Molecular Response to Extreme Summer Temperatures Differs Between Two Genetically Differentiated Populations of a Coral Reef Fish
Extreme thermal events are increasing in frequency and duration as the climate continues to warm, with potential detrimental effects on marine organisms. However, the effects of heatwaves may differ among geographically separated populations depending on their capacity for thermal plasticity. Here,...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2018-09-01
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| Series: | Frontiers in Marine Science |
| Subjects: | |
| Online Access: | https://www.frontiersin.org/article/10.3389/fmars.2018.00349/full |
| _version_ | 1819327234372009984 |
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| author | Heather D. Veilleux Taewoo Ryu Jennifer M. Donelson Timothy Ravasi Philip L. Munday |
| author_facet | Heather D. Veilleux Taewoo Ryu Jennifer M. Donelson Timothy Ravasi Philip L. Munday |
| author_sort | Heather D. Veilleux |
| collection | DOAJ |
| description | Extreme thermal events are increasing in frequency and duration as the climate continues to warm, with potential detrimental effects on marine organisms. However, the effects of heatwaves may differ among geographically separated populations depending on their capacity for thermal plasticity. Here, we compared the response to simulated summer heatwave temperatures (+1.5 and +3.0°C above average) in two populations of a coral reef damselfish with different capacities for thermal plasticity. We found that the more thermally tolerant population had greater plasticity of gene expression and had significantly more downregulated genes, which may provide more energy to repair damage associated with thermal stress and to maintain basic functions at these extreme temperatures. In contrast, the thermally sensitive population exhibited higher basal levels of heat shock proteins and had three times fewer changes in gene expression overall. The limited changes in gene regulation suggest that individuals have reduced genome plasticity to tolerate thermal fluctuations and consequently may not have enough energy to repair damage and resume cellular homeostasis at extreme temperatures. Thus, we have identified the molecular signatures of how two genetically distinct fish populations cope with an extreme thermal event, and why they differ in their capacity for thermal plasticity. |
| first_indexed | 2024-12-24T13:07:36Z |
| format | Article |
| id | doaj.art-51628933b59c442492d5fead74b0018b |
| institution | Directory Open Access Journal |
| issn | 2296-7745 |
| language | English |
| last_indexed | 2024-12-24T13:07:36Z |
| publishDate | 2018-09-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Marine Science |
| spelling | doaj.art-51628933b59c442492d5fead74b0018b2022-12-21T16:53:57ZengFrontiers Media S.A.Frontiers in Marine Science2296-77452018-09-01510.3389/fmars.2018.00349405031Molecular Response to Extreme Summer Temperatures Differs Between Two Genetically Differentiated Populations of a Coral Reef FishHeather D. Veilleux0Taewoo Ryu1Jennifer M. Donelson2Timothy Ravasi3Philip L. Munday4ARC Centre of Excellence for Coral Reef Studies, James Cook University, Townsville, QLD, AustraliaAPEC Climate Center, Busan, South KoreaARC Centre of Excellence for Coral Reef Studies, James Cook University, Townsville, QLD, AustraliaKAUST Environmental Epigenetic Program, Division of Biological and Environmental Sciences and Engineering, King Abdullah University of Science and Technology, Thuwal, Saudi ArabiaARC Centre of Excellence for Coral Reef Studies, James Cook University, Townsville, QLD, AustraliaExtreme thermal events are increasing in frequency and duration as the climate continues to warm, with potential detrimental effects on marine organisms. However, the effects of heatwaves may differ among geographically separated populations depending on their capacity for thermal plasticity. Here, we compared the response to simulated summer heatwave temperatures (+1.5 and +3.0°C above average) in two populations of a coral reef damselfish with different capacities for thermal plasticity. We found that the more thermally tolerant population had greater plasticity of gene expression and had significantly more downregulated genes, which may provide more energy to repair damage associated with thermal stress and to maintain basic functions at these extreme temperatures. In contrast, the thermally sensitive population exhibited higher basal levels of heat shock proteins and had three times fewer changes in gene expression overall. The limited changes in gene regulation suggest that individuals have reduced genome plasticity to tolerate thermal fluctuations and consequently may not have enough energy to repair damage and resume cellular homeostasis at extreme temperatures. Thus, we have identified the molecular signatures of how two genetically distinct fish populations cope with an extreme thermal event, and why they differ in their capacity for thermal plasticity.https://www.frontiersin.org/article/10.3389/fmars.2018.00349/fullclimate changeheatwavesocean warmingtranscriptomicsgenomicslocal adaptation |
| spellingShingle | Heather D. Veilleux Taewoo Ryu Jennifer M. Donelson Timothy Ravasi Philip L. Munday Molecular Response to Extreme Summer Temperatures Differs Between Two Genetically Differentiated Populations of a Coral Reef Fish Frontiers in Marine Science climate change heatwaves ocean warming transcriptomics genomics local adaptation |
| title | Molecular Response to Extreme Summer Temperatures Differs Between Two Genetically Differentiated Populations of a Coral Reef Fish |
| title_full | Molecular Response to Extreme Summer Temperatures Differs Between Two Genetically Differentiated Populations of a Coral Reef Fish |
| title_fullStr | Molecular Response to Extreme Summer Temperatures Differs Between Two Genetically Differentiated Populations of a Coral Reef Fish |
| title_full_unstemmed | Molecular Response to Extreme Summer Temperatures Differs Between Two Genetically Differentiated Populations of a Coral Reef Fish |
| title_short | Molecular Response to Extreme Summer Temperatures Differs Between Two Genetically Differentiated Populations of a Coral Reef Fish |
| title_sort | molecular response to extreme summer temperatures differs between two genetically differentiated populations of a coral reef fish |
| topic | climate change heatwaves ocean warming transcriptomics genomics local adaptation |
| url | https://www.frontiersin.org/article/10.3389/fmars.2018.00349/full |
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