Supplement 1. The code for WinBUGS models, an example data set (Mexican butterfly diversity), and an R interface that will allow the user to fit the compound distributions described in the paper to small data sets.

File List Gamma3.odc - Poisson-Gamma WinBUGS model lognorm3.odc - Poisson log-Normal WinBUGS model testbugs.txt - Data set consisting of four sites with fifty species divmodels.R - Script for running the models from R, including tcltk graphical user interface README.txt - Instructions for setting up and running the models divbugs.zip - All five files together Description The scripts provided allow the user to fit the compound distributions described in the paper to small data sets consisting of counts of individuals and estimate confidence intervals for some commonly used diversity indices. Names used for indices and model parameters should be self explanatory. The files make use of WinBUGS and R. Both are freely available from the Internet.