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arXiv 0907.5382math.DSq-bio.PE
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食饵扩散和Allee效应下的捕食者-食饵相互作用

Predator-Prey Interactions in Communities with prey dispersal and Allee effects

F. Berezovskaya, S. Wirkus, C. Castillo-Chavez

摘要:

种群动力学的捕食者-猎物系统中存在的补丁特定的捕食者的猎物人口有机会进入这两个栖息地的设置进行了探讨。重点是在补丁猎物丰富驱动补丁之间的猎物扩散的情况下,与脆弱的猎物种群,即人口受Allee效应。由此产生的四维模型的数学分析是通过子模型,重点在较低的维度设置。结果取决于,事实上,它们对系统的结构,参数值的范围和初始条件非常敏感。我们表明,该系统可以支持多稳定性和多样的捕食者-猎物的生活史动态,其中包括相当复杂的动力系统的结果。有人认为,在一般的进化应该有利于异质设置,包括Allee效应,猎物避难所,和补丁特定的捕食者。

英文摘要:

The population dynamics of predator-prey systems in the presence of patch-specific predators are explored in a setting where the prey population has access to both habitats. The emphasis is in situations where patch-prey abundance drives prey-dispersal between patches, with the fragile prey populations, that is, populations subject to the Allee effect. The resulting four-dimensional model's mathematical analysis is carried out via sub-models that focus in lower dimensional settings. The outcomes depend on, and in fact they are quite sensitive to, the structure of the system, the range of parameter values, and initial conditions. We show that the system can support multi-stability and a diverse set of predator-prey life-history dynamics that includes rather complex dynamical system outcomes. It is argued that in general evolution should favor heterogeneous settings including Allee effects, prey-refuges, and patch-specific predators.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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