灵空山不同生境油松种群空间格局的地统计学分析  

Geostatistical analysis on the spatial pattern of Pinus tabulaeformis population at different habitats in the Lingkong Mountain

作　　者：李颖[1] 上官铁梁[1,2] 郭东罡[2] 张婕[3] 

机构地区：[1]山西大学黄土高原研究所,太原030006 [2]山西大学环境与资源学院,太原030006 [3]山西大学生命科学学院,太原030006

出　　处：《应用与环境生物学报》2015年第1期115-120,共6页Chinese Journal of Applied and Environmental Biology

基　　金：国家自然科学基金项目(3140 0358);山西省自然科学基金项目(2011011030-1)资助~~

摘　　要：为揭示油松(Pinus tabulaeformis)种群空间分布格局及其空间相关关系,采用地统计学的半方差分析法对灵空山国家级保护区内不同生境油松种群的空间分布格局进行分析,并用克里金插值法绘制不同生境油松种群胸高断面积的等值线图.结果表明:(1)山脊的油松种群胸高断面积的最优半方差拟合模型为指数模型,缓坡和沟谷的最优半方差拟合模型均为球状模型,3个生境的油松种群均呈聚集分布.(2)山脊、缓坡和沟谷的空间异质性主要是由空间自相关引起的,其空间自相关范围分别为11.16 m、9.99 m、4.74 m.(3)山脊和缓坡相较于沟谷而言具有较高的基台值、较高的决定系数、较低的分维数,说明山脊和缓坡的油松种群具有较高的空间异质性和较明显的空间格局,而沟谷的空间异质性程度较低.综上,灵空山各生境中的油松种群空间分布格局不尽相同,这是由油松自身的生物学特性和环境因素共同决定的.In order to reveal the distribution pattern and spatial correlation of Pinus tabulaeformis population,this research used geostatistical theory and methods to examine the distribution pattern and spatial correlation of P.tabulaeformis population in different habitats of the Lingkong Mountain.The results showed that the semivariograms well fitted the exponential model for P.tabulaeformis populations at the mountain ridge,and the spherical model for those in slow slopes and valley areas.All three populations showed aggregated pattern.The spatial heterogeneity of the habitats of ridge,slow slope and valley was mostly due to the spatial autocorrelation in the ranges of 11.16 m,9.99 m and 4.74 m,respectively.The populations at the ridges and gentle slopes showed greater sill values and determinant coefficient but lower fractal dimension than the pines in valleys,indicating that the first two habitats are characterized by higher degree of spatial heterogeneity and more significant spatial patterns,which is not found in the valley populations.Therefore the variations in the spatial distribution patterns of P.tabulaeformis populations is likely resulted from both the intrinsic biological characteristics and the environmental factors.

关 键 词：油松 胸高断面积 半方差 空间格局 灵空山 

分 类 号：S791.254[农业科学—林木遗传育种]