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Sympatric divergence and clinal variation in multiple coloration traits of Ficedula flycatchers
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2015 (English)In: Journal of Evolutionary Biology, ISSN 1010-061X, E-ISSN 1420-9101, Vol. 28, no 4, 779-790 p.Article in journal (Refereed) Published
Abstract [en]

Geographic variation in phenotypes plays a key role in fundamental evolutionary processes such as local adaptation, population differentiation and speciation, but the selective forces behind it are rarely known. We found support for the hypothesis that geographic variation in plumage traits of the pied flycatcher Ficedula hypoleuca is explained by character displacement with the collared flycatcher Ficedula albicollis in the contact zone. The plumage traits of the pied flycatcher differed strongly from the more conspicuous collared flycatcher in a sympatric area but increased in conspicuousness with increasing distance to there. Phenotypic differentiation (P-ST) was higher than that in neutral genetic markers (F-ST), and the effect of geographic distance remained when statistically controlling for neutral genetic differentiation. This suggests that a cline created by character displacement and gene flow explains phenotypic variation across the distribution of this species. The different plumage traits of the pied flycatcher are strongly to moderately correlated, indicating that they evolve non-independently from each other. The flycatchers provide an example of plumage patterns diverging in two species that differ in several aspects of appearance. The divergence in sympatry and convergence in allopatry in these birds provide a possibility to study the evolutionary mechanisms behind the highly divergent avian plumage patterns.

Place, publisher, year, edition, pages
2015. Vol. 28, no 4, 779-790 p.
Keyword [en]
hybridization, melanin, phenotypic integration, phenotypic variation, reinforcement, sexual selection, spatial variation, speciation
National Category
Biological Sciences
URN: urn:nbn:se:uu:diva-253072DOI: 10.1111/jeb.12604ISI: 000353295200004PubMedID: 25683091OAI: oai:DiVA.org:uu-253072DiVA: diva2:820075
Available from: 2015-06-11 Created: 2015-05-20 Last updated: 2015-06-11Bibliographically approved

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