GIS支持下的种群分布格局分析

Analysis of Population Distribution Pattern Based on GIS Technique

借助地理信息系统软件以及最近邻体分析扩展模块 ,采用修正后的最近邻体公式 ,研究了规则样地和不规则样地的种群分布格局。地理信息系统的应用 ,不但提高了格局分析的效率 ,也可以直观地反映种群的分布格局。与方差均值比相比 ,最近邻体法不受样方大小以及样地形状的影响。研究表明 ,无论在规则样地还是在不规则样地中 ,最近邻体法都非常有效。

With the aid of GIS software and its nearest-neighbor extension module, population distribution pattern in regular and irregular plots was studied with a revised nearest-neighbor method. The results indicate GIS can not only improve the efficiency of pattern analysis but also visually display the distribution pattern. Compared to variance-mean ratio, nearest-neighbor method is neither influenced by the size of quadrat nor by the shape of plot. It is also suitable for both regular and irregular plots.