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arXiv 0804.4127cond-mat.stat-mechq-bio.PE
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空间变异增强随机捕食者-食饵相互作用中的物种适应度

Spatial variability enhances species fitness in stochastic predator-prey interactions

Ulrich Dobramysl, Uwe C. Tauber

摘要:

利用二维蒙特卡罗模拟研究了空间变化的反应速率对空间随机两种群Lotka-Volterra格子模型的影响.这种猝灭的随机性对人口密度,瞬态振荡,空间相关性和入侵锋的影响进行了研究。我们发现,在捕食率的空间变异导致更多的本地化活动补丁,这反过来又会导致一个显着增加的渐近种群密度的捕食者和猎物,加速前传播。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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