Climatic niche evolution is faster in sympatric than allopatric lineages of the butterfly genus Pyrgus.

Détails

ID Serval
serval:BIB_A136102DA93B
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Climatic niche evolution is faster in sympatric than allopatric lineages of the butterfly genus Pyrgus.
Périodique
Proceedings of the Royal Society B. Biological Sciences
Auteur⸱e⸱s
Pitteloud C., Arrigo N., Suchan T., Mastretta-Yanes A., Vila R., Dincă V., Hernández-Roldán J., Brockmann E., Chittaro Y., Kleckova I., Fumagalli L., Buerki S., Pellissier L., Alvarez N.
ISSN
1471-2954 (Electronic)
ISSN-L
0962-8452
Statut éditorial
Publié
Date de publication
2017
Peer-reviewed
Oui
Volume
284
Numéro
1852
Pages
20170208
Langue
anglais
Résumé
Understanding how speciation relates to ecological divergence has long fascinated biologists. It is assumed that ecological divergence is essential to sympatric speciation, as a mechanism to avoid competition and eventually lead to reproductive isolation, while divergence in allopatry is not necessarily associated with niche differentiation. The impact of the spatial context of divergence on the evolutionary rates of abiotic dimensions of the ecological niche has rarely been explored for an entire clade. Here, we compare the magnitude of climatic niche shifts between sympatric versus allopatric divergence of lineages in butterflies. By combining next-generation sequencing, parametric biogeography and ecological niche analyses applied to a genus-wide phylogeny of Palaearctic Pyrgus butterflies, we compare evolutionary rates along eight climatic dimensions across sister lineages that diverged in large-scale sympatry versus allopatry. In order to examine the possible effects of the spatial scale at which sympatry is defined, we considered three sets of biogeographic assignments, ranging from narrow to broad definition. Our findings suggest higher rates of niche evolution along all climatic dimensions for sister lineages that diverge in sympatry, when using a narrow delineation of biogeographic areas. This result contrasts with significantly lower rates of climatic niche evolution found in cases of allopatric speciation, despite the biogeographic regions defined here being characterized by significantly different climates. Higher rates in allopatry are retrieved when biogeographic areas are too widely defined-in such a case allopatric events may be recorded as sympatric. Our results reveal the macro-evolutionary significance of abiotic niche differentiation involved in speciation processes within biogeographic regions, and illustrate the importance of the spatial scale chosen to define areas when applying parametric biogeographic analyses.
Mots-clé
climatic niche, macro-evolutionary processes, next-generation sequencing, parametric biogeography
Pubmed
Web of science
Open Access
Oui
Création de la notice
28/04/2017 8:55
Dernière modification de la notice
17/02/2020 6:20
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