松墨天牛和花绒坚甲种群空间格局的地统计学分析

Geostastics Analysis of Spatial Patterns of Monochamus Alternatus and Dastarcus Helophoroides

应用地统计学的原理和方法研究了黑松、马尾松、湿地松树林松墨天牛和花绒坚甲种群的空间结构和空间相关性,结果表明3种松树林中松墨天牛种群的半变异函数曲线皆为球型,其空间格局为聚集型,2005年黑松、马尾松、湿地松上的松墨天牛种群空间变程依次为116.06、33.85、115.76,2004年黑松、马尾松上的松墨天牛种群空间变程依次为36.48、38.02;2005年黑松、马尾松、湿地松上的花绒坚甲种群空间变程依次为92.36、46.50、63.37,2004年黑松、马尾松上的花绒坚甲种群空间变程依次为空间变程依次为80.00、40.23,花绒坚甲种群的拟合半变异函数曲线也表现为球型,呈聚集空间格局,与松墨天牛种群变程和分布格局基本上一致,后者对前者在空间上有较强的追随关系,表明花绒坚甲与松墨天牛有一定依存关系。

Geostastics analysis was used to study the spatial pattern and relationship of monochamusalternatus and its natural enemy-dastarcus helophoroides.The results indicated that the semivariogram ofmonochamus alternatus and dastarcus helophoroides could be described by spherical model and its spatialconstruction showed aggregated distribution.The ranges of spatial dependence（RSD） of monochamusalternatus on p.thunbergii lamb and pinus massoniana and p.elliotii in turn were 116.06,33.85,115.76 in2005 ;the RSD of monochamus alternatus on p.thunbergii lamb and pinus massoniana in turn were 36.48and 38.02 in 2004.The ranges of spatial dependence（RSD） of dastarcus helophoroides on p.thunbergiilamb and pinus massoniana and p.elliotii in turn were 92.36,46.50,63.37 in 2005;the RSD of dastarcushelophoroides on p.thunbergii lamb and pinus massoniana in turn were 80.00 and 40.23 in 2004.It couldbe concluded that their RSDs on the whole were identical and their relationship was the latter on thespace was after the former.Therefore,dastarcus helophoroides was the dominant natural enemy ofmonochamus alternatus.