Oscillations and patterns in interacting populations of two species

Autor:	Peltomaki, Matti, Rost, Martin, Alava, Mikko
Rok vydání:	2008
Předmět:	Quantitative Biology - Populations and Evolution
Zdroj:	Physical Review E 78, 050903(R) (2008)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevE.78.050903
Popis:	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 co-existence, there are spatial patterns leading to noise-sustained oscillations. We introduce a new measure for the patterns, and explain the oscillations as a consequence of a timescale separation and noise. They are linked together with the patterns by letting the spreading rates depend on instantaneous population densities. Applications are discussed. Comment: 4 pages, 4 figures, accepted for publication in Phys. Rev. E as a Rapid Communication
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/0810.4839 Zobrazit plný text záznamu View this record from Arxiv