祁连山北麓青海云杉高山草甸景观的尺度效应分析  

Scale Effect of Landscape Research on the Forest-Alpine Meadow Landscapes in North Piedmont of Qilianshan Mountains

作　　者：李秀梅[1] 常学礼[1] 张宁[1] 

机构地区：[1]鲁东大学地理与规划学院,山东烟台264025

出　　处：《中国沙漠》2009年第2期279-287,共9页Journal of Desert Research

基　　金：国家自然科学基金项目(40601007)资助

摘　　要：分析了分析尺度对祁连山地区0.61 m分辨率的QuickBird影像目视解译数据提取的影响。景观水平、斑块等级水平和斑块类型水平都反映,随分析尺度增大,斑块数迅速减少,形状趋于规则,景观破碎度降低,使景观结构简单化,主要是小型斑块损失引起。分析尺度对小斑块、中斑块影响大于大斑块和巨斑块。分析尺度较小时尺度效应变化速率大,分析尺度≥1∶8 000后尺度效应变化减缓,尺度依赖性减小。就文中涉及的5个分析尺度而言,可划分为小于1∶4 000,1∶4 000～1∶8 000,大于1∶8 000三个尺度域,1∶4 000和1∶8 000是尺度阈值,1∶4 000是最佳分析尺度。Analyzing scale has influence on the pick-up of visual interpretation data at 0, 61 m resolution. Our study in north piedmont of the Qilianshan Mountains showed that, on landscape level, patch size level, class level, the patch number decreases and landscape shape index becomes simplified with the increase of analyzing scale. The effect of analyzing scale on small-patch and middle-patch is larger than that on big-patch and huge-patch. The scale effect curves have steep changing rate when the analyzing scale is smaller, becoming relatively even when the analyzing scale is more than 1 ： 8 000. Among the three scale scopes involved in this paper： 〈1 ： 4 000, 1： 4 000-1 ： 8 000, 1 ： 8 000, the threshold 1 ： 4 000 is the best analyzing scale.

关 键 词：景观 尺度效应 祁连山北麓 

分 类 号：Q948.1[生物学—植物学]