海拔高度对落叶松叶蜂种群的影响及其生态型  

Influence of Elevation on the Population Density of Pristiphora erichsbnii ( Hartig ) and Its Ecological Type

作　　者：徐钊[1] 李孟楼[2] 吴定坤[3] 任新理 

机构地区：[1]西北林学院林学系 [2]西北林学院森林资源保护系 [3]西北林学院火地塘教学实验林场,陕西711600 [4]陕西省林业厅森防总站,西安710082

出　　处：《西北林学院学报》1992年第4期100-106,共7页Journal of Northwest Forestry University

摘　　要：本文通过对23块样方690个样点资料的分析表明,海拔的变化对落叶松叶蜂种群密度、生态型有显著影响,这种影响按海拔变化可划分为三种生态类型,在每种生态型之中种群密度、分布型呈规律性变化。在此基础上建立了种群密度与海拔高度间的回归模型。Describes the influence of elevation variation on the population density of larch sawfly and its ecological type based on an analyses of sample plot data. Accordingly, 3 ecological types are divided, and in each ecological type, the population density and spatical distribution varied regularly. A population density and elevation regression model is set up on this basis.

关 键 词：落叶松叶蜂 海拔高度 种群 生态型 

分 类 号：S763.430.2[农业科学—森林保护学]