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作 者 ：王宁星,艾保全,张学荣

期 刊 ：生态学报 2008年 28卷 3期 页码：1059~1063

关键词：捕食者-被捕食者系统；动态模型；演化；干扰；

Keywords:predator-prey system, dynamic model, evolvement, environmental fluctuations,

摘 要 ：建立了在干扰条件下捕食者与被捕食者系统动态模型，得出系统的演化方程和演化曲线及演化相图，分别讨论了无干扰和有干扰影响情况下物种的演化情况，说明考虑了干扰后的模型更为合理，也更有利于物种的进化和新物种的产生。

Abstract:A dynamic model with the consideration of environmental fluctuations for predator-prey systems is developed. Evolvement curves and phase diagrams are obtained from the model. The system evolvement with and without environmental fluctuations is discussed and compared. The modeling results show that environmental fluctuations may induce species evolution and bring new species into the predator-prey system. Our study strongly suggests that the model can significantly improve the description of predator-prey system dynamics by considering the influence of environmental fluctuations.

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