JSM 2004 - Toronto

Abstract #300307

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Activity Number: 179
Type: Topic Contributed
Date/Time: Tuesday, August 10, 2004 : 8:30 AM to 10:20 AM
Sponsor: Section on Bayesian Statistical Science
Abstract - #300307
Title: Estimating Size and Composition of Biological Communities by Modeling the Occurrence of Species
Author(s): Robert M. Dorazio*+ and Andrew Royle
Companies: U.S. Geological Survey and U.S. Fish & Wildlife Service
Address: 7920 NW 71 St., Gainesville, FL, 32653,
Keywords: biodiversity ; species richness ; species composition
Abstract:

We develop a model that uses repeated observations of a biological community to estimate the number and composition of species in the community. Estimators of community-level attributes are constructed from model-based estimators of occurrence of individual species that incorporate imperfect detection of individuals. Data from the North American Breeding Bird Survey are analyzed to illustrate the variety of ecologically-important quantities that are easily constructed and estimated using our model-based estimators of species occurrence. We compute site-specific estimates of species richness that honor classical notions of species-area relationships. We suggest extensions of our model to estimate maps of occurrence of individual species and to compute inferences related to the temporal and spatial dynamics of biological communities.

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