Journal
TRENDS IN ECOLOGY & EVOLUTION
Volume 36, Issue 12, Pages 1153-1163Publisher
CELL PRESS
DOI: 10.1016/j.tree.2021.09.004
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- National Evolutionary Synthesis Center (NESCent) through the National Science Foundation (NSF) [EF-0905606]
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Sexual selection plays an essential role in speciation, but alone it rarely leads to reproductive isolation without ecological divergence. The ways in which sexual selection contributes to divergence vary according to the context of speciation.
Twenty years ago, a seminal paper summarized the role of sexual selection in speciation as the coordinated evolution of (male) courtship signals and (female) preferences leading to prezygotic (behavioral) isolation between divergent lineages. Here, we discuss areas of progress that inspire an updated perspective. First, research has identified multiple mechanisms of sexual selection, in addition to female mate choice, that drive the origin and maintenance of species. Second, reviews and empirical data now conclude that sexual selection alone will rarely lead to reproductive isolation without ecological divergence, and we discuss the assumptions and possible exceptions underlying that conclusion. Finally, we consider the variable ways in which sexual selection contributes to divergence according to the spatial, temporal, social, ecological, and genomic context of speciation.
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