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arXiv 1209.3591q-bio.PEcond-mat.stat-mechphysics.bio-ph
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空间聚集和跨尺度的种-面积关系

Spatial aggregation and the species-area relationship across scales

Jacopo Grilli, Sandro Azaele, Jayanth R Banavar, Amos Maritan

摘要:

在了解和量化物种在不同生态系统中的空间分布方面,已经做出了相当大的努力。相对物种多度(RSA)、β多样性和种-面积关系(SAR)是描述森林植物群落最常用的宏观生态学指标。在这篇文章中,我们介绍了一个简单的现象学模型的基础上泊松集群过程,使我们能够准确地链接RSA和β多样性SAR。该框架是空间明确的,占同种个体的空间聚集。根据中性学说〈动〉<动>,我们推导出一个解析表达式的SAR再现三相行为的样本面积增加,从本地到大陆尺度,解释如何三相行为可以理解的简单的几何参数。我们还找到了一个表达式的地方病地区的关系()和缩放的RSA。

英文摘要:

There has been a considerable effort to understand and quantify the spatial distribution of species across different ecosystems. Relative species abundance (RSA), beta diversity and species area relationship (SAR) are among the most used macroecological measures to characterize plants communities in forests. In this article we introduce a simple phenomenological model based on Poisson cluster processes which allows us to exactly link RSA and beta diversity to SAR. The framework is spatially explicit and accounts for the spatial aggregation of conspecific individuals. Under the simplifying assumption of neutral theory, we derive an analytical expression for the SAR which reproduces tri-phasic behavior as sample area increases from local to continental scales, explaining how the tri-phasic behavior can be understood in terms of simple geometric arguments. We also find an expression for the endemic area relationship (EAR) and for the scaling of the RSA.

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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