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生态学杂志 ›› 1996, Vol. ›› Issue (5): 70-75.

• 研究报告 • 上一篇    下一篇

有性生殖与食者-被食者体系中的极限环

郑久仁   

  1. 中国科学技术大学基础物理中心, 合肥 230026
  • 收稿日期:1995-08-30 出版日期:1996-10-10

Sexual Reproduction and Limit Cycles in Predator-Prey Systems

Zheng Jiuren   

  1. Center for Fundamental Physics, University of Science and Technology of China, Hefei 230026
  • Received:1995-08-30 Online:1996-10-10

关键词: 彰武松, 樟子松, 盐碱胁迫, 生理指标

Abstract: Based on sexual reproduction and birth matrix-mating rule model (BMMR model), the following representatives of birth and death rates of sexual population were obtained: (dN/dt)b=N2gb(N)=bN2(1-uN+w1N2),(dN/dt)d=Ngd(N)=dN(1+vN+w2N2). Tus predator-prey system can present limit cycles with cusp geometry. The sexual population has humped curves of natural increase rate of individuals as function of population size and two equilibrium points: stable Sand unstable X, S>X, an asexual population can only have one equilibrium point, i.e. stable S.

Key words: Pinus densiflora var. zhangwuensis, Pinus sylvestris var. mongolica, salt-alkali stress, physiological indices.