Patchy populations in stochastic environments: Critical number of patches for persistence

Bascompte, J., Possingham, H. and Roughgarden, J. (2002) Patchy populations in stochastic environments: Critical number of patches for persistence. American Naturalist, 159 2: 128-137. doi:10.1086/324793

Attached Files (Some files may be inaccessible until you login with your UQ eSpace credentials)
Name Description MIMEType Size Downloads
UQ61217_OA.pdf Full text (open access) application/pdf 202.57KB 27

Author Bascompte, J.
Possingham, H.
Roughgarden, J.
Title Patchy populations in stochastic environments: Critical number of patches for persistence
Journal name American Naturalist   Check publisher's open access policy
ISSN 0003-0147
Publication date 2002
Sub-type Article (original research)
DOI 10.1086/324793
Open Access Status File (Publisher version)
Volume 159
Issue 2
Start page 128
End page 137
Total pages 10
Editor P. Morse
J. Travis
Place of publication Chicago, IL, United States
Publisher University of Chicago Press, Journals Division
Collection year 2002
Language eng
Subject C1
239901 Biological Mathematics
270700 Ecology and Evolution
270708 Conservation and Biodiversity
770000 - Environmental Management
Abstract We introduce a model for the dynamics of a patchy population in a stochastic environment and derive a criterion for its persistence. This criterion is based on the geometric mean (GM) through time of the spatial-arithmetic mean of growth rates. For the population to persist, the GM has to be greater than or equal to1. The GM increases with the number of patches (because the sampling error is reduced) and decreases with both the variance and the spatial covariance of growth rates. We derive analytical expressions for the minimum number of patches (and the maximum harvesting rate) required for the persistence of the population. As the magnitude of environmental fluctuations increases, the number of patches required for persistence increases, and the fraction of individuals that can be harvested decreases. The novelty of our approach is that we focus on Malthusian local population dynamics with high dispersal and strong environmental variability from year to year. Unlike previous models of patchy populations that assume an infinite number of patches, we focus specifically on the effect that the number of patches has on population persistence. Our work is therefore directly relevant to patchily distributed organisms that are restricted to a small number of habitat patches.
Keyword Biodiversity Conservation
Environmental Stochasticity
Spatially Distributed Model
Geometric Mean Fitness
Fluctuating Populations
Variable Environments
Q-Index Code C1

Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 51 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 57 times in Scopus Article | Citations
Google Scholar Search Google Scholar
Created: Tue, 14 Aug 2007, 17:03:22 EST