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arXiv 1206.0973q-bio.PEcond-mat.stat-mech
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两种群捕食者-食饵模型中的环境与人口变化

Environmental vs. demographic variability in two-species predator-prey models

Ulrich Dobramysl, Uwe C. Tauber

摘要:

利用二维格子上的Monte Carlo模拟方法,研究了随机两种群洛特卡-沃尔泰拉模型中人口和环境变量对演化动力学的竞争效应和相对重要性.个体被分配可遗传的捕食效率;在空间变化的反应速率猝灭的随机性作为环境噪声。我们发现,环境的变化增强了捕食者和猎物的人口密度,而人口的变化导致本质上是中性的优化。

英文摘要:

We investigate the competing effects and relative importance of intrinsic demographic and environmental variability on the evolutionary dynamics of a stochastic two-species Lotka-Volterra model by means of Monte Carlo simulations on a two-dimensional lattice. Individuals are assigned inheritable predation efficiencies; quenched randomness in the spatially varying reaction rates serves as environmental noise. We find that environmental variability enhances the population densities of both predators and prey while demographic variability leads to essentially neutral optimization.

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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