Abstract: To investigate the structure and species composition of urban soil arthropod community is of significance in protecting urban species diversity.In this paper,a total of 4 984 soil arthropod samples belonging to 36 genera,16 orders and 6 classes were collected from Beijing by hand-sort and Tullgren filler,among which,Acarina,Formicidae and Collembola were the dominant groups,accounting for 32.6%,27.83% and 26.91% of the total,respectively.The characteristics of soil arthropod community varied in different functional areas of Beijing.The average density of soil arthropod community was in order of park (P)> backyard of department (D)> campus (C)> industrial (I)> main traffic line (T) > residential (R),while the richness was in order of P>T>C>I>D>R.As for the arthropod in soils with different vegetation covers,its average density,richness,and diversity were in order of woodland>lawn>sidewalk trees>bare land.Soil arthropod community had a distinct vertical distribution.Both its individual numbers and genera numbers decreased with increasing soil depth.The composition of soil arthropod community in Beijing urban ecosystems was similar to that of its woodland ecosystems.

Key words: Bactrocera cucurbitae, MtDNA, Cytochrome b gene, Genetic differentiation