大院资源冷杉种群的空间分布格局分析

Spatial pattern analysis of Abies ziyuanensis population in Dayuan

资源冷杉是极度濒危的我国特有植物，其中的湖南省炎陵县大院资源冷杉种群是种群规模最大的种群。该研究采用点格局分析方法分析了该种群的种群分布格局，用计盒维数和信息维数研究了种群格局的分形特征。结果表明：大院资源冷杉种群的空间分布格局总体上呈聚集分布；种群的计盒维数在1．047～1．354之间，种群占据空间程度较弱；种群的信息维数在1．093～1．434之间，种群格局强度尺度变化程度较低。

Abies ziyuanensis is a critically endangered plant species endemic to China, and its population in Dayuan of Yanling County, Hunan Province has the largest size. In this research,the spatial pattern ofA. ziyuanensis population in Dayuan was analyzed using point pattern analysis and the fractal characteristics of pattern was analyzed by applying boxcounting dimension and information dimension. The results suggested that A. ziyuanensis population in Dayuan presented an aggregating distribution. The box-counting dimension ranged from 1. 047 to 1. 354, which reflected a low spatial occupation degree of the population. The information dimension of population patterns were low（ 1. 093 to 1. 434）. The scale variation degree of pattern intensities was low.