Character displacement can affect sexual selection by generating shifts in an organism's phenotype or in the habitat in which mating takes place. Character displacement also alters the underlying fitness effects of mate choice. Such changes can enhance divergence between populations that do and do not co-occur with another species. Consequently, when character displacement and sexual selection act together, each process can enhance the diversifying nature of the other. Sexual selection can, in turn, affect character displacement by either impeding or facilitating it. In particular, sexual selection might impede character displacement if it precludes the expression of traits that reduce species interactions. Sexual selection might facilitate character displacement if traits that minimize such interactions enhance an individual's ability to acquire mates.
Keywords: mate choice; mate quality recognition; mating system; sexual selection; species interactions; species recognition
Chapter. 8614 words. Illustrated.
Subjects: Biodiversity and Conservation Biology
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