Oscillations and patterns in interacting populations of two species

Matti Peltomäki, M. Rost, M. Alava

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Interacting populations often create complicated spatiotemporal behavior, and understanding it is a basic problem in the dynamics of spatial systems. We study the two-species case by simulations of a host-parasitoid model. In the case of coexistence, there are spatial patterns leading to noise-sustained oscillations. We introduce a measure for the patterns, and explain the oscillations as a consequence of a time-scale separation and noise. They are linked together with the patterns by letting the spreading rates depend on instantaneous population densities. Applications are discussed.
Original languageEnglish
Article number050903
Pages (from-to)1-4
JournalPhysical Review E
Issue number5
Publication statusPublished - 2008
MoE publication typeA1 Journal article-refereed


  • ecological
  • interactions
  • Oscillations
  • patterns


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