关键词: 荒漠草原, 啮齿动物群落, 系统聚类法

Abstract: The systematic studies of rodents community in the eastern part of desert-steppe were carried out by using hierachal clustering method．By using Whittaker's index of similarity I=1-0.5Σ∣ai—bi∣ as clustering index，18 species of 5 families were classfied into 8 communities；
1． Meriones unguiculatus + Citellus dauricus community;
2． Meriones unguiculatus community；
3． M .unguiculatus + Allactaga sibirica community;
4． M .unguiculatus + Lagurus luteus + Ochotona daurica + A.sibirica community;
5 M .unguiculatus+ C．dauricus+Dipus sagitta community;
6．M .unguiculatus+ C．daurieus+C．erythrogenys commmaity；
7．C．aaurlcus+M .unguiculatus community;
8．0．daurica+M ．ungulculatus community;
Compared with the cluster result of correlative coefficient，this result was more able to represent the component characteristics and community structure of the rodents in this part.

Key words: Desert-stepp, Rodents communit, Hierachial clustering method