萧氏松茎象幼虫空间格局的地统计学分析  

Geostatistical analysis on spatial patterns of Hylobitelus xiaoi larvae

作　　者：杨轶中[1] 陈顺立[1] 黄炜东 余培旺 戴沿海 

机构地区：[1]福建农林大学林学院,福建福州350002 [2]将乐县林业局,福建将乐353300 [3]武夷山市林业局,福建武夷山354300 [4]漳州市林业局,福建漳州363000

出　　处：《福建林学院学报》2006年第2期123-126,共4页Journal of Fujian College of Forestry

基　　金：福建省科技厅重点科技项目(2004N013);武夷山风景名胜区管委会资助项目

摘　　要：应用地统计学的方法分析了萧氏松茎象幼虫空间格局,在2 m×2 m的样方下分别建立了东→西和南→北2个方向的变异函数理论模型,并应用克立格插值法对其种群密度进行估计.结果表明:球状模型对萧氏松茎象幼虫种群在2个方向上的理论变异函数均有很好的拟合,萧氏松茎象幼虫在东→西方向和南→北方向的变程即相关距离分别为7.654 7 m和7.467 2 m,空间连续性强度分别为0.513 9和0.453 7,表明其空间格局为中等强度的聚集.Geostatistical methods were applied to study the spatial pattern of Hylobitelus xiaoi larvae. Semivariogram models were established in two directions of west-east and north-south at 2 m × 2 m gride size. The Kriging method was also used to estimate the population density. The results showed that the semivariograms of H. xiaoi larvae in the two directions could be described by spherical models, their spatial pattern was aggregated, dependence range was 7. 654 7 m in west-east and 7.467 2 m in north-south, and aggregation intensity was 0. 5139 in west-east and 0.4537 in north-south. These indicated that the population was middle-class aggregated.

关 键 词：萧氏松茎象 空间格局 地统计学 

分 类 号：S763.3[农业科学—森林保护学]