| 空间非齐次性和扩散行为对种群规模的影响 |
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| 引用本文： | 唐成千, 徐本龙.空间非齐次性和扩散行为对种群规模的影响[J].上海师范大学学报(自然科学版),2011,40(3):235-239. |
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| 作者姓名： | 唐成千 徐本龙 |
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| 作者单位： | 上海师范大学数理学院,上海,200234 |
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| 基金项目： | 上海市教委基金(10YZ77) |
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| 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.
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| 关 键 词： | 扩散 种群规模 空间的非齐次 |
Effects of spatial heterogeneity and diffusion behavior on biological population sizes |
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| TANG Cheng-qian,XU Ben-long.Effects of spatial heterogeneity and diffusion behavior on biological population sizes[J].Journal of Shanghai Normal University(Natural Sciences),2011,40(3):235-239. |
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| Authors: | TANG Cheng-qian XU Ben-long |
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| Institution: | TANG Cheng-qian,XU Ben-long(College of Mathematics and Sciences,Shanghai Normal University,Shanghai 200234,China) |
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| 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. |
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| Keywords: | diffusion biological population size spatial heterogeneity |
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