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Competition and Dispersal Delays in Patchy Environments

1. Department of Mathematics and Statistics, University of Victoria, PO BOX 3045 STN CSC, Victoria, B.C. V8W 3P4

Dispersal delays are introduced into a competition model for two species that disperse among $n$ identical patches. The model is formulated as a system of integro-differential equations with an arbitrary distribution of dispersal times between patches. By identifying steady states and analyzing local stability, conditions for competitive exclusion, coexistence or extinction are determined in terms of the system parameters. These are confirmed by numerical simulations with a delta function distribution, showing that all solutions approach a steady state and that high dispersal is generally a disadvantage to a species. However, if the two species have identical local dynamics, then small dispersal rates (with certain parameter restrictions) can be an advantage to the dispersing species. If the number of species is increased to three, then oscillatory coexistence with dispersal delay is possible.
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Keywords coexistence; dispersal delay; competition; patch model; stability.

Citation: Nancy Azer, P. van den Driessche. Competition and Dispersal Delays in Patchy Environments. Mathematical Biosciences and Engineering, 2006, 3(2): 283-296. doi: 10.3934/mbe.2006.3.283


This article has been cited by

  • 1. Petra Klepac, Michael G. Neubert, P. van den Driessche, Dispersal delays, predator–prey stability, and the paradox of enrichment, Theoretical Population Biology, 2007, 71, 4, 436, 10.1016/j.tpb.2007.02.002

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