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Dispersal in PlantsA Population Perspective$
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Roger Cousens, Calvin Dytham, and Richard Law

Print publication date: 2008

Print ISBN-13: 9780199299126

Published to Oxford Scholarship Online: May 2008

DOI: 10.1093/acprof:oso/9780199299126.001.0001

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Propagule dispersal and the spatial dynamics of populations and communities

Propagule dispersal and the spatial dynamics of populations and communities

Chapter:
(p.135) CHAPTER 7 Propagule dispersal and the spatial dynamics of populations and communities
Source:
Dispersal in Plants
Author(s):

Roger Cousens

Calvin Dytham

Richard Law

Publisher:
Oxford University Press
DOI:10.1093/acprof:oso/9780199299126.003.0007

This chapter considers the signal of local dispersal which sits inside maps of the locations of individuals, and introduces spatial statistics as measures of spatial structure. It shows how dispersal plays a fundamental part in local population dynamics. Dispersal is also shown to have important implications for the outcome of local spatial competition between two species, the dynamics of metapopulations, and the structure of multispecies communities. Local dispersal causes clumping, slows down changes in density, and affects the asymptotic state ultimately achieved by a population. When different species compete, dispersal over greater distances gives a species an advantage which can eliminate competitive coexistence which might otherwise occur. However, in the presence of spatial environmental heterogeneity, where too much dispersal can move offspring away from favourable parts of the environment, dispersal over intermediate distances can allow faster population growth than dispersal over either short or long distances.

Keywords:   coexistence, heterogeneity, density, communities, competition, metapopulations, populations, pattern

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