Estimating species richness by a Poisson-compound gamma model
- 22 June 2010
- journal article
- research article
- Published by Oxford University Press (OUP) in Biometrika
- Vol. 97 (3) , 727-740
- https://doi.org/10.1093/biomet/asq026
Abstract
We propose a Poisson-compound gamma approach for species richness estimation. Based on the denseness and nesting properties of the gamma mixture, we fix the shape parameter of each gamma component at a unified value, and estimate the mixture using nonparametric maximum likelihood. A least-squares crossvalidation procedure is proposed for the choice of the common shape parameter. The performance of the resulting estimator of N is assessed using numerical studies and genomic data.Keywords
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