Abstract: Two surveys of the diversity of large and medium sized mammal species of the Haizishan Nature Reserve,Sichuan Province,China were conducted in 2003 - 2004. Thirty-four mammal species and 475 trails or individuals were documented along 70 routes. Mammals were most abundant in alpine shrub habitat. At higher elevations,we noted a trend toward a gradually increasing proportion of Palearctic mammal species and a decreasing proportion of Oriental mammal species; this change occured between 3 800 -4 400 m. Between 4 400 - 4 700 m, 62% of the mammal fauna is of Palearctic origin; above 4 700 m the fauna is exclusively Palearctic. Among the 34 mammal species, the Wapti, Serow, Goral and Blue sheep have the broadest elevational ranges and are widely distributed in the area. During these surveys,the Roan musk deer was found to be the most common species in the area.

Key words: Diversity, Haizishan Nature Reserve, Large and medium sized mammals, Sichuan Province

关键词: 四川海子山自然保护区, 大中型兽类, 多样性