Structure of arthropod community in almond orchards
The arthropod community was divided into four sub-communities,phytophages.predators,parasitoids and neutralities by the standard of nutrition and hunting.The structures and dynamics of arthropod community and different sub-communities were analyzed by using a number of community parameters.The results indicated that there were 59 species of arthropod belonging to 47 families,including 37 species of phytophages representing 28 fam ilies;16 species of predators in 14 families;6 species of parasitoids-neutralities representing 5 families in almond orchards.The relative abundance of phytophages and predators were 0.98419 and 0.01446,respectively.It is suggested that the phytophages dominated the arthropod community in almond orchard.Comparing the diversities and evenness of the arthropod community in the sample of 4～9 monthes,it showed that the index of diversities fluctuated obviously.The index of diversities of May came to the highest.The results of the evenness has the same tendency.