Multilevel selection in a gradient

Angelo Valleriani and Torsten Meene

Ecological Modelling, 2007, vol. 208, issue 2, 159-164

Abstract: In this study we consider a population subdivided in groups. Each group is connected to two neighboring groups by means of migration channels. The migration channels are used with different probability, according to a gradient that gives a preferential direction of colonization. Within groups we have a fast population dynamics modeled with a Moran process. Between groups we have a process of colonization selection at low migration rate, based on the propagule model. We consider resident and invading individuals, with the invading individuals having a relative fitness r. Groups composed only of invaders will also have a relative group fitness R. We show that, independently of the value of r, a strong gradient reduces the advantage of groups with large fitness and thus works against group selection.

Keywords: Group selection; Multilevel selection; Gradient; Evolution; Moran process; Meta-population; Ecology; Population structure; Networks (search for similar items in EconPapers)
Date: 2007
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Persistent link: https://EconPapers.repec.org/RePEc:eee:ecomod:v:208:y:2007:i:2:p:159-164

DOI: 10.1016/j.ecolmodel.2007.05.017

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