高等动物捕食对赤潮藻类模型非线性动力学行为的影响

Effect of predation of zooplankton on the nonlineardynamics of habs population model

针对多种群赤潮藻类的生态系统,运用非线性动力学理论,研究了高等动物捕食行为对该系统所产生的复杂动力学行为的影响。结果发现:藻类生态系统对高等动物的捕食有很强的敏感性,后者加剧了前者的复杂动力学行为的变化,在考虑生态系统模型的建立时,高等动物的捕食及其转化率是两个非常重要的因素。

In this paper, a food chain made up with two typical algae and zooplankton is considered. Using the methods of the modern nonlinear dynamics. Discussion on the bifurcation behaviors and stability of the model equations for the predation of zooplankton was made. The result is that the population dynamics of the ecological system are very sensitive to the maximum grazing rate and growth efficiency. The result obtained using the theory of dynamical systems enhances our knowledge of the factors, which governs the dynamics of plankton population models.