论文标题
竞争和随机事件的物种种群动态
Species Population Dynamics with Competition and Random Events
论文作者
论文摘要
分析了在随机事件的影响下的竞争性两种系统系统的种群动力学，并介绍了这两个物种的稳态种群平均值，波动和交叉相关的表达。结果表明，随机事件导致每个规格的人口平均值使从远至远高于其增长率阈值的平稳过渡。同时，较弱规格的人口平均值从未达到灭绝点。还表明，由于竞争，由于两个物种的增长率远高于其各自的阈值，因此相对种群波动不会消失。在最大竞争点，这种行为是最引人注目的，即较弱的规格人口统计数据变得完全混乱，而不管其升高的增长率如何。
Population dynamics of a competitive two-species system under the influence of random events are analyzed and expressions for the steady-state population mean, fluctuations, and cross-correlation of the two species are presented. It is shown that random events cause the population mean of each specie to make smooth transition from far above to far below of its growth rate threshold. At the same time, the population mean of the weaker specie never reaches the extinction point. It is also shown that, as a result of competition, the relative population fluctuations do not die out as the growth rates of both species are raised far above their respective thresholds. This behavior is most remarkable at the maximum competition point where the weaker specie's population statistics becomes completely chaotic regardless of how far its growth rate in raised.
