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Local divergence of thermal reaction norms among amphibian populations is affected by pond temperature variation
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology.ORCID iD: 0000-0002-8559-5191
CSIC, Estn Biol Donana, Dept Evolutionary Ecol, Seville 41092, Spain..
CSIC, Estn Biol Donana, Dept Evolutionary Ecol, Seville 41092, Spain..
Univ A Coruna, Grp Invest BIOCOST, Coruna 15071, Spain..
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2015 (English)In: Evolution, ISSN 0014-3820, E-ISSN 1558-5646, Vol. 69, no 8, 2210-2226 p.Article, review/survey (Refereed) Published
Abstract [en]

Although temperature variation is known to cause large-scale adaptive divergence, its potential role as a selective factor over microgeographic scales is less well-understood. Here, we investigated how variation in breeding pond temperature affects divergence in multiple physiological (thermal performance curve and critical thermal maximum [CTmax]) and life-history (thermal developmental reaction norms) traits in a network of Rana arvalis populations. The results supported adaptive responses to face two main constraints limiting the evolution of thermal adaptation. First, we found support for the faster-slower model, indicating an adaptive response to compensate for the thermodynamic constraint of low temperatures in colder environments. Second, we found evidence for the generalist-specialist trade-off with populations from colder and less thermally variable environments exhibiting a specialist phenotype performing at higher rates but over a narrower range of temperatures. By contrast, the local optimal temperature for locomotor performance and CTmax did not match either mean or maximum pond temperatures. These results highlight the complexity of the adaptive multiple-trait thermal responses in natural populations, and the role of local thermal variation as a selective force driving diversity in life-history and physiological traits in the presence of gene flow.

Place, publisher, year, edition, pages
2015. Vol. 69, no 8, 2210-2226 p.
Keyword [en]
Amphibians, countergradient variation, CTmax, ectotherms, F-ST-Q(ST), generalist-specialist trade-off, hotter-colder, thermal adaptation, thermal fluctuations, thermal performance curves
National Category
Biological Sciences
URN: urn:nbn:se:uu:diva-264488DOI: 10.1111/evo.12711ISI: 000360493700019PubMedID: 26118477OAI: oai:DiVA.org:uu-264488DiVA: diva2:860955
Swedish Research Council Formas, 2007-903
Available from: 2015-10-14 Created: 2015-10-13 Last updated: 2015-10-14Bibliographically approved

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