Dynamic patterns of adaptive radiation: evolution of mating preferences

Gavrilets, Sergey; Vose, Aaron; Butlin, Roger; Bridle, Jon R.; Schluter, Dolph

doi:10.1017/cbo9780511815683.008

Cited by 19 publications

(29 citation statements)

References 69 publications

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“…Quantitative genetic approaches assume that individual phenotypes are governed by an infinite number of loci at which alleles have infinitesimal effects (Bulmer 1980). However, the effect sizes of alleles at loci governing mate choice are known to affect the probability of speciation (Gavrilets and Vose 2005, Gavrilets and Vose 2009; Gavrilets et al 2007) and are likely also to affect the probabilities of species collapse and reemergence. In general, adaptive speciation is expected to occur most readily when allele effect sizes are intermediate or large (Gavrilets and Vose 2005, 2009; Doebeli et al 2007; Gavrilets et al 2007).…”

Section: Methodsmentioning

confidence: 99%

“…However, the effect sizes of alleles at loci governing mate choice are known to affect the probability of speciation (Gavrilets and Vose 2005, Gavrilets and Vose 2009; Gavrilets et al 2007) and are likely also to affect the probabilities of species collapse and reemergence. In general, adaptive speciation is expected to occur most readily when allele effect sizes are intermediate or large (Gavrilets and Vose 2005, 2009; Doebeli et al 2007; Gavrilets et al 2007). Moreover, there is evidence from nature that mate preference in incipient species pairs is, at least in some cases, governed by small numbers of loci with large effects (Henry et al 2002; Haesler and Seehausen 2005; van der Sluijs et al 2010).…”

Section: Methodsmentioning

confidence: 99%

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Hybridization, Species Collapse, and Species Reemergence After Disturbance to Premating Mechanisms of Reproductive Isolation

Gilman

Behm²

2011

Evolution

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There are now a number of well-studied cases in which hybridization between closely related sympatric species has increased, sometimes resulting in the replacement of species pairs by hybrid swarms. Many of these cases have been linked to anthropogenic environmental change, but the mechanisms leading from environmental change to species collapse, and the long-term effects of hybridization on species pairs, remain poorly understood. We used an individual-based stochastic simulation model to explore the conditions under which disturbances that weaken premating barriers to reproduction patterns between sympatric species might lead to increased hybridization and to species collapse. Disturbances often resulted in bouts of hybridization, but in many cases strong reproductive isolation spontaneously reemerged. This was sometimes true even after hybrid swarms had replaced parental species. The reemergence of species pairs was most likely when disturbances were of short duration. Counterintuitively, incipient species pairs were more likely to reemerge after strong but temporary disturbances than after weaker disturbances of the same duration. Even temporary bouts of hybridization often led to substantial homogenization of species pairs. This suggests that ecosystem managers may be able to refill ecological niches, but in general will not be able to resurrect lost species after species collapse.K E Y W O R D S : Hybridization, models/simulations, reproductive isolation, speciation.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Hybridization, Species Collapse, and Species Reemergence After Disturbance to Premating Mechanisms of Reproductive Isolation

Gilman

Behm²

2011

Evolution

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“…Our work adopts several important elements from previous numerical models of adaptive radiation and ecological speciation (Gavrilets & Vose, 2005; Yukilevich & True, 2006; Gavrilets et al. , 2007; Gavrilets & Vose, 2009; Thibert‐Plante & Hendry, 2009). In particular, we use hard selection (Christiansen, 1975) rather than soft selection (Kisdi & Geritz, 1999; Spichtig & Kawecki, 2004) to provide a more realistic dynamic for changing population size (during colonization).…”

Section: Modelling Frameworkmentioning

confidence: 99%

“…, 1998; Gavrilets & Vose, 2005; Gavrilets et al. , 2007; Gavrilets & Vose, 2007, 2009). At the same time, we implement two major differences from those previous models.…”

Section: Modelling Frameworkmentioning

confidence: 99%

The consequences of phenotypic plasticity for ecological speciation

Thibert-Plante

Hendry

2010

J of Evolutionary Biology

166

190

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We use an individual‐based numerical simulation to study the effects of phenotypic plasticity on ecological speciation. We find that adaptive plasticity evolves readily in the presence of dispersal between populations from different ecological environments. This plasticity promotes the colonization of new environments but reduces genetic divergence between them. We also find that the evolution of plasticity can either enhance or degrade the potential for divergent selection to form reproductive barriers. Of particular importance here is the timing of plasticity in relation to the timing of dispersal. If plasticity is expressed after dispersal, reproductive barriers are generally weaker because plasticity allows migrants to be better suited for their new environment. If plasticity is expressed before dispersal, reproductive barriers are either unaffected or enhanced. Among the potential reproductive barriers we considered, natural selection against migrants was the most important, primarily because it was the earliest‐acting barrier. Accordingly, plasticity had a much greater effect on natural selection against migrants than on sexual selection against migrants or on natural and sexual selection against hybrids. In general, phenotypic plasticity can strongly alter the process of ecological speciation and should be considered when studying the evolution of reproductive barriers.

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“…Overall, it is unclear how pervasive the phenomenon of 'AR in stages' actually is in nature. Although theoretical work [18][19][20] points to the model having merit, empirical testing is hampered by the need to obtain data for a number of traits for many member species of an AR. Synthesizing different studies of trait evolution into a test of the 'stages model' is further complicated by the lack of taxonomic overlap between studies, unclear phylogenetic relationships, the study of different traits, and/or the application of different analytical approaches.…”

Section: Introductionmentioning

confidence: 99%

Testing the stages model in the adaptive radiation of cichlid fishes in East African Lake Tanganyika

et al. 2014

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Adaptive radiation (AR) is a key process in the origin of organismal diversity. However, the evolution of trait disparity in connection with ecological specialization is still poorly understood. Available models for vertebrate ARs predict that diversification occurs in the form of temporal stages driven by different selective forces. Here, we investigate the AR of cichlid fishes in East African Lake Tanganyika and use macroevolutionary model fitting to evaluate whether diversification happened in temporal stages. Six trait complexes, for which we also provide evidence of their adaptiveness, are analysed with comparative methods: body shape, pharyngeal jaw shape, gill raker traits, gut length, brain weight and body coloration. Overall, we do not find strong evidence for the ‘stages model’ of AR. However, our results suggest that trophic traits diversify earlier than traits implicated in macrohabitat adaptation and that sexual communication traits (i.e. coloration) diversify late in the radiation.

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Dynamic patterns of adaptive radiation: evolution of mating preferences

Cited by 19 publications

References 69 publications

Hybridization, Species Collapse, and Species Reemergence After Disturbance to Premating Mechanisms of Reproductive Isolation

Hybridization, Species Collapse, and Species Reemergence After Disturbance to Premating Mechanisms of Reproductive Isolation

The consequences of phenotypic plasticity for ecological speciation

Testing the stages model in the adaptive radiation of cichlid fishes in East African Lake Tanganyika

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