Research On The Structure Characteristic Of Arthropod Community

On the basis of investigation 4t was dealt with the static and dynamic characters of the arthropod communities in two different type jujube yards in Shanxi agriculture university. There were 114species of arthropods that belong to 88 families and 13 orders.The proportion of individual of every functional group shows that the phytophagous group is the largest, the parasitoid group is the smallestA number of community parameters were used to analyze and explore the succession regularity in the arthropod community of jujube yards. The diversity index relative diversity value richness index evenness index reduced from the old jujube yard of complicated environment are higher than those in young jujube yards. The difference of community structure in two different type jujube yards was principally caused by the different growth years of jujube trees and the complicated ecological environment.The results of stepwise multiple reggrssion of the arthropod community parameters presented that the principal component affecting diversity of phytophagous, predatory and parasitoid arthropod group was individual number in old jujube yard The principal component affecting diversity of phytophagous and predatory arthropod group was evenness in young jujube yard. The principal component analysis method was used to study the main factors of the arthropod communities. The results showed that the accumulative contribution rate of the 1st and 2nd principal component all were beyond 85 percent The time dynamics of arthropod in two kinds of jujube yards were analyzed using system cluster analysis. The results show that the whole communities of arthropod were divided into three phases which are transition and withdraw phase, flouring phase and patch phase except for June.