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| Main Authors: | , , , , , |
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| Format: | Artículo científico |
| Language: | en |
| Published: |
Evolutionary applications
2026
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| Online Access: | https://pubmed.ncbi.nlm.nih.gov/42089098/ |
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| _version_ | 1868266051126427650 |
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| author | Mamoozadeh, Nadya Cooper, Arthur Quinlan, Henry Varian, Anna Infante, Dana Meek, Mariah |
| author_facet | Mamoozadeh, Nadya Cooper, Arthur Quinlan, Henry Varian, Anna Infante, Dana Meek, Mariah Mamoozadeh, Nadya Cooper, Arthur Quinlan, Henry Varian, Anna Infante, Dana Meek, Mariah |
| collection | PubMed - marine biology |
| contents | Dams and Introduced Species Drive Patterns of Environmental Adaptation in an Iconic but Imperiled Coldwater Fish (Brook Trout, ). Mamoozadeh, Nadya Cooper, Arthur Quinlan, Henry Varian, Anna Infante, Dana Meek, Mariah Freshwater biodiversity is being disproportionately negatively impacted by anthropogenic stressors including climate change, partly due to limited opportunities to seek more favorable conditions compared to marine and terrestrial species. Management plans that maintain locally adapted genotypes, and integrate active management interventions where needed, are vital for curbing further biodiversity loss but require information on environmental adaptation. Here, we explore environmental adaptation in native populations of a cold-adapted freshwater species (brook trout, ) with a long history of negative impacts from human-induced stressors and now increasingly affected by climate change. We developed a new restriction site-associated DNA capture panel to genotype 3297 SNPs in over 2200 brook trout from 55 waterways across the Lake Superior basin. We used partial redundancy analyses to identify over 300 SNPs potentially involved in adaptation. Our study is among the first to implicate both movement barriers and introduced species in shaping environmental adaptation, along with climate. System-specific variables for introduced Pacific salmon and stream fragmentation caused by movement barriers exhibited some of the strongest associations with genetic variation, highlighting the role that dams and introduced species-features characteristic of the Great Lakes and much of North America-may play in shaping adaptation in native fishes. We also identified temperature and stream flow as strongly associated with putatively adaptive genetic variation, as reported in other studies. Importantly, these insights were possible given locally derived environmental information, which we analyzed alongside widely accessible broad-scale climate data. Finally, by calculating adaptive index and genomic offset, we identified areas where brook trout appear heterogeneously adapted across the landscape and where locally adapted genotypes may be prone to disruption from climate change. Our findings offer novel insights into environmental adaptation in brook trout and foundational knowledge for developing management plans that conserve the adaptive capacity of populations already experiencing changing conditions. |
| format | Artículo científico |
| id | pubmed_42089098 |
| institution | PubMed |
| language | en |
| publishDate | 2026 |
| publisher | Evolutionary applications |
| record_format | pubmed |
| spellingShingle | Dams and Introduced Species Drive Patterns of Environmental Adaptation in an Iconic but Imperiled Coldwater Fish (Brook Trout, ). Mamoozadeh, Nadya Cooper, Arthur Quinlan, Henry Varian, Anna Infante, Dana Meek, Mariah Dams and Introduced Species Drive Patterns of Environmental Adaptation in an Iconic but Imperiled Coldwater Fish (Brook Trout, ). Mamoozadeh, Nadya Cooper, Arthur Quinlan, Henry Varian, Anna Infante, Dana Meek, Mariah Freshwater biodiversity is being disproportionately negatively impacted by anthropogenic stressors including climate change, partly due to limited opportunities to seek more favorable conditions compared to marine and terrestrial species. Management plans that maintain locally adapted genotypes, and integrate active management interventions where needed, are vital for curbing further biodiversity loss but require information on environmental adaptation. Here, we explore environmental adaptation in native populations of a cold-adapted freshwater species (brook trout, ) with a long history of negative impacts from human-induced stressors and now increasingly affected by climate change. We developed a new restriction site-associated DNA capture panel to genotype 3297 SNPs in over 2200 brook trout from 55 waterways across the Lake Superior basin. We used partial redundancy analyses to identify over 300 SNPs potentially involved in adaptation. Our study is among the first to implicate both movement barriers and introduced species in shaping environmental adaptation, along with climate. System-specific variables for introduced Pacific salmon and stream fragmentation caused by movement barriers exhibited some of the strongest associations with genetic variation, highlighting the role that dams and introduced species-features characteristic of the Great Lakes and much of North America-may play in shaping adaptation in native fishes. We also identified temperature and stream flow as strongly associated with putatively adaptive genetic variation, as reported in other studies. Importantly, these insights were possible given locally derived environmental information, which we analyzed alongside widely accessible broad-scale climate data. Finally, by calculating adaptive index and genomic offset, we identified areas where brook trout appear heterogeneously adapted across the landscape and where locally adapted genotypes may be prone to disruption from climate change. Our findings offer novel insights into environmental adaptation in brook trout and foundational knowledge for developing management plans that conserve the adaptive capacity of populations already experiencing changing conditions. |
| title | Dams and Introduced Species Drive Patterns of Environmental Adaptation in an Iconic but Imperiled Coldwater Fish (Brook Trout, ). |
| url | https://pubmed.ncbi.nlm.nih.gov/42089098/ |