Abstract: The paper deals with the community structure of myomorpha rodents captured by snap -traps in the tropical mountainous rain forest and the subtropical mountainous evergreen broad-leaved forest. The field work prooeeded in Jinghong County (22°13'N, 100°40'E, 900°m above sea level), in Dec., 1984, and in Jingdong County (24°32'N, 101°02'E, 2400m), from May to June, 1981. The results are as follows:1. There are 6 species in the tropical forest and the capture rate is 3.35% . The relative abundance of dominant species, Rattus niviventer, is 81.18% . In the subtropical forest 8 species are captured. The capture rate is 5.89% and Apodemus draco (73.63%) is the dominant species.2. Average density is 13.21 for 6 species in the tropical forest and 20.25 for 5 species in the subtropical forest. A significant difference between them has been found.3. Average biomass is 711.43 and 530.19 in the tropical forest and the subtropical forest, respectively, without significant difference.4. The distribution of biomass is highly inequable. R. niviventer accounts for 77.37% in the tropical forest and A.draco 70.43% in the subtropical forest.From the results we have studied, it can be distinguished that the marked dominance cf R. niviventer and A.draco in the biomass and relative abundance of myomorpha rodents shows that they are very important in the study of small mammal functions in those ecosystems.

Key words: Myomorpha rodents, Community structure, Species diversity, Relative abundance, Density, Biomass

摘要： 热带山地雨林中捕获鼠形啮齿类6种,社鼠(Rattus niviventer)是优势种,相对丰盛度为81.18%;亚热带中山湿性阔叶林中捕获8种,中华姬鼠(Apodemus draco)为优势种,相对丰盛度为73.63%。两种森林类型鼠形啮齿类种类数目间并无显著差异。 热带山地雨林6种鼠形啮齿类平均密度为13.21只/公顷,平均生物量为711.43克/公顷;亚热带中山阔叶林中5种平均密度为20.25,平均生物量530.19。两种森林中鼠形啮齿类的平均密度差异显著,但生物量平均值却无明显差别。 群落中生物量分布极不均匀,社鼠和中华姬鼠的生物量分别在两种森林中各自占鼠形啮齿类总生物量的77.37%与70.43%。

关键词: 鼠形啮齿类, 群落结构, 种多样性, 相对丰盛度, 密度, 生物量