文献类型：期刊文献

中文题名：内蒙古大兴安岭根河森林保护区植被覆盖度变化

英文题名：Vegetation fractional coverage change in Daxinganling Genhe forest reserve of Inner Mongolia

作者：闫敏[1] 李增元[1] 陈尔学[1] 田昕[1] 谷成燕[1] 李春梅[1,2] 范文武[1,3]

第一作者：闫敏

机构：[1]中国林业科学研究院资源信息研究所;[2]西南林业大学林学院;[3]福州大学省空间信息工程研究中心

年份：2016

卷号：35

期号：2

起止页码：508-515

中文期刊名：生态学杂志

外文期刊名：Chinese Journal of Ecology

收录：CSTPCD;;Scopus;北大核心:【北大核心2014】；CSCD:【CSCD2015_2016】；

基金：国家重点基础研究发展计划(2013CB733404);高分森林资源监测应用示范子系统(一期)(21-Y30B05-9001-13-15-1)资助

语种：中文

中文关键词：GF-1影像;像元二分模型;植被覆盖度;地形

外文关键词：GF-1 image ; dimidiate pixel model ; vegetation fractional coverage ; terrain.

分类号：S157.1

摘要：基于2000年Landsat-5 TM和2013年GF-1两期遥感影像,利用像元二分模型分别进行了内蒙古大兴安岭根河森林保护区植被覆盖度的估算,并对该区13年间植被覆盖度的变化情况及其与地形因子的相关性进行了分析。结果表明:利用像元二分法可准确地估算研究区植被覆盖度(决定系数R^2=0.52,相对平方误差RSE=0.54)。两期植被覆盖度与高程正相关性最大,其次为坡度。两期植被覆盖度变化图表明,该地区13年间植被覆盖度总体呈下降趋势,其中高覆盖度的下降最为明显。两期植被覆盖度及其差值随高程的增加而增大,海拔超过1027 m两者均变化缓慢,且植被覆盖度变化主要为正变化。火灾、水系富集、人工抚育频繁等因素对低海拔地区植被覆盖度的下降影响较大。
The estimations of thirteen-year interval vegetation fractional coverage （VFC） of Genhe forest reserve area were conducted using Landsat-5 TM data acquired in 2000 and GF-1 images in 2013 based on the dimidiate pixel model. The changes of VFC and the relationships be- tween VFC and topographical factors were analyzed. Validated against the field measurement conducted in August 2013, the estimation of VFC using GF-1 image was reliable （R2= 0.52, RSE= 0.54）. The factor that was most positively correlated to the VFC was the altitude, followed by the slope. The VFC declined generally from 2000 to 2013 and the high level of VFC experienced the most obvious change. In particular, both VFCs in 2000 and 2013, as well as their differences which were mostly positive, increased with the altitude until 1027 m, above which the VFC changed slightly. Forest fires, rich drainage and forest tending had great impacts on the decrease of VFC in the low-altitude mountainous region.