Ecology and Sexual Selection: Evolution of Wing Pigmentation in Calopterygid Damselflies in Relation to Latitude, Sexual Dimorphism, and Speciation
Författare
Summary, in English
Our knowledge about how the environment influences sexual selection regimes and how ecology and sexual selection interact is still limited. We performed an integrative study of wing pigmentation in calopterygid damselflies, combining phylogenetic comparative analyses, field observations and experiments. We investigated the evolutionary consequences of wing pigmentation for sexual dimorphism, speciation, and extinction and addressed the possible thermoregulatory benefits of pigmentation. First, we reconstructed ancestral states of male and female phenotypes and traced the evolutionary change of wing pigmentation. Clear wings are the ancestral state and that pigmentation dimorphism is derived, suggesting that sexual selection results in sexual dimorphism. We further demonstrate that pigmentation elevates speciation and extinction rates. We also document a significant biogeographic association with pigmented species primarily occupying northern temperate regions with cooler climates. Field observations and experiments on two temperate sympatric species suggest a link between pigmentation, thermoregulation, and sexual selection, although body temperature is also affected by other phenotypic traits such as body mass, microhabitat selection, and thermoregulatory behaviors. Taken together, our results suggest an important role for wing pigmentation in sexual selection in males and in speciation. Wing pigmentation might not increase ecological adaptation and species longevity, and its primary function is in sexual signaling and species recognition.
Avdelning/ar
Publiceringsår
2013
Språk
Engelska
Sidor
174-195
Publikation/Tidskrift/Serie
American Naturalist
Volym
182
Issue
5
Dokumenttyp
Artikel i tidskrift
Förlag
University of Chicago Press
Ämne
- Biological Sciences
Nyckelord
- BiSSE
- body temperature
- Calopterygidae
- Diversitree
- insects
- melanin
- odonates
- thermal adaptation
- thermal imaging
Status
Published
Forskningsgrupp
- Evolution and Ecology of Phenotypes in Nature
ISBN/ISSN/Övrigt
- ISSN: 0003-0147