American Institute of Mathematical Sciences

Advanced
2006, 3(2): 283-296. doi: 10.3934/mbe.2006.3.283

Competition and Dispersal Delays in Patchy Environments

Nancy Azer 1, and  P. van den Driessche 1,

1. 

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

Received  July 2005 Revised  January 2006 Published  February 2006

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.
Keywords: coexistence, dispersal delay, competition, patch model, stability..
Mathematics Subject Classification: 92D40, 34K2.
Citation: Nancy Azer, P. van den Driessche. Competition and Dispersal Delays in Patchy Environments. Mathematical Biosciences & Engineering, 2006, 3 (2) : 283-296. doi: 10.3934/mbe.2006.3.283
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