Abstract: Structural relationships among species and their individuals can be revealed from all aspects by measuring different niche parameters. Multivariate statistical method can provide appropriate models for analysing H-niche, and set-theoretic method will give more informations on the mechanisms of competition, coexistence and interaction among species in a community.

Key words: Niche, Hypervolume model, Multivariate statistical method, Community niche, Changting County, assessment, level index, remote sensing, ecological vulnerability