Climate warming is predicted to enhance the negative effects of harvesting on high‐latitude lake fish
Ecosystems at high latitudes are exposed to some of the highest rates of climate warming on earth, and freshwater ecosystems in those regions are already experiencing extended ice-free seasons and warmer waters. The dominant fish species in these ecosystems are cold-water salmonids, which play a cen...
Published in: | Journal of Applied Ecology |
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Language: | English |
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Online Access: | https://pure.iiasa.ac.at/id/eprint/16246/ https://pure.iiasa.ac.at/id/eprint/16246/1/1365-2664.13535.pdf https://doi.org/10.1111/1365-2664.13535 |
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ftiiasalaxenburg:oai:pure.iiasa.ac.at:16246 2023-05-15T14:30:08+02:00 Climate warming is predicted to enhance the negative effects of harvesting on high‐latitude lake fish Smalås, A. Strøm, J.F. Amundsen, P.‐A. Dieckmann, U. Primicerio, R. 2020-02 text https://pure.iiasa.ac.at/id/eprint/16246/ https://pure.iiasa.ac.at/id/eprint/16246/1/1365-2664.13535.pdf https://doi.org/10.1111/1365-2664.13535 en eng Wiley https://pure.iiasa.ac.at/id/eprint/16246/1/1365-2664.13535.pdf Smalås, A., Strøm, J.F., Amundsen, P.‐A., Dieckmann, U. <https://pure.iiasa.ac.at/view/iiasa/66.html> orcid:0000-0001-7089-0393 , & Primicerio, R. (2020). Climate warming is predicted to enhance the negative effects of harvesting on high‐latitude lake fish. Journal of Applied Ecology 57 (2) 270-282. 10.1111/1365-2664.13535 <https://doi.org/10.1111/1365-2664.13535>. doi:10.1111/1365-2664.13535 cc_by_4 info:eu-repo/semantics/openAccess Article PeerReviewed info:eu-repo/semantics/article 2020 ftiiasalaxenburg https://doi.org/10.1111/1365-2664.13535 2023-04-07T14:53:54Z Ecosystems at high latitudes are exposed to some of the highest rates of climate warming on earth, and freshwater ecosystems in those regions are already experiencing extended ice-free seasons and warmer waters. The dominant fish species in these ecosystems are cold-water salmonids, which play a central ecological role in lake ecosystems, where they are often exposed to size-selective fisheries that truncate their size and age distributions, making them potentially vulnerable to exploitation and environmental perturbations. Here, we address the combined effects of climate-induced water temperature increase (using regionally downscaled climate models based on the RCP-4.5 and RCP-8.5 climate scenarios together with an air-to-water temperature model) and gillnet harvesting, over the period from 1950 to 2100, on the somatic growth, demography and vulnerability of Arctic charr Salvelinus alpinus (L.), using an eco-genetic individual-based model. The model captures successive annual life-history events, including the key processes of size-dependent mortality, age- and size-dependent maturation described by a probabilistic reaction norm, temperature-dependent growth, size-dependent reproduction and density-dependent recruitment. Our model predicts that higher water temperatures will increase the somatic growth of Arctic charr, leading to larger body size at age and increased stock biomass: for RCP-8.5, we predict an 80% increase in stock biomass in the year 2100 relative to the year 2000 in the absence of fishing. Interestingly, this potential increase in biomass in future climate scenarios will be partially masked by harvesting: for a fishing mortality of 0.3 year−1, we predict a mere 40% increase in stock biomass in 2100 relative to 2000. Despite the predicted increase in stock biomass, yield will increase substantially only when fishing mortality is low. In addition, climate warming will accentuate the age-truncation effect of harvesting, which will target younger individuals, including immatures, thus elevating the ... Article in Journal/Newspaper Arctic charr Arctic Salvelinus alpinus IIASA PURE (International Institute of Applied Systems Analysis: PUblications REpository) Arctic Journal of Applied Ecology 57 2 270 282 |
institution |
Open Polar |
collection |
IIASA PURE (International Institute of Applied Systems Analysis: PUblications REpository) |
op_collection_id |
ftiiasalaxenburg |
language |
English |
