论文信息 - AN ESTIMATOR OF SPECIES OVERLAP USING A MODIFIED BETA-BINOMIAL MODEL

AN ESTIMATOR OF SPECIES OVERLAP USING A MODIFIED BETA-BINOMIAL MODEL

A new species overlap measure is defined as the probability that, given a randomly selected species is present in at least one of the two communities, it is present in both communities. This measure can be thought of as a community analog of the Jaccard index for species overlap between two samples. Standard maximum likelihood methods are used to estimate the parameters of a modified beta-binomial' distribution. This leads directly to estimates of the community overlap measure. In an example from decapod communities on coral reefs, it is shown that this new estimate of community species overlap is 50% larger than the commonly used Jaccard measure of species overlap.

A. Solow | Woollcott Smith | P. E. Preston

[1] Luis A. Escobar,et al. Teaching about Approximate Confidence Regions Based on Maximum Likelihood Estimation , 1995 .

[2] Andrew R. Solow,et al. On the Bayesian Estimation of the Number of Species in a Community , 1994 .

[3] A. W. Kemp,et al. Univariate Discrete Distributions , 1993 .

[4] J. Bunge,et al. Estimating the Number of Species: A Review , 1993 .

[5] Bruce G. Lindsay,et al. Computer-assisted analysis of mixtures (C.A.MAN) statistical algorithms , 1992 .

[6] Peter J. Danaher,et al. PARAMETER ESTIMATION AND APPLICATIONS FOR A GENERALISATION OF THE BETA‐BINOMIAL DISTRIBUTION , 1988 .

[7] A. F. Smith,et al. Statistical analysis of finite mixture distributions , 1986 .

[8] John C. Gower,et al. Measures of Similarity, Dissimilarity and Distance , 1985 .

[9] S. Engen,et al. Stochastic abundance models. , 1978 .