Abstract: According to the results of sampling and cluster analysis , the rodent community in the J unggar Basin can be divided into four types : 1) farmland community dominated by Cricetulus migratorius and Mus musculus ; 2) saxideserta community dominated by Meriones erythrourus and C. migratorius ; 3) residential area community dominated by Rattus norvegiens and Mus musculus ; 4) haloxylon eremic community dominated by Dipus sagitta and Meriones meridianus. The community 4 has the highest species diversity (1. 670) , and 3 has the lowest (0. 979) . In pace with the human economic activities , the desert community dominated by jird and jerboa will be replaced by the damp community dominated by M. musculus and C. migratourius. The new community pattern is that R. norvegicus will play an important role in some urban areas.

Key words: Sinocalycanthus chinensis, allozyme, genetic diversity, natural reserve, conservation biology