环境污染下具有脉冲毒素投放的两种群竞争系统持久性

Persistence of a Two-species Competition System in a Polluted Environment with Impulsive Toxicant Input

主要研究环境污染中具有脉冲投放毒素的两种群竞争系统,利用比较原理讨论了两种群体内毒素不同时,脉冲投放毒素对竞争系统的影响,得到了种群弱持续生存和灭绝的阈值条件.

This paper is to investigate persistence of a Lotka-Volterra competition system in a polluted environment with impulsive toxicant input at fixed moments,in which two species have different concentrations of the toxicant. The effects of impulsive toxicant input with a constant rate on two-species Lotka-Volterra competition system are considered, and the thresholds between persistence and extinction of each population are obtained.