为研究生境修复对生态系统产生的影响, 文章建立了一类在生境破坏情况下, 具有~Monod-Haldane~功能反应, 脉冲比例收获和脉冲常数投放的四种群食饵--捕食者模型. 利用脉冲比较定理, Floquent~理论及微小扰动法研究了系统的动力学性质, 并给出系统中两食饵灭绝和种群持续生存的充分条件. 最后, 通过数值模拟验证了所得结论. 结果显示系统存在一定脆弱性和复杂性, 随着生境修复比率和捕食者投放比率的变化, 系统将出现拟周期, 混沌等复杂的动力学现象. 环境修复作用对系统影响的复杂性, 也体现了生境修复的重要性.

In order to investigate the influence of habitat restoration on the ecological system, we have established a dynamical of a four-species prey-predator impulsive system with a Monod-Haldane function response, impulsive ration harvest and impulsive release. Basing on the strategy of integrated biology management, the frequent theorem and the amplitude perturbation skill, we give the sufficient conditions for the system of the preys to be extinct and permanence. Finally, we verified the conclusion by numerical simulation. The results showed some vulnerability and complexity. The system will have more complex dynamics including periodic doubling bifurcation, chaos, periodic halving bifurcation and so on with the change of the immigration and habitat restoration ratio. This also reflects the importance of habitat restoration.