Dove A D
Department of Microbiology and Parasitology, The University of Queensland, St Lucia, Australia.
Int J Parasitol. 1999 Jun;29(6):915-20. doi: 10.1016/s0020-7519(99)00058-2.
A new index of interactivity which allows objective evaluation and comparison of interactivity in communities between different host species is presented. The index is derived from the equations for species-accumulation curves generated using non-linear regression (with the Levenberg-Marquardt algorithm) of sample infracommunity richness data. It is advantageous in that it requires only presence/absence data to calculate, is applicable to all parasite taxa (including asexual species), is largely independent of sample size and allows objective comparison of parasite communities while correcting for differences in total richness. Iterative randomisation of infracommunity richness values to generate a mean value for the index avoids spurious results which may be generated by heterogeneity in infracommunity richness and the variation this produces in the non-linear regression results.
提出了一种新的交互性指数，该指数能够对不同宿主物种群体间的交互性进行客观评估和比较。该指数源自使用样本亚群落丰富度数据的非线性回归（采用Levenberg-Marquardt算法）生成的物种累积曲线方程。其优势在于计算时仅需存在/缺失数据，适用于所有寄生虫分类群（包括无性物种），在很大程度上独立于样本大小，并且在校正总丰富度差异的同时能够对寄生虫群体进行客观比较。对亚群落丰富度值进行迭代随机化以生成该指数的平均值，可避免因亚群落丰富度的异质性及其在非线性回归结果中产生的变化而可能产生的虚假结果。
