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Pattern Formation in Populations with Density-Dependent Movement and Two Interaction Scales

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  • Ricardo Martínez-García
  • Clara Murgui
  • Emilio Hernández-García
  • Cristóbal López

Abstract

We study the spatial patterns formed by a system of interacting particles where the mobility of any individual is determined by the population crowding at two different spatial scales. In this way we model the behavior of some biological organisms (like mussels) that tend to cluster at short ranges as a defensive strategy, and strongly disperse if there is a high population pressure at large ranges for optimizing foraging. We perform stochastic simulations of a particle-level model of the system, and derive and analyze a continuous density description (a nonlinear diffusion equation). In both cases we show that this interplay of scale-dependent-behaviors gives rise to a rich formation of spatial patterns ranging from labyrinths to periodic cluster arrangements. In most cases these clusters have the very peculiar appearance of ring-like structures, i.e., organisms arranging in the perimeter of the clusters, which we discuss in detail.

Suggested Citation

  • Ricardo Martínez-García & Clara Murgui & Emilio Hernández-García & Cristóbal López, 2015. "Pattern Formation in Populations with Density-Dependent Movement and Two Interaction Scales," PLOS ONE, Public Library of Science, vol. 10(7), pages 1-14, July.
    • Handle: RePEc:plo:pone00:0132261
    DOI: 10.1371/journal.pone.0132261
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    References listed on IDEAS

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    1. W. R. Young & A. J. Roberts & G. Stuhne, 2001. "Reproductive pair correlations and the clustering of organisms," Nature, Nature, vol. 412(6844), pages 328-331, July.
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