A nonparametric estimator of species overlap

被引:28
作者
Yue, JC
Clayton, MK
Lin, FC
机构
[1] Natl Chengchi Univ, Dept Stat, Taipei 11623, Taiwan
[2] Univ Wisconsin, Dept Stat, Madison, WI 53706 USA
关键词
bootstrap; Jaccard's index; maximum likelihood estimator; similarity index; species diversity;
D O I
10.1111/j.0006-341X.2001.00743.x
中图分类号
Q [生物科学];
学科分类号
07 ; 0710 ; 09 ;
摘要
For two communities, species overlap has been defined by Smith, Solow, and Preston (1996, Biometrics 52, 1472-1477) as the probability that a randomly selected species is present in both communities given that it is present in at least one community. Species overlap can thus be used to describe the similarity of two communities. In contrast with the parametric estimator of Smith et al., we propose a nonparametric maximum likelihood estimator (NPMLE). We prove that the NPMLE is consistent and asymptotically normally distributed and show that computation of the NPMLE and its standard error is straightforward. We also compare the NPMLE and the estimator of Smith et al. for a variety of situations.
引用
收藏
页码:743 / 749
页数:7
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