由于种内互助作用的存在及食植者采食速率、食植者密度等因子的影响，牧草植物种群存在多个稳定平衡点。
There are multiplicity of stable states in herbage populations owing to the influences of intraspecific mutualism, feeding rate and density of herbivores.
构造了一个具有阶段结构的捕食—食饵模型，并研究了庇护所效应对于该系统平衡点的稳定性、平衡密度及其种群长期续存的影响。
This paper studied the effect of prey refuges on the stage-structured predator-prey model with two life stages-immature and mature, and with a mature prey using refuges.
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