod in shaping beta-diversity.csv Dataset atlantic cod Gadus morhua Northwest Atlantic Unknown Canada |
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Open Polar |
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fttriple |
language |
unknown |
topic |
Life sciences medicine and health care beta diversity path analysis Human impact top predator trophic cascade causal model collapse of cod relative abundance species composition Gadus morhua marine fish Scotian Shelf Northwest Atlantic envir geo |
spellingShingle |
Life sciences medicine and health care beta diversity path analysis Human impact top predator trophic cascade causal model collapse of cod relative abundance species composition Gadus morhua marine fish Scotian Shelf Northwest Atlantic envir geo Ellingsen, Kari Elsa Anderson, Marti J. Shackell, Nancy L. Tveraa, Torkild Yoccoz, Nigel G. Frank, Kenneth T. Ellingsen, Kari E. Data from: The role of a dominant predator in shaping biodiversity over space and time in a marine ecosystem |
topic_facet |
Life sciences medicine and health care beta diversity path analysis Human impact top predator trophic cascade causal model collapse of cod relative abundance species composition Gadus morhua marine fish Scotian Shelf Northwest Atlantic envir geo |
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. ELLINGSEN - Role of cod in shaping beta diversityData consisted of all commercial and non-commercial fish species sampled by the DFO annual summer (July) research bottom trawl surveys of the Scotian Shelf, Northwest Atlantic over a period of 41 years (1970-2010). The data were extracted from the Ocean Biogeographic Information System (OBIS) database. All analyses were done using R.ELLINGSEN - Role of cod in shaping beta-diversity.csv |
format |
Dataset |
author |
Ellingsen, Kari Elsa Anderson, Marti J. Shackell, Nancy L. Tveraa, Torkild Yoccoz, Nigel G. Frank, Kenneth T. Ellingsen, Kari E. |
author_facet |
Ellingsen, Kari Elsa Anderson, Marti J. Shackell, Nancy L. Tveraa, Torkild Yoccoz, Nigel G. Frank, Kenneth T. Ellingsen, Kari E. |
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 |
2016 |
url |
https://doi.org/10.5061/dryad.76sv3 |
geographic |
Canada |
geographic_facet |
Canada |
genre |
atlantic cod Gadus morhua Northwest Atlantic |
genre_facet |
atlantic cod Gadus morhua Northwest Atlantic |
op_source |
oai:services.nod.dans.knaw.nl:Products/dans:oai:easy.dans.knaw.nl:easy-dataset:89470 10.5061/dryad.76sv3 oai:easy.dans.knaw.nl:easy-dataset:89470 10|eurocrisdris::fe4903425d9040f680d8610d9079ea14 10|openaire____::9e3be59865b2c1c335d32dae2fe7b254 10|re3data_____::94816e6421eeb072e7742ce6a9decc5f re3data_____::r3d100000044 10|re3data_____::84e123776089ce3c7a33db98d9cd15a8 10|openaire____::081b82f96300b6a6e3d282bad31cb6e2 10|opendoar____::8b6dd7db9af49e67306feb59a8bdc52c |
op_relation |
http://dx.doi.org/10.5061/dryad.76sv3 https://dx.doi.org/10.5061/dryad.76sv3 |
op_rights |
lic_creative-commons |
op_doi |
https://doi.org/10.5061/dryad.76sv3 |
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1766358256770351104 |