关键词: 白唇鹿, 有蹄类动物, 自然保护区, 栖息地类型, 群落结构, 数量等级

Abstract: The structure of ungulate communities were investigated at Yanchiwan of Subei County in 1987． Results are as follows:
1． The comparative complexity due to natural environment of this place causes species of ungulate to have compalatively numerous． A total of three families and seven species are found there． Among them ，five species belong to rare animals．
2． According to species composition and dominance of the ungulate and combining with ecological condition，they can be divided into four communities：
I． pseudois nayaur+ovis ammon+cervus albirostris community．
Ⅱ.cervus albirostris+ovis ammon+poephagus mutus community. Ⅲprocapra picticaudata +asinus kiang community. Ⅳasinus kiang+Gazella subgutturosa community.
3． The line transect sampling method was used，density of ungulate were calculated in four different ecological habitats (Table 1)．
4． Among the four communities,the index of diversity on the community Ⅱ is higher (0.9179) and that of community Ⅲ is lower (O.38O0)．The index of evenness on the community Ⅳ is higher (O.9887)and that of community Ⅲ is 1ower (0.3459)(Tab1e2，3)．
5． Cervus a1birostrisI poephagus mutus and Asinus Kitang are the conserved species of the first category in China, the endangered species in the Red Data Book and CITES．Their numerical distributions were delineated in Fig.1．

Key words: White—lipped deer, Ungulates, Nature reserve, Habitat form, Structure of community, Quantitative order