【摘要】 研究空间环境资源的非齐次和物种的扩散行为对于生物种群的影响.对一个单一物种的模型,结果表明:(1)空间环境的非齐次性能使种群规模变大;(2)总的种群规模会在适度的扩散速率的情况下达到最大值,而极端(过大或过小)的情形会对种群规模产生不利的影响,因此总的种群规模不是关于扩散速率的单调函数.更多还原

【Abstract】 We study the effects of spatial heterogeneity and diffusion behavior on biological populations.For the model of a single species,our study shows that(1) heterogeneity of spatial environment can enlarge population sizes;(2) the total population sizes are maximized at some intermediated diffusion rates,whereas extreme cases(too large or too small) have unfavorable impacts on them,and so the total population sizes are not non-monotone functions of diffusion rates.更多还原