关键词: 啮齿动物, 群落结构, 青藏铁路, 褐家鼠, 输入, 乌兰县

Abstract: Objective Community composition of rodents was investigated in different habitats in Wulan county,Qinghai province,to primarily know whether Rattus norvegicus imported into west of Qinghai along the first project of Qinghai-Xizang Railway which is from Xining to Ge'ermu in Qinghai province,so as to provide basic evidence for future study of rodents species shift. Methods Rodents were captured with snap trap and live trap in different habitats of Wulan county,and then species were identified. Results Totally,1002 snap traps and 746 live traps were used and 168 small mammals were captured,of which 7 were pika (Ochotona thomasi) and others were rodents belonging to 8 species: Cricetulus longicaudatus,Mus musculus,Microtuss oeconomus,Meriones meridianus,Allactaga sibirica,Phodopus roborovskii,Apodemus latronum,Myospalax fontanierii. In the residential area of the town,M.musculus was the dominant species; while in the farmland and forest nursery,C.longicaudatus and M.meridianus were more popular. The density of rodents in steppe was the lowest in all habitats. No R.norvegicus was found in residential areas and farmland around the town investigated. Conclusion There is no nature population of R.norvegicus in Wulan county of Qinghai province more than 20 years after the first project of Qinghai-Xizang Railway was open to traffic. More studies and long term surveillance should be done to confirm whether R.norvegicus will invade into the central area of Qinghai-Tibet plateau.