摘要
应用地学统计学（ｇｅｏｓｔａｔｉｓｔｉｃｓ）的原理和方法研究了３种松林中马尾松毛虫越冬代蛹及其寄生天敌群子的空间结构和空间相关性。结果表明，湿地松－马尾松－火炬松混交松林中蛹的半变异函数曲线为球形，其空间格局为聚集型。受害程度高的马尾松纯林中，蛹的半变异函数曲线为指数形，空间格局为聚集型。受害程度低的纯马尾松林中，蛹的半变异函数曲线是一条截距为０．４２３、斜率为０．００３８１４的直线，表明为随机或均匀型的空间格局。３种松林中蛹的寄生天敌群子的半变异函数均为近乎水平的直线，属随机或均匀型的空间格局。这些结果和方法可应用于种群时空动态格局及自然控制机理的研究。
Studies on the spatial construction and distribution of masson pine caterpillar (Dendrolimus punctatus (Walker)) pupae and its parasitic natural enemy guilds for the overwintering generation in three pine forests (i.e., the pure masson pine stands of high and the low damage level, and the Pinus elliottii P.massoniana P.taeda mixed pine forest) were carried out using geostatistics. The results of analysis reveal spatial distributions of pupae and its parasitic natural enemy guilds semivariograms. The semivariogram of pupae was described by spherical model in the mixed pine forest, indicating an aggregated spatial arrangement. In the pure masson pine stands of high damage, semivariogram of pupae was fitted by an exponential model, also indicating an aggregated spatial arrangement. In the low damage stands. semivariogram was linear with 0.423 intercept and a very low slope (0.003814), indicating random or uniform spatial pattern. The semivariograms of parasitic natural emenies guilds in three pine forests were linear with little slope, showing random or uniform distribution. The results and methods are applicable to the temporal and spatial dynamics of insect population and the insect pest ecological control.
出处
《生态学报》
CAS
CSCD
北大核心
1997年第4期386-392,共7页
Acta Ecologica Sinica
基金
国家自然科学基金
关键词
马尾松毛虫
蛹
寄生天敌
空间格局
松林类型
Dendrolimus punctatus (Walker), pupae, parasitic natural enemy , spatial distribution, pine forest, geostatistics.
