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Quantitative assessment of multispecies spatial pattern with high species diversity

机译：具有高物种多样性的多物种空间格局的定量评估

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This paper developed statistical methods for quantitatively assessing spatial pattern of communities with abundant species richness such as in tropical forests. Based on multivariate point processes, species richness and the Simpson's diversity index can be extended to the functions illustrating basic characteristics of multispecies spatial pattern. The spatial extension of the species richness is a sum of the detectabilities of constituent species within a given distance. By means of calculating the functions for individuals belonging to specific size class, the size structure of multispecies spatial pattern can also be examined. Therefore, comprehensive analysis of species, size, and spatial pattern together with the roles of each species in a community can be conducted. This paper demonstrated its descriptive utility in exploratory analysis by applications to four subtropical forest tree communities of different ages in Okinawa Island, southern Japan, all of which have abundant species richness. The results quantitatively revealed the contrasts among the four stands ranging from a young secondary stand to an old-growth forest as well as changes of relative positions of species in communities depending on their ecologic properties.
机译：本文开发了用于定量评估物种丰富度较高的群落（例如热带森林）的空间格局的统计方法。基于多元点过程，物种丰富度和辛普森多样性指数可以扩展到说明多元物种空间格局基本特征的功能。物种丰富度的空间扩展是给定距离内组成物种可检测性的总和。通过计算属于特定大小类别的个体的函数，还可以检查多物种空间格局的大小结构。因此，可以对物种，大小和空间格局以及每种物种在社区中的作用进行全面分析。本文通过对日本南部冲绳岛的四个不同年龄的亚热带林木群落的应用，证明了其在探索性分析中的描述性实用性，它们都具有丰富的物种丰富性。结果定量地揭示了从幼小次生林到旧林这四个林分之间的对比，以及群落中物种相对位置的变化取决于其生态特性。

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