Spatial variability enhances species fitness in stochastic predator-prey interactions

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We study the influence of spatially varying reaction rates on a spatial stochastic two-species Lotka-Volterra lattice model for predator-prey interactions using two-dimensional Monte Carlo simulations. The effects of this quenched randomness on population densities, transient oscillations, spatial correlations, and invasion fronts are investigated. We find that spatial variability in the predation rate results in more localized activity patches, which in turn causes a remarkable increase in the asymptotic population densities of both predators and prey, and accelerated front propagation.
4 pages, 3 figures, to appear in Phys. Rev. Lett

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Statistical Mechanics, Populations and Evolution

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http://salesiana.dossiersoluciones.com/handle/123456789/211195

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/0804.4127
 http://arxiv.org/abs/0804.4127
 Phys. Rev. Lett. 101 (2008) 258102
 doi:10.1103/PhysRevLett.101.258102

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arXiv