摘要
为了研究随机干扰因素与藻类生态系统稳定性之间的相互关系,运用随机非线性理论中的随机平均法和Oseledec乘性遍历定理研究了浮游动物和浮游植物构成的藻类生态系统的稳定性和分岔特性.通过对稳态概率密度的数值模拟,确定系统会发生随机Hopf分岔.研究结果表明,随机因素可以使系统稳定性发生质的变化.
To investigate the relationship between random excitation and stability of algal ecosystem, stability and bifurcation performance of an algal ecosystem consisting of zooplankton and phytoplankton was studied by using stochastic average method and Oseledec muhiplicative ergodic theory. It is certain that the system would present stochastic Hopf bifurcation through numerical simulation of the steady probability density. Results show that the stochastic factors can change the stability of the system.
出处
《天津大学学报》
EI
CAS
CSCD
北大核心
2007年第12期1507-1510,共4页
Journal of Tianjin University(Science and Technology)
基金
国家自然科学基金资助项目(10472077)
中国博士后科学基金资助项目(20060400706)
关键词
藻类生态系统
随机稳定性
随机分岔
algal ecosystem
stochastic stability
stochastic bifurcation