Multigenerational exposure to elevated temperatures leads to a reduction in standard metabolic rate in the wild
Abstract In light of global climate change, there is a pressing need to understand and predict the capacity of populations to respond to rising temperatures. Metabolic rate is a key trait that is likely to influence the ability to cope with climate change. Yet, empirical and theoretical work on meta...
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Online Access: | http://dx.doi.org/10.1111/1365-2435.13538 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2F1365-2435.13538 https://onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2435.13538 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/1365-2435.13538 https://besjournals.onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2435.13538 |
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crwiley:10.1111/1365-2435.13538 2024-09-15T18:14:23+00:00 Multigenerational exposure to elevated temperatures leads to a reduction in standard metabolic rate in the wild Pilakouta, Natalie Killen, Shaun S. Kristjánsson, Bjarni K. Skúlason, Skúli Lindström, Jan Metcalfe, Neil B. Parsons, Kevin J. White, Craig Natural Environment Research Council H2020 European Research Council 2020 http://dx.doi.org/10.1111/1365-2435.13538 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2F1365-2435.13538 https://onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2435.13538 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/1365-2435.13538 https://besjournals.onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2435.13538 en eng Wiley http://creativecommons.org/licenses/by/4.0/ Functional Ecology volume 34, issue 6, page 1205-1214 ISSN 0269-8463 1365-2435 journal-article 2020 crwiley https://doi.org/10.1111/1365-2435.13538 2024-08-27T04:26:57Z Abstract In light of global climate change, there is a pressing need to understand and predict the capacity of populations to respond to rising temperatures. Metabolic rate is a key trait that is likely to influence the ability to cope with climate change. Yet, empirical and theoretical work on metabolic rate responses to temperature changes has so far produced mixed results and conflicting predictions. Our study addresses this issue using a novel approach of comparing fish populations in geothermally warmed lakes and adjacent ambient‐temperature lakes in Iceland. This unique ‘natural experiment’ provides repeated and independent examples of populations experiencing contrasting thermal environments for many generations over a small geographic scale, thereby avoiding the confounding factors associated with latitudinal or elevational comparisons. Using Icelandic sticklebacks from three warm and three cold habitats, we measured individual metabolic rates across a range of acclimation temperatures to obtain reaction norms for each population. We found a general pattern for a lower standard metabolic rate (SMR) in sticklebacks from warm habitats when measured at a common temperature, as predicted by Krogh's rule. Metabolic rate differences between warm‐ and cold‐habitat sticklebacks were more pronounced at more extreme acclimation temperatures, suggesting the release of cryptic genetic variation upon exposure to novel conditions, which can reveal hidden evolutionary potential. We also found a stronger divergence in metabolic rate between thermal habitats in allopatry than sympatry, indicating that gene flow may constrain physiological adaptation when dispersal between warm and cold habitats is possible. In sum, our study suggests that fish may diverge toward a lower SMR in a warming world, but this might depend on connectivity and gene flow between different thermal habitats. A free Plain Language Summary can be found within the Supporting Information of this article. Article in Journal/Newspaper Iceland Wiley Online Library Functional Ecology 34 6 1205 1214 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract In light of global climate change, there is a pressing need to understand and predict the capacity of populations to respond to rising temperatures. Metabolic rate is a key trait that is likely to influence the ability to cope with climate change. Yet, empirical and theoretical work on metabolic rate responses to temperature changes has so far produced mixed results and conflicting predictions. Our study addresses this issue using a novel approach of comparing fish populations in geothermally warmed lakes and adjacent ambient‐temperature lakes in Iceland. This unique ‘natural experiment’ provides repeated and independent examples of populations experiencing contrasting thermal environments for many generations over a small geographic scale, thereby avoiding the confounding factors associated with latitudinal or elevational comparisons. Using Icelandic sticklebacks from three warm and three cold habitats, we measured individual metabolic rates across a range of acclimation temperatures to obtain reaction norms for each population. We found a general pattern for a lower standard metabolic rate (SMR) in sticklebacks from warm habitats when measured at a common temperature, as predicted by Krogh's rule. Metabolic rate differences between warm‐ and cold‐habitat sticklebacks were more pronounced at more extreme acclimation temperatures, suggesting the release of cryptic genetic variation upon exposure to novel conditions, which can reveal hidden evolutionary potential. We also found a stronger divergence in metabolic rate between thermal habitats in allopatry than sympatry, indicating that gene flow may constrain physiological adaptation when dispersal between warm and cold habitats is possible. In sum, our study suggests that fish may diverge toward a lower SMR in a warming world, but this might depend on connectivity and gene flow between different thermal habitats. A free Plain Language Summary can be found within the Supporting Information of this article. |
author2 |
White, Craig Natural Environment Research Council H2020 European Research Council |
format |
Article in Journal/Newspaper |
author |
Pilakouta, Natalie Killen, Shaun S. Kristjánsson, Bjarni K. Skúlason, Skúli Lindström, Jan Metcalfe, Neil B. Parsons, Kevin J. |
spellingShingle |
Pilakouta, Natalie Killen, Shaun S. Kristjánsson, Bjarni K. Skúlason, Skúli Lindström, Jan Metcalfe, Neil B. Parsons, Kevin J. Multigenerational exposure to elevated temperatures leads to a reduction in standard metabolic rate in the wild |
author_facet |
Pilakouta, Natalie Killen, Shaun S. Kristjánsson, Bjarni K. Skúlason, Skúli Lindström, Jan Metcalfe, Neil B. Parsons, Kevin J. |
author_sort |
Pilakouta, Natalie |
title |
Multigenerational exposure to elevated temperatures leads to a reduction in standard metabolic rate in the wild |
title_short |
Multigenerational exposure to elevated temperatures leads to a reduction in standard metabolic rate in the wild |
title_full |
Multigenerational exposure to elevated temperatures leads to a reduction in standard metabolic rate in the wild |
title_fullStr |
Multigenerational exposure to elevated temperatures leads to a reduction in standard metabolic rate in the wild |
title_full_unstemmed |
Multigenerational exposure to elevated temperatures leads to a reduction in standard metabolic rate in the wild |
title_sort |
multigenerational exposure to elevated temperatures leads to a reduction in standard metabolic rate in the wild |
publisher |
Wiley |
publishDate |
2020 |
url |
http://dx.doi.org/10.1111/1365-2435.13538 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2F1365-2435.13538 https://onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2435.13538 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/1365-2435.13538 https://besjournals.onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2435.13538 |
genre |
Iceland |
genre_facet |
Iceland |
op_source |
Functional Ecology volume 34, issue 6, page 1205-1214 ISSN 0269-8463 1365-2435 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1111/1365-2435.13538 |
container_title |
Functional Ecology |
container_volume |
34 |
container_issue |
6 |
container_start_page |
1205 |
op_container_end_page |
1214 |
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1810452156147302400 |