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The effects of impulsive toxicant input on a single-species population in a small polluted environment

College of Science, Harbin University of Science Technology, Harbin 150080, China

Special Issues: Modeling and Complex Dynamics of Populations

In this paper, we study a single-species population model with pulse toxicant input in a small polluted environment. The intrinsic rate of population change is affected by the environmental toxin load and toxin in the organisms which is influenced by toxin in the environment and the food chain. A new mathematical model is established. By the Pulse Compare Theorem, we find the surviving threshold of the population and obtain the sufficient conditions of persistence and extinction of the population.
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