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Gene Flow Limits Ad...
Gene Flow Limits Adaptation along Steep Environmental Gradients
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- Bachmann, Judith C. (författare)
- Univ Zurich, Dept Evolutionary Biol & Environm Studies, Zurich, Switzerland
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- van Rensburg, Alexandra Jansen (författare)
- Univ Zurich, Dept Evolutionary Biol & Environm Studies, Zurich, Switzerland;Univ Bristol, Sch Biol Sci, Bristol, Avon, England
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- Cortazar-Chinarro, Maria (författare)
- Uppsala universitet,Zooekologi
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- Laurila, Anssi (författare)
- Uppsala universitet,Zooekologi
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- Van Buskirk, Josh (författare)
- Univ Zurich, Dept Evolutionary Biol & Environm Studies, Zurich, Switzerland
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(creator_code:org_t)
- UNIV CHICAGO PRESS, 2020
- 2020
- Engelska.
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Ingår i: American Naturalist. - : UNIV CHICAGO PRESS. - 0003-0147 .- 1537-5323. ; 195:3, s. E67-E86
- Relaterad länk:
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https://www.zora.uzh...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
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- When environmental variation is spatially continuous, dispersing individuals move among nearby sites with similar habitat conditions. But as an environmental gradient becomes steeper, gene flow may connect more divergent habitats, and this is predicted to reduce the slope of the adaptive dine that evolves. We compared quantitative genetic divergence of Rana temporaria frog populations along a 2,000-m elevational gradient in eastern Switzerland (new experimental results) with divergence along a 1,550-km latitudinal gradient in Fennoscandia (previously published results). Both studies found significant countergradient variation in larval development rate (i.e., animals from cold climates developed more rapidly). The dine was weaker with elevation than with latitude. Animals collected on both gradients were genotyped at similar to 2,000 singlenucleotide polymorphism markers, revealing that dispersal distance was 30% farther on the latitudinal gradient but 3.9 times greater with respect to environmental conditions on the elevational gradient. A meta-analysis of 19 experimental studies of anuran populations spanning temperature gradients revealed that countergradient variation in larval development, while significant overal I, was weaker when measured on steeper gradients. These findings support the prediction that adaptive population divergence is less pronounced, and maladaptation more pervasive, on steep environmental gradients.
Ämnesord
- NATURVETENSKAP -- Biologi -- Evolutionsbiologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Evolutionary Biology (hsv//eng)
Nyckelord
- amphibian
- climate gradient
- countergradient variation
- gene flow
- isolation-by-distance method
- maladaptation
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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