Abstract: There are 6 genera, 19 species and 2 varieties belonging to Fagaceae, making up about 1.5% of the total spermatophyta species in the study area, but the coverage of vegetations dominated by Fagaceae makes up of 60—70%. Vegetations dominated by Fagaceae can be classified into 10 types. Their regular distribution forms a vertical vegetation spectrum. In this area, there are 6 big reserviors, all surrounded with these vegetations. They play a significant role in conserving water and soil and prolonging the service life of reserviors. Besides, a lot of precious, rare and endangered plant species are growing among these vegetations. Therefore, Fagaceae occupies an important status in forest vegetations on the north slope of Dabie Mountain.

Key words: Tetranychus urticae, Spatial pattern, Time series dynamics