Abstract: The comparative study on the structural similarity of arthropod communities in pure Pinus elliottii forest(P), mixed Pinus elliottii and Schima Superba forest (M₁) and mised Pinus elliottii and Acacia auriculaeformis forest (M₂) shows that M₁and M₂ have the similar arthropod communitites, but different from P. The structures of their canopy and shrub-herb layer are also dissimilar. The analysis methods used in this study can better reflect the structural similarity, dissimilarity and continuity of the arthropod communities in different habitats, and fuzzy clustering is more effective than systematic clustering.

Key words: Pine forest, Arthropod community, Structure similarity, Cluster, Ordination, heavy metal, Cinnamomum camphora, pollution gradient, soil, enrichment efficiency