不同迁移能力和竞争能力的集合种群竞争模式及其模拟

种群竞争是影响生态系统演化的莺要生态过程之一。本文是在徐彩琳和Tilman研究工作的基础上，将竞争系数引入集合种群动力模式，建立了集合种群之间竞争的数学模型，并对5-集合种群的竞争动态进行了计算机模拟研究。结果表明：种群竞争排除与共存受迁移扩散能力和竞争能力影响很大，排除原理在理论上是存在的，在广域集合种群和实际中物种是竞争共存的．共存的条件是其竞争能力与扩散能力呈非线性负相关关系，竞争的结果使物种的强弱序列发生变化。

Competition Models and Simulations of Metapopulations with Different Migrating and Competitive Capacities

Population competition is one of the ecological processes affecting ecosystem evolutions.Based on Xu Cai-ling and Tilman's research works,the paper establishes the mathematical model of the competition among metapopulations by integrating competition coefficient in the kinetic model of aggregate populations,and simulates the dynamic competition among five aggregate populations on computer.The results reveal that the migrating and competitive capacities of the populations exert great influence on their elimination and coexistence in the completion among them;theoretically,elimination principles exist but species competitively coexist in wide-area metapopulations and real metapopulations;the conditions of the coexistence are that their competitive capacities present to negatively correlate their migrating capacities and the results of their competition make their pecking order vary.