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• W1992899726 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 >/=1. 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." @default.
• W1992899726 created "2016-06-24" @default.
• W1992899726 creator A5043437297 @default.
• W1992899726 creator A5051515473 @default.
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• W1992899726 date "2002-02-01" @default.
• W1992899726 modified "2023-09-25" @default.
• W1992899726 title "Patchy Populations in Stochastic Environments: Critical Number of Patches for Persistence" @default.
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• W1992899726 doi "https://doi.org/10.1086/324793" @default.
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