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Within-population variability in coral heat tolerance indicates climate adaptation potential
Coral reefs are facing unprecedented mass bleaching and mortality events due to marine heatwaves and climate change. To avoid extirpation, corals must adapt. Individual variation in heat tolerance and its heritability underpin the potential for coral adaptation. However, the magnitude of heat tolera...
Autores principales: | , , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Royal Society
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9428547/ https://www.ncbi.nlm.nih.gov/pubmed/36043280 http://dx.doi.org/10.1098/rspb.2022.0872 |
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author | Humanes, Adriana Lachs, Liam Beauchamp, Elizabeth A. Bythell, John C. Edwards, Alasdair J. Golbuu, Yimnang Martinez, Helios M. Palmowski, Paweł Treumann, Achim van der Steeg, Eveline van Hooidonk, Ruben Guest, James R. |
author_facet | Humanes, Adriana Lachs, Liam Beauchamp, Elizabeth A. Bythell, John C. Edwards, Alasdair J. Golbuu, Yimnang Martinez, Helios M. Palmowski, Paweł Treumann, Achim van der Steeg, Eveline van Hooidonk, Ruben Guest, James R. |
author_sort | Humanes, Adriana |
collection | PubMed |
description | Coral reefs are facing unprecedented mass bleaching and mortality events due to marine heatwaves and climate change. To avoid extirpation, corals must adapt. Individual variation in heat tolerance and its heritability underpin the potential for coral adaptation. However, the magnitude of heat tolerance variability within coral populations is largely unresolved. We address this knowledge gap by exposing corals from a single reef to an experimental marine heatwave. We found that double the heat stress dosage was required to induce bleaching in the most-tolerant 10%, compared to the least-tolerant 10% of the population. By the end of the heat stress exposure, all of the least-tolerant corals were dead, whereas the most-tolerant remained alive. To contextualize the scale of this result over the coming century, we show that under an ambitious future emissions scenario, such differences in coral heat tolerance thresholds equate to up to 17 years delay until the onset of annual bleaching and mortality conditions. However, this delay is limited to only 10 years under a high emissions scenario. Our results show substantial variability in coral heat tolerance which suggests scope for natural or assisted evolution to limit the impacts of climate change in the short-term. For coral reefs to persist through the coming century, coral adaptation must keep pace with ocean warming, and ambitious emissions reductions must be realized. |
format | Online Article Text |
id | pubmed-9428547 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | The Royal Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-94285472022-09-01 Within-population variability in coral heat tolerance indicates climate adaptation potential Humanes, Adriana Lachs, Liam Beauchamp, Elizabeth A. Bythell, John C. Edwards, Alasdair J. Golbuu, Yimnang Martinez, Helios M. Palmowski, Paweł Treumann, Achim van der Steeg, Eveline van Hooidonk, Ruben Guest, James R. Proc Biol Sci Ecology Coral reefs are facing unprecedented mass bleaching and mortality events due to marine heatwaves and climate change. To avoid extirpation, corals must adapt. Individual variation in heat tolerance and its heritability underpin the potential for coral adaptation. However, the magnitude of heat tolerance variability within coral populations is largely unresolved. We address this knowledge gap by exposing corals from a single reef to an experimental marine heatwave. We found that double the heat stress dosage was required to induce bleaching in the most-tolerant 10%, compared to the least-tolerant 10% of the population. By the end of the heat stress exposure, all of the least-tolerant corals were dead, whereas the most-tolerant remained alive. To contextualize the scale of this result over the coming century, we show that under an ambitious future emissions scenario, such differences in coral heat tolerance thresholds equate to up to 17 years delay until the onset of annual bleaching and mortality conditions. However, this delay is limited to only 10 years under a high emissions scenario. Our results show substantial variability in coral heat tolerance which suggests scope for natural or assisted evolution to limit the impacts of climate change in the short-term. For coral reefs to persist through the coming century, coral adaptation must keep pace with ocean warming, and ambitious emissions reductions must be realized. The Royal Society 2022-08-31 2022-08-31 /pmc/articles/PMC9428547/ /pubmed/36043280 http://dx.doi.org/10.1098/rspb.2022.0872 Text en © 2022 The Authors. https://creativecommons.org/licenses/by/4.0/Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, provided the original author and source are credited. |
spellingShingle | Ecology Humanes, Adriana Lachs, Liam Beauchamp, Elizabeth A. Bythell, John C. Edwards, Alasdair J. Golbuu, Yimnang Martinez, Helios M. Palmowski, Paweł Treumann, Achim van der Steeg, Eveline van Hooidonk, Ruben Guest, James R. Within-population variability in coral heat tolerance indicates climate adaptation potential |
title | Within-population variability in coral heat tolerance indicates climate adaptation potential |
title_full | Within-population variability in coral heat tolerance indicates climate adaptation potential |
title_fullStr | Within-population variability in coral heat tolerance indicates climate adaptation potential |
title_full_unstemmed | Within-population variability in coral heat tolerance indicates climate adaptation potential |
title_short | Within-population variability in coral heat tolerance indicates climate adaptation potential |
title_sort | within-population variability in coral heat tolerance indicates climate adaptation potential |
topic | Ecology |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9428547/ https://www.ncbi.nlm.nih.gov/pubmed/36043280 http://dx.doi.org/10.1098/rspb.2022.0872 |
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