2000～2010年陕北地区草地退化状况时空分析
Temporal and Spatial Variation of Grassland Degradation in Northern Shaanxi during 2000-2010
宋辉 1刘康 1古超1
作者信息
- 1. 西北大学城市与环境学院,陕西西安710127
- 折叠
摘要
[目的]研究陕北地区生态系统健康状况,为该地区草地生态系统修复与保护提供理论依据.[方法]在对2000 ～ 2010年陕北地区草地生态系统变化状况进行遥感解译的基础上,运用GIS技术分析退化草地生态系统时空分布状况.采用退化草地动态变化度、转类指数、景观指数,多角度、多层次地对陕北地区退化草地生态系统进行分析.[结果] 2010年陕北地区草地生态系统状况较差,退化草地总面积为38 005.77 km2,占该地区草地总面积的88.28％.2000 ～ 2005、2005～2010年陕北地区草地生态系统向着改善的方向发展,2000 ～ 2005年极度退化草地面积减少了14 693.37 km2,未退化草地面积增加了793.79 km2,2005～2010年极度退化草地面积减少了11 306.56 km2,未退化草地面积增加了4 247.21 km2.[结论] 2000～ 2010年陕北地区生态系统呈改良趋势,但是2010年草地生态系统状况仍较差.后续需继续加大对陕北地区草地生态系统的修复与保护力度,构建结构稳定、功能健康的草地生态系统.
Abstract
[Objective] The aim was to study ecosystem health status in northern Shaanxi,and provide theoretical basis and practical guidance for restoration and protection of the grassland ecosystem.[Method] On the basis of remote sensing interpretation of grassland ecosystem variation status in northern Shaanxi during 2000-2010,using GIS technology,the spatial and temporal distribution of grassland degradation was analyzed by using dynamic degree,transfer index,landscape index.[Result] The status of grassland ecosystem in northern Shaanxi in 2010 was relatively poor,total area of grassland degradation was 38 005.77 km2,accounting for 88.28％.During 2000-2005,extreme degradation area was decreased 14 693.37 km2,non degradation area was increased 793.79 km2;during 2005-2010,extreme degradation area was decreased 11 306.56 km2,non degradation area was increased 4 247.21 km2.[Conclusion] From 2000-2010,ecosystem in northern Shaanxi was improved,but the situation of system in 2010 was still poor.So we should increase ecological restoration and protection in northern Shaanxi,construct grassland ecosystem with stable structure and healthy functions.
关键词
草地退化/时空变化/转移矩阵/景观格局指数/陕北地区Key words
Grassland degradation/Temporal and spatial variation/Transfer matrix/Landscape pattern index/Northern Shaanxi region引用本文复制引用
出版年
2016
国家科技期刊平台
NSTL
维普
万方数据