A value, in the range 1–10, assigned to species in the Wisconsin ordination scheme and based on the species' importance values. Stands with the same leading dominants are grouped together, and importance values for all species in the group are recalculated. By comparing the changing importance of species in groups with different leading dominants, the leading dominants and then other species can be placed in phytosociological order. See also density–frequency–dominance.
Subjects: Plant Sciences and Forestry — Ecology and Conservation.