description |
Ecosystems at high latitudes are exposed to some of the highest rates of climate warming on earth, and freshwater ecosystems in those regions are already experiencing extended ice-free seasons and warmer waters. The dominant fish species in these ecosystems are cold-water salmonids, which play a central ecological role in lake ecosystems, where they are often exposed to size-selective fisheries that truncate their size and age distributions, making them potentially vulnerable to exploitation and environmental perturbations. Here, we address the combined effects of climate-induced water temperature increase (using regionally downscaled climate models based on the RCP-4.5 and RCP-8.5 climate scenarios together with an air-to-water temperature model) and gillnet harvesting, over the period from 1950 to 2100, on the somatic growth, demography and vulnerability of Arctic charr Salvelinus alpinus (L.), using an eco-genetic individual-based model. The model captures successive annual life-history events, including the key processes of size-dependent mortality, age- and size-dependent maturation described by a probabilistic reaction norm, temperature-dependent growth, size-dependent reproduction and density-dependent recruitment. Our model predicts that higher water temperatures will increase the somatic growth of Arctic charr, leading to larger body size at age and increased stock biomass: for RCP-8.5, we predict an 80% increase in stock biomass in the year 2100 relative to the year 2000 in the absence of fishing. Interestingly, this potential increase in biomass in future climate scenarios will be partially masked by harvesting: for a fishing mortality of 0.3 year−1, we predict a mere 40% increase in stock biomass in 2100 relative to 2000. Despite the predicted increase in stock biomass, yield will increase substantially only when fishing mortality is low. In addition, climate warming will accentuate the age-truncation effect of harvesting, which will target younger individuals, including immatures, thus elevating the ... |
format |
Article in Journal/Newspaper |
author |
Smalås, A. Strøm, J.F. Amundsen, P.‐A. Dieckmann, U. Primicerio, R. |
spellingShingle |
Smalås, A. Strøm, J.F. Amundsen, P.‐A. Dieckmann, U. Primicerio, R. Climate warming is predicted to enhance the negative effects of harvesting on high‐latitude lake fish |
author_facet |
Smalås, A. Strøm, J.F. Amundsen, P.‐A. Dieckmann, U. Primicerio, R. |
author_sort |
Smalås, A. |
title |
Climate warming is predicted to enhance the negative effects of harvesting on high‐latitude lake fish |
title_short |
Climate warming is predicted to enhance the negative effects of harvesting on high‐latitude lake fish |
title_full |
Climate warming is predicted to enhance the negative effects of harvesting on high‐latitude lake fish |
title_fullStr |
Climate warming is predicted to enhance the negative effects of harvesting on high‐latitude lake fish |
title_full_unstemmed |
Climate warming is predicted to enhance the negative effects of harvesting on high‐latitude lake fish |
title_sort |
climate warming is predicted to enhance the negative effects of harvesting on high‐latitude lake fish |
publisher |
Wiley |
publishDate |
2020 |
url |
https://pure.iiasa.ac.at/id/eprint/16246/ https://pure.iiasa.ac.at/id/eprint/16246/1/1365-2664.13535.pdf https://doi.org/10.1111/1365-2664.13535 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic charr Arctic Salvelinus alpinus |
genre_facet |
Arctic charr Arctic Salvelinus alpinus |
op_relation |
https://pure.iiasa.ac.at/id/eprint/16246/1/1365-2664.13535.pdf Smalås, A., Strøm, J.F., Amundsen, P.‐A., Dieckmann, U. <https://pure.iiasa.ac.at/view/iiasa/66.html> orcid:0000-0001-7089-0393 , & Primicerio, R. (2020). Climate warming is predicted to enhance the negative effects of harvesting on high‐latitude lake fish. Journal of Applied Ecology 57 (2) 270-282. 10.1111/1365-2664.13535 <https://doi.org/10.1111/1365-2664.13535>. doi:10.1111/1365-2664.13535 |
op_rights |
cc_by_4 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1111/1365-2664.13535 |
container_title |
Journal of Applied Ecology |
container_volume |
57 |
container_issue |
2 |
container_start_page |
270 |
op_container_end_page |
282 |
_version_ |
1766304041552314368 |