珍稀鹤类巢址的空间聚类识别方法

Identifying Spatial Clustering Phenomena in Rare Cranes Nest-Site

依据2003年到2005年松嫩平原西部地区珍稀鹤类巢址调查数据,利用三种不同类型的指数进行分析研究:(1)拓扑指数,Voronoi图面积;(2)统计指数,Morishita指数; (3)空间指数,分维数.结果表明珍稀鹤类巢址空间格局具有明显的空间聚类分布,这三个指数使我们对珍稀鹤类巢址的聚类现象有了定量的认识,加深对自然保护区资源保护的重要性.

Spatial clustering in the rare crane nest data recorded from 2003 to 2005 in the area of western Songnen Plain has been deeply investigated using indices of different type： （i） a topological index,the Voronoi polygon area;（ii） a statistical index,the Morishita index; （iii） a dimensional index,the fractal dimension.Our findings reveal the presence of clustering in the spatial distribution of the rare crane nest data set analysed.The knowledge of such property can be very useful to quantificationally identify the rare crane nest data in those areas,where particular prevention and allocation of resources should be assessed.