Competition and coexistence in regional habitats

The American Naturalist
Zong-Ling WangMing-Yuan Zhu

Abstract

Habitat heterogeneity plays a key role in the dynamics and structures of communities. In this article, a two-species metapopulation model that includes local competitive dynamics is analyzed to study the population dynamics of two competing species in spatially structured habitats. When local stochastic extinction can be ignored, there are, as in Lotka-Volterra equations, four outcomes of interspecific competition in this model. The outcomes of competition depend on the competitive intensity between the competing pairs. An inferior competitor and a superior competitor, or two strongly competing species, can never stably coexist, whereas two weak competitors (even if they are very similar species) may coexist over the long term in such environments. Local stochastic extinction may greatly affect the outcomes of interspecific competition. Two competing species can or cannot stably coexist depending not only on the competitive intensity between the competing pairs but also on their precompetitive distributions. Two weak competitors that have similar precompetitive distributions can always regionally coexist. Two strongly competing species that competitively exclude each other in more stable habitats may be able to stably coexist i...Continue Reading

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Citations

Mar 2, 2006·Risk Analysis : an Official Publication of the Society for Risk Analysis·Andrew M DeinesWayne G Landis
Nov 5, 2019·Journal of the Science of Food and Agriculture·Olja ŠovljanskiSiniša Markov
Feb 3, 2007·International Journal of Systematic and Evolutionary Microbiology·A GhoshR K Jain

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