生态系统中浑沌现象的研究概况

AN OUTLINE OF THE STUDIES OF CHAOS IN ECOLOGICAL SYSTEMS

就单种群、两种群和多种群三种情况,综述了浑沌现象的研究情况。结论是,从理论上讲,一些确定性系统在一定条件下可以表现出浑沌行为,同时讨论了对生态系统中浑沌现象研究的几种不同观点。认为浑沌是生态系统的一种重要现象,通过一定的方法(如拟合简单的差分方程模型、谱分析技术和相图重构技术)可以识别一些系统的浑沌行为。然而,方法本身还不十分完善,做出一个特定的自然生态系统是否存在浑沌这样的结论还需慎重。

This paper reviews the researches of chaos in ecological with single species, two species, and three species respectively. It is concluded that some deterministic systems show chaotic behaviors under some conditions theoretically. several viewpoints about. chaos in ecological systems is also discussed. It is believed that chaos is an important phenomena in ecological systems, and chaotic behaviors of some systems can be detected by some methods (e. g.fitting simple difference equation models, spectral analysis, and reconstructing phase protraits, etc). But these methods are not perfect yet. We need to make a conclusion that whether chaos exists in a particular natural ecological system or not.