仙居县古树资源的空间分布格局

Spatial Distribution Pattern of Ancient Tree Resources in Xianju County

根据浙江省仙居县2017年古树资源调查资料,利用扩散系数、平均拥挤度、聚集(块)性指标、负二项分布K值、David&Moore丛生指标等多项空间分布格局指标,研究仙居县古树资源的空间分布格局。结果表明,仙居县古树无论株数还是种类其空间分布格局均为聚集分布,纬度、经度对古树株数或种类的空间分布无显著影响。海拔对古树株数的空间分布无显著影响,但对古树种类的空间分布有显著影响。

According to the survey data of ancient tree resources in 2017 in Xianju County,Zhejiang Province,the spatial distribution pattern of ancient tree resources in Xianju County was studied by using a number of spatial distribution pattern indexes,such as diffusion coefficient,mean crowding,patchiness index,negative binomial parameter K,David&Moore clumping index and so on.The results showed that the spatial distribution pattern of the number or species of ancient trees in Xianju County was aggregated distribution.Latitude and longitude had no significant effects on the spatial distribution of ancient trees number or species.Elevation had no significant effects on the spatial distribution of ancient trees number,but it had significant effects on the spatial distribution of ancient trees species.