Path analysis on diversity and its main ecological indices of arthropod community in tall fescue artificial grassland.

Comparative investigation of arthropod community structure in tall fescue artificial grassland,and path analysis was undertaken to study the relationship between diversity and other ecological indexes of total arthropod community and sub-communities.The results showed that diversity index H' of total community were closely related to species richness,evenness and species,dominant concentration and dominance of community increased while communities' diversity decreased,the species richness have the largest direct effect on the community's diversity,diversity index H' of non-enemy sub-community were closely related to the species richness and species,the effect of dominant concentration and dominance on communities' diversity got primarily through species and richness,similar with the total community.Non-enemy sub-community determined the structure of arthropod community;number of species in natural enemy sub-communities played a decisive role on diversity.