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http://eprints.org/relation/isVersionOf https://pure.iiasa.ac.at/id/document/13622 http://eprints.org/relation/isVolatileVersionOf https://pure.iiasa.ac.at/id/document/13622 http://eprints.org/relation/isCoversheetVersionOf https://pure.iiasa.ac.at/id/document/13622 archive 351 disk0/00/01/02/35 2016-01-15 08:48:05 2021-08-27 17:22:58 2016-01-15 08:48:05 monograph show 3 Fazalova V. 8137 Dieckmann U. 1668 0000-0001-7089-0393 pub iis_ecl prog_eep Questions: How does spatial self-structuring influence the waiting time until adaptive speciation in a population with sexual reproduction? Which mechanisms underlie this effect? Model: Using a spatially explicit individual-based multi-locus model of adaptive speciation, we investigate the evolution of a sexually reproducing population, with different levels of spatial self-structuring induced by different distances of natal dispersal. We analyze how waiting times until speciation are affected by the mobility of individuals, the number of loci determining the phenotype under disruptive selection, and the mating costs for individuals preferring rare phenotypes. Conclusions: Spatial self-structuring facilitates the evolution of assortative mating and accelerates adaptive speciation. We identify three mechanisms that are responsible for this effect: (i) spatial self-structuring promotes the evolution of assortativity by providing assortative mating "for free," as individuals find phenotypically similar mates within their spatial clusters; (ii) it helps assortatively mating individuals with rare phenotypes to find mating partners even when the selected phenotype is determined by a large number of loci, so that strict assortativity is difficult; and (iii) it renders speciation less sensitive to costs of assortative mating, especially for individuals preferring rare phenotypes. 2012 published IR-12-040 IR-12-040 1240 66 public interim_report IIASA, Laxenburg, Austria 25 FALSE info:eu-repo/semantics/book