| 有性生殖与食者—被食者体系中的极限环 |
| |
| 引用本文： | 郑久仁.有性生殖与食者—被食者体系中的极限环[J].生态学杂志,1996,15(5):70-75. |
| |
| 作者姓名： | 郑久仁 |
| |
| 作者单位： | 中国科学技术大学基础物理中心!合肥230026 |
| |
| 摘 要： | 1 引 言种群生物学的原始假设认为,在一定条件下,任一种群,不管是有性生殖种群还是无性生殖种群,其自然增长都遵守ＶｅｒｈｕｌｓｔＰｅａｒｌＬｏｇｉｓｔｉｃ方程。按照这一方程,种群有一个平衡点Ｓ,Ｓ=Ｋ,Ｋ是环境负荷容量;并且随着种群大小(或密度)Ｎ的增加,种群的个体(或相对)自然增长率ｄＮ/Ｎｄｔ单调下降。这是由于存在拥挤效应。Ｌｏｇｉｓｔｉｃ方程不含Ａｌｌｅｅ效应或过疏效应1,2]。实际情况与Ｌｏｇｉｓｔｉｃ方程有所不同,由于存在“拥挤效应”和“过疏效应”,第一,有一个最适种群大小Ｎｍ:随着Ｎ增加,ｄＮ/Ｎｄｔ在Ｎ<Ｎ…
|
| 关 键 词： | 种群生态学 有性生殖 食者被食者体系 极限环 |
Sexual Reproduction and Limit Cycles in Predator-Prey Systems. |
| |
| Zheng Jiuren.Sexual Reproduction and Limit Cycles in Predator-Prey Systems.[J].Chinese Journal of Ecology,1996,15(5):70-75. |
| |
| Authors: | Zheng Jiuren |
| |
| 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=N 2g b(N)=bN 2(1-uN w 1N 2),(dN/dt) d=Ng d(N)=dN(1 vN w 2N 2). 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 S and unstable X, S>X, an asexual population can only have one equilibrium point, i.e. stable S. |
| |
| Keywords: | sexual reproduction BMMR model predator-preysystem limit cycle equilibrium point |
| 本文献已被 CNKI 维普 等数据库收录！ |
|
