云南西双版纳片断热带雨林鼠形啮齿类的物种多样性研究

THE STUDIES ON SPECIES DIVERSITY OF MYOMORPHA RODENTS IN THE FRAGMENTAL TROPICAL RAINFOREST IN XISHUANGBANNA,YUNNAN

本文以３个不同面积和环境状况的片断热带雨林即西双版纳傣族“龙山林”和１个自然保护区对照样地为工作样区，对热带雨林片断化后，鼠形啮齿类物种多样性的变化及其与环境的关系等进行了研究，结果如下：（１）４个样地铗捕获得的鼠形啮齿类种数分别为３、３、４和５种；（２）城子龙山和保护区对照样地的多样性指数较高（分别为２．０５８和１．９４４），而曼养广龙山和曼俄龙山的物种多样性指数仅为１．１６５和１．３５０；（３）各“龙山”的鼠形啮齿类物种多样性与其面积大小的相关性较弱，而与样地的隔离状况及人为干扰破坏的程度有较显著的相关性；（４）样地内鼠种组成的变化也和样地隔离状态及人为干扰破坏程度的不同密切相关；（５）各样地鼠形啮齿群落中生物量的分布也很不均匀。

This paper deals with the species diversity of myomorpha rodents captured bysnap-traps in Dai Nationality Holly Hills with different size of area and enviromental status.The field work porceeded in Xishuangbanna from March to May, 1994. The results are asfollow:(1)There are 3, 3, 5 and 4 species of myomorpha rodents captured in foursamples, respectively;(2)Myomorpha rodent species diversity indexes of four samples are1.165, 1.350, 2.058 and 1.944, respectively;(3)The myomorpha rodent species diversity isobviously related to the variation of samples′enviroments instead of their sizei(4)The different enviromental status of four samples are the main factors which cause the species changesof myomorpha rodents lived in these areas:(5)Biomass of myomorpha rodent varies considerably in different samples.