Effects of branching spatial structure and life history on the asymptotic growth rate of a population

被引:0
作者
Emma E. Goldberg
Heather J. Lynch
Michael G. Neubert
William F. Fagan
机构
[1] University of Maryland,Department of Biology
[2] University of Illinois at Chicago,Department of Biological Sciences
[3] Woods Hole Oceanographic Institution,Biology Department
来源
Theoretical Ecology | 2010年 / 3卷
关键词
Metapopulation; Dispersal bias; Spatial ecology; Eigenvector analysis;
D O I
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中图分类号
学科分类号
摘要
The dendritic structure of a river network creates directional dispersal and a hierarchical arrangement of habitats. These two features have important consequences for the ecological dynamics of species living within the network. We apply matrix population models to a stage-structured population in a network of habitat patches connected in a dendritic arrangement. By considering a range of life histories and dispersal patterns, both constant in time and seasonal, we illustrate how spatial structure, directional dispersal, survival, and reproduction interact to determine population growth rate and distribution. We investigate the sensitivity of the asymptotic growth rate to the demographic parameters of the model, the system size, and the connections between the patches. Although some general patterns emerge, we find that a species’ modes of reproduction and dispersal are quite important in its response to changes in its life history parameters or in the spatial structure. The framework we use here can be customized to incorporate a wide range of demographic and dispersal scenarios.
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页码:137 / 152
页数:15
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