关键词: 小型啮齿动物, 群落组成, 季节变动, 物种多样性, 东灵山

Abstract: The composition of the small rodents community were investigated by using method of trap-night in Dongling Mountain of Beijing in September 2000 and September 2001. There were 209 individuals of 6 species small rodents trapped. The total rate of small rodents captured was 16.08 %. The Apodemus peninsulae was the most dominant species of the small rodents community in study area. The small rodents were divided into 7 communities. Namely : Larch forest A. peninsulae + Niviventer confucianus community; shrubland A. peninsulae + N. confucianus community, Liaodong oak coppice A. peninsulae + Cricetulus triton community; abandoned farmland A. peninsulae + A. agrarius community, Chinese pine forest A. peninsulae + N. confucianus community, Conifer and broad-leaved mixed forest A. peninsulae + N. confucianus community, Liaodong oak forest A. peninsulae + N. confucianus community. The index of similarity of small rodents communities was generally high , and the index of the similarity between small rodents in Chinese pine artificial forest community and Liaodong oak forest community was the highest. The highest diversity and evenness index were in the shrub A. peninsulae + N. confucianus community. The numbers of small rodents were investigated monthly from May to October in 2000 and 2001. The population fluctuation in A. peninsulae and N. confucianus had singled-peak curve, and the highest population density was in August. The fluctuation of two populations in two years were high.

Key words: Small rodents, Community composition, Seasonal changes, Species diversity, Dongling Mountain