中文摘要：

采用样地调查法研究了滇西北云岭东坡5个垂直带和10个水平带32块样地的蚂蚁群落与物种多样性。物种数目为l～17种，个体密度为4．0～368．0头·m^-2，优势度指数为0．223～1．000，物种多样性指数为0．000～1．787，均匀度指数为0．062～0．747。在各垂直带上，个体密度随海拔的升高、气温的降低而减少；山体中部植被和气候综合条件最好，其蚂蚁物种数、多样性指数和均匀度指数高于山体上部和下部，优势度指数低于山体上部和下部。水平带上，各样地的多样性指数无规律性，这与样地特殊的局部环境和人类干扰有很大关系。蚂蚁群落相似性系数表明，不同样地蚂蚁群落间差异显著，滇西北云岭山脉整个生态系统生境多样性丰富。

英文摘要：

Using sample plot investigation method, ant communities and species diversity of 32 sample plots on 5 vertical and 10 horizontal bands from east slope of Yunling Mountain were surveyed in October 2004. The Species numbers ranged between 1 - 17, individual densities ranged between 4.0 - 368.0 heads · m^-2 species diversity indexes ranged between 0 - 1. 787, evenness indexes ranged between 0. 062 - 0. 747, and predominant indexes ranged between 0. 223 - 1. 000. On vertical bands, the individual densities were basically decreasing along with the increasing of altitude and decreasing of temperature. Because the middle section of the mountain has the best condi- tion of vegetation and climate, the maximum values of ant species numbers, species diversity indexes and evenness indexes were observed at the middle section, meanwhile, the minimum values of predominant indexes were obtained at the same place. On horizontal bands, almost all the diversity indexes were without regularity, the phenomenon was closely related with special partial environments and human being disturbance of the sample plots. According to simi- larity coefficents, ant communities of different sample plots were distinctly divergence on both vertical and horizontal bands, the whole ecosystem of Yunling Mountain at Northwestern Yunnan is rich in habitat diversity.