基于GIS的那坡县林地景观格局分析

Analysis of Woodland Landscape Pattern of Napo County Base on GIS

运用ARCGIS软件的扩展模块Patch Analyst,以那坡县林地保护利用规划的基准年(2009)数据为基础数据,基于10个林地景观类型,计算其景观形状特征指数、景观破碎化指数、多样性指数;按优势树种将森林景观划分为14个景观,并计算其多样性指数。结果表明:景观形状指数特征表明林地景观的斑块边界褶皱程度不高,乔木林景观受人为活动干扰程度较小;景观破碎化特征表明乔木林景观在林地景观中占主导地位,其受人为干扰的程度较低;林地地类与森林景观类型的多样性与其最大多样性指数相差较大,说明各分类所占面积比例差距较明显。

Applying the expansion module Patch Analyst of ARCGIS, taking the data of base year （2009） as foundation data attained from the forestland planning on protection and utilization in Napo County, base on 10 woodland landscape types, three indexes including characteristics of forest shape in- dex, forest fragmentation indexand forest diversity index were calculated. According to the dominant tree species, forest landscape was classified into 14 types of landscape, and the forest diversity index was cal- culated . Results are shown as the followings ： （ 1 ） characteristics of forest shape index indicated that the patch boundary of forest landscape had a lower folding degree; the arboreal forest landscape was affected by human activities with less interference; （2） Forest fragmentation index characteristics revealed that the arboreal forest landscape dominated in the woodland landscape and had a low human disturbance; （3） The difference between the forestland diversity index and maximum diversity index was large, which indicated that the proportion of all classes of forestlands was obvious.