Landscape Ecology

, Volume 21, Issue 6, pp 837–848

Colonisation as a common denominator in plant metapopulations and range expansions: effects on genetic diversity and sexual systems

Research Article

Abstract

Colonisation plays a central role in both the initial occupancy of a region through range expansions as well as in metapopulations, where local extinctions are balanced by re-colonisations. In this paper, we review the effects that colonisation is expected to have on patterns of genetic variation within a species, and we draw attention to the possibility of interpreting these patterns as signatures of colonisation in the past. We briefly review theoretical predictions for the effect of colonisation on both neutral genetic diversity and on variation at genetic loci that regulate the sexual system of plant populations. The sexual system represents a particularly important trait in this context because it is affected by both selection during colonisation, and because it influences gene flow amongst populations. Finally, we introduce four case studies of plant species that show variation in their sexual systems that is consistent with theoretical predictions.

Keywords

Androdioecy Baker’s Law Colonisation Dioecy FST Genetic diversity Metapopulation dynamics Monoecy Population subdivision Range expansion Self-compatibility Tristyly 

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Copyright information

© Springer 2006

Authors and Affiliations

  1. 1.Department of Plant SciencesUniversity of OxfordOxfordUK

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