ComDyn - Community Dynamics

COMDYN was developed to estimate parameters associated with community dynamics using presence/absence data from 2 locations or time periods. The basic estimator for species richness underlying all estimators is the jackknife estimator proposed by Burnham and Overton (1979; Ecology 60:927-936). Application of this estimator to species richness estimation is described and justified by Boulinier, Nichols, Sauer, Hines, and Pollock ("Estimating species richness : the importance of heterogeneity in species detectability, Ecology [1998] 79:1018-1028). The estimators for community-dynamic parameters and their variances are presented by Nichols, Boulinier, Hines, Pollock, and Sauer (" Inference methods for spatial variation in species richness and community composition when not all species are detected, Conservation Biology, in press; Estimating rates of local species extinction, colonization and turnover in animal communities, Ecological Applications [1998] 8:1213-1225).