关键词: 九寨沟自然保护区, 兽类, 区系

Abstract: From 2003 to 2004, the mammal fauna of the Jiuzhaigou National Nature Reserve was surveyed. Six separate surveys were conducted during this period. A summary of these collections showed that there are 78 species mammals in the Jiuzhaigou National Nature Reserve. An investigation of the biogeographic origin of this mammal fauna indicates that 50 species belong to the Oriental realm, 25 species belong to the Palaearctic realm, and 3 species are widely distributed. Ten general patterns of distribution were noted among the 78 species of mammal. This reserve's mammals show a very high south-north penetrability and antiquity. Twenty species in this reserve have been identified as nationally protected rare mammals; six of the species are first grade protected rare mammals. In addition, there are many rare small mammals in the reserve, such as the China jumping mouse ( Eozapus setchuanus), Chinese Dormouse ( Chaetocauda sichuanensis) and Bedford's vole ( Proedromys bedfordi). There is a distinct trend for an increasing proportion of Palaearctic mammals and decreasing proportion of Oriental mammals as one ascends from 2 000 - 3 600 m. However, 3 200 - 3 600 m there is an abundance of both Palaearctic and Oriental species. These results show that this mammal fauna is broadly in transition in this area, including at elevations above 3 200 m.

Key words: Fauna, Jiuzhaigou National Nature Reserve, Mammal