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Null Model Analysis Of Species Associations Using Abundance Data, Werner Ulrich, Nicholas J. Gotelli
Null Model Analysis Of Species Associations Using Abundance Data, Werner Ulrich, Nicholas J. Gotelli
College of Arts and Sciences Faculty Publications
The influence of negative species interactions has dominated much of the literature on community assembly rules. Patterns of negative covariation among species are typically documented through null model analyses of binary presence/absence matrices in which rows designate species, columns designate sites, and the matrix entries indicate the presence (1) or absence (0) of a particular species in a particular site. However, the outcome of species interactions ultimately depends on population-level processes. Therefore, patterns of species segregation and aggregation might be more clearly expressed in abundance matrices, in which the matrix entries indicate the abundance or density of a species in …