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Effect of Spatial Dispersion on Evolutionary Stability: A Two-Phenotype and Two-Patch Model

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  • Qing Li
  • Jiahua Zhang
  • Boyu Zhang
  • Ross Cressman
  • Yi Tao

Abstract

In this paper, we investigate a simple two-phenotype and two-patch model that incorporates both spatial dispersion and density effects in the evolutionary game dynamics. The migration rates from one patch to another are considered to be patch-dependent but independent of individual’s phenotype. Our main goal is to reveal the dynamical properties of the evolutionary game in a heterogeneous patchy environment. By analyzing the equilibria and their stabilities, we find that the dynamical behavior of the evolutionary game dynamics could be very complicated. Numerical analysis shows that the simple model can have twelve equilibria where four of them are stable. This implies that spatial dispersion can significantly complicate the evolutionary game, and the evolutionary outcome in a patchy environment should depend sensitively on the initial state of the patches.

Suggested Citation

  • Qing Li & Jiahua Zhang & Boyu Zhang & Ross Cressman & Yi Tao, 2015. "Effect of Spatial Dispersion on Evolutionary Stability: A Two-Phenotype and Two-Patch Model," PLOS ONE, Public Library of Science, vol. 10(11), pages 1-15, November.
    • Handle: RePEc:plo:pone00:0142929
    DOI: 10.1371/journal.pone.0142929
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