Lindström Torsten
Department of Technology, University of Kalmar, S-39182 Kalmar, Sweden.
J Math Biol. 2002 Nov;45(5):396-418. doi: 10.1007/s002850200154.
In this paper we derive and analyze a discrete version of Rosenzweig's (Am. Nat. 1973) food-chain model. We provide substantial analytical and numerical evidence for the general dynamical patterns of food chains predicted by De Feo and Rinaldi (Am. Nat. 1997) remaining largely unaffected by this discretization. Our theoretical analysis gives rise to a classification of the parameter space into various regions describing distinct governing dynamical behaviors. Predator abundance has a local optimum at the edge of chaos.
在本文中,我们推导并分析了罗森茨维格(《美国博物学家》,1973年)食物链模型的离散形式。我们提供了大量的分析和数值证据,表明德费奥和里纳尔迪(《美国博物学家》,1997年)所预测的食物链一般动态模式在很大程度上不受这种离散化的影响。我们的理论分析将参数空间划分为不同区域,这些区域描述了不同的主导动态行为。捕食者数量在混沌边缘存在局部最优值。