JSM 2005 - Toronto

Abstract #302925

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Legend: = Applied Session, = Theme Session, = Presenter
Activity Number: 134
Type: Contributed
Date/Time: Monday, August 8, 2005 : 10:30 AM to 12:20 PM
Sponsor: Biometrics Section
Abstract - #302925
Title: How Many Species and How Many Rare Species?
Author(s): Hongmei Zhang*+
Companies: University of West Florida
Address: Rm 113 Bldg 38, Pensacola, FL, 32514, United States
Keywords: Generalized multinomial model ; Bayesian ; MCMC ; species
Abstract:

This talk focuses on estimating the number of species and the number of abundant species in a specific region. In areas such as biology, ecology, and literature, the frequency distribution is severely skewed (i.e., the population contains few very abundant species and many rare ones). An asymmetric Dirichlet-multinomial probability model for species frequency data is developed to explain such situations. Posterior distributions on the number of species and abundant species are then obtained and posterior inferences are induced. Simulations are used to demonstrate and evaluate the developed methodology. We apply the method to DNA segment and butterfly datasets. Comparisons among approaches also will be discussed.

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Revised March 2005