Climate warming is predicted to enhance the negative effects of size-selective harvesting on 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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Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley
2019
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Subjects: | |
Online Access: | https://hdl.handle.net/10037/16997 https://doi.org/10.1111/1365-2664.13535 |
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Open Polar |
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University of Tromsø: Munin Open Research Archive |
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English |
topic |
VDP::Mathematics and natural science: 400::Zoology and botany: 480::Ecology: 488 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Økologi: 488 VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Resource biology: 921 VDP::Landbruks- og Fiskerifag: 900::Fiskerifag: 920::Ressursbiologi: 921 |
spellingShingle |
VDP::Mathematics and natural science: 400::Zoology and botany: 480::Ecology: 488 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Økologi: 488 VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Resource biology: 921 VDP::Landbruks- og Fiskerifag: 900::Fiskerifag: 920::Ressursbiologi: 921 Smalås, Aslak Strøm, John Fredrik Amundsen, Per-Arne Dieckmann, Ulf Primicerio, Raul Climate warming is predicted to enhance the negative effects of size-selective harvesting on lake fish |
topic_facet |
VDP::Mathematics and natural science: 400::Zoology and botany: 480::Ecology: 488 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Økologi: 488 VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Resource biology: 921 VDP::Landbruks- og Fiskerifag: 900::Fiskerifag: 920::Ressursbiologi: 921 |
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 vulnerability of the population to environmental perturbations. Synthesis and applications . Our model‐based analyses highlight the combined effects of climate change and size‐selective fishing, emphasizing the emerging vulnerability of fish populations to multiple stressors. We recommend carefully climate‐adapted management strategies permitting only a narrow range of gillnet mesh sizes for inland fisheries at high latitudes. |
format |
Article in Journal/Newspaper |
author |
Smalås, Aslak Strøm, John Fredrik Amundsen, Per-Arne Dieckmann, Ulf Primicerio, Raul |
author_facet |
Smalås, Aslak Strøm, John Fredrik Amundsen, Per-Arne Dieckmann, Ulf Primicerio, Raul |
author_sort |
Smalås, Aslak |
title |
Climate warming is predicted to enhance the negative effects of size-selective harvesting on lake fish |
title_short |
Climate warming is predicted to enhance the negative effects of size-selective harvesting on lake fish |
title_full |
Climate warming is predicted to enhance the negative effects of size-selective harvesting on lake fish |
title_fullStr |
Climate warming is predicted to enhance the negative effects of size-selective harvesting on lake fish |
title_full_unstemmed |
Climate warming is predicted to enhance the negative effects of size-selective harvesting on lake fish |
title_sort |
climate warming is predicted to enhance the negative effects of size-selective harvesting on lake fish |
publisher |
Wiley |
publishDate |
2019 |
url |
https://hdl.handle.net/10037/16997 https://doi.org/10.1111/1365-2664.13535 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic charr Arctic Climate change Salvelinus alpinus |
genre_facet |
Arctic charr Arctic Climate change Salvelinus alpinus |
op_relation |
Journal of Applied Ecology info:eu-repo/grantAgreement/EC/H2020/677039/EU/Co-creating a decision support framework to ensure sustainable fish production in Europe under climate change/ClimeFish/ info:eu-repo/grantAgreement/EC/H2020/820989/EU/Our common future ocean in the Earth system – quantifying coupled cycles of carbon, oxygen, and nutrients for determining and achieving safe operating spaces with respect to tipping points/COMFORT/ Smalås A, Strøm JF, Amundsen P-A, Dieckmann U, Primicerio R. Climate warming is predicted to enhance the negative effects of size-selective harvesting on lake fish. Journal of Applied Ecology. 2019 FRIDAID 1759838 https://doi.org/10.1111/1365-2664.13535 0021-8901 1365-2664 https://hdl.handle.net/10037/16997 |
op_rights |
Attribution 4.0 International openAccess Copyright 2019 The Author(s) http://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
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_ |
1766304062565777408 |
spelling |
ftunivtroemsoe:oai:munin.uit.no:10037/16997 2023-05-15T14:30:09+02:00 Climate warming is predicted to enhance the negative effects of size-selective harvesting on lake fish Smalås, Aslak Strøm, John Fredrik Amundsen, Per-Arne Dieckmann, Ulf Primicerio, Raul 2019-11-05 https://hdl.handle.net/10037/16997 https://doi.org/10.1111/1365-2664.13535 eng eng Wiley Journal of Applied Ecology info:eu-repo/grantAgreement/EC/H2020/677039/EU/Co-creating a decision support framework to ensure sustainable fish production in Europe under climate change/ClimeFish/ info:eu-repo/grantAgreement/EC/H2020/820989/EU/Our common future ocean in the Earth system – quantifying coupled cycles of carbon, oxygen, and nutrients for determining and achieving safe operating spaces with respect to tipping points/COMFORT/ Smalås A, Strøm JF, Amundsen P-A, Dieckmann U, Primicerio R. Climate warming is predicted to enhance the negative effects of size-selective harvesting on lake fish. Journal of Applied Ecology. 2019 FRIDAID 1759838 https://doi.org/10.1111/1365-2664.13535 0021-8901 1365-2664 https://hdl.handle.net/10037/16997 Attribution 4.0 International openAccess Copyright 2019 The Author(s) http://creativecommons.org/licenses/by/4.0/ CC-BY VDP::Mathematics and natural science: 400::Zoology and botany: 480::Ecology: 488 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Økologi: 488 VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Resource biology: 921 VDP::Landbruks- og Fiskerifag: 900::Fiskerifag: 920::Ressursbiologi: 921 Journal article Tidsskriftartikkel Peer reviewed publishedVersion 2019 ftunivtroemsoe https://doi.org/10.1111/1365-2664.13535 2021-06-25T17:57:01Z 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 vulnerability of the population to environmental perturbations. Synthesis and applications . Our model‐based analyses highlight the combined effects of climate change and size‐selective fishing, emphasizing the emerging vulnerability of fish populations to multiple stressors. We recommend carefully climate‐adapted management strategies permitting only a narrow range of gillnet mesh sizes for inland fisheries at high latitudes. Article in Journal/Newspaper Arctic charr Arctic Climate change Salvelinus alpinus University of Tromsø: Munin Open Research Archive Arctic Journal of Applied Ecology 57 2 270 282 |