云南省两栖动物地理分布格局的聚类分析

为了量化云南省两栖动物地理分布格局及其相似性，对云南省102种两栖动物在地理小区的分布格局尺度上进行了聚类分析。建立物种有无分布的二元数据列联表，利用联合系数表示每两个地理小区内两栖动物的相似程度，以类平均法进行了聚类分析。结果表明，云南两栖动物可以归类为两大类群，相邻动物地理小区相似程度较高，南北差异显著。云南两栖动物地理分布格局与地势的阶梯变化基本一致。受地形、河流和气候的影响，分布格局的纬度变化规律不明显。在此基础上对结果与地理区划进行了对比。

Cluster Analysis on Geographical Distribution of Amphibians in Yunnan Province

To quantify the comparability of geographical distribution pattern of amphibians in Yunnan Province, the geographical distribution of 102 amphibians were regarded as two - state character and classified. The association coefficient was taken for the similar degree of amphibians in every two zoogeographical zones. The cluster analysis was taken by group average method. The result indicates that amphibians in Yunnan Province could be classified into two groups, and there was higher similarity between the boarding zones. The distribution pattern of amphibians varies as the laddering change of hypsography. As the effect of terrain, river, lake and climate, the variational regulation of the distribution as the latitude change was not so obvious. There is significant difference between northern and southern. Finally, the characteristics of geographical distribution pattern and the comparison between the cluster analysis result and the geographical division are discussed on the bases of results.