local abundance is the relative representation of a species in a particular ecosystem. It is usually measured as the number of individuals found per sample. ... Relative species abundance is calculated by dividing the number of species from one group by the total number of species from all groups.
examples:
density, number of breeding pairs, biomass, basal area, frequency, cover, territorial area, presence. Density: number of individuals per unit area or volume.
ordination.okstate.edu › abund