引用本文:
【打印本页】   【HTML】   【下载PDF全文】   查看/发表评论  【EndNote】   【RefMan】   【BibTex】
←前一篇|后一篇→ 过刊浏览    高级检索
本文已被:浏览 64次   下载 29 本文二维码信息
码上扫一扫!
分享到: 微信 更多
呼伦贝尔沙地2000-2020年土地利用变化及生态服务价值
张天琪1, 杨光1, 刘峰1, 穆其尔1, 涛力2, 马勇2
1.内蒙古农业大学 沙漠治理学院, 内蒙古 呼和浩特 010018;2.鄂尔多斯市造林总场, 内蒙古 鄂尔多斯市 017000
摘要:
[目的] 研究呼伦贝尔沙地土地利用动态以及生态系统服务功能演变情况,为该区优化土地利用结构以及改善生态服务功能提供理论支撑。[方法] 以呼伦贝尔沙地2000,2005,2010,2015和2020年5期遥感影像为数据源,在ENVI 5.3和ArcGIS 10.2的支持下,运用土地动态度空间分析模型、变化强度分析土地利用变化特征,采用中国沙地生态服务价值表的计算方法对呼伦贝尔沙地土地利用数据进行分析,计算呼伦贝尔沙地的生态服务价值以及敏感性指数。[结果] ①研究区沙漠化呈逆转趋势,各沙漠化土地面积均减少,极重度沙漠化土地面积共减少627.3 km2,林草地面积不断增加,生态环境得到了有效的改善;从土地利用类型变化来看,主要以沙漠化逐级转移为主,其他转换类型的转化比重相对较小;②从变化速率来看,林草地的变化幅度最大,以年变化率9.3%的速度增加;从变化强度的绝对值来看,轻度沙漠化的变化强度最大,20 a间面积减少70%;③呼伦贝尔沙地的生态服务价值总体呈现增长趋势,其中林草地生态服务价值最高,极重度沙漠化的生态服务价值最低;生态服务价值的敏感性指数均<1,说明沙地的生态服务价值相对较稳定。[结论] 研究区应扩大林草地面积,合理治理沙漠区域,提升区域生态系统服务价值。
关键词:  呼伦贝尔沙地  土地利用  转移矩阵  生态服务价值
DOI:10.13961/j.cnki.stbctb.2021.04.043
分类号:F301.24
基金项目:内蒙古自治区科技重大专项课题“沙地生态系统近自然修复技术研究及产业化示范”(2019ZD003-2)
Land Use Change and Ecological Service Value of Hulun Buir Sandy Land from 2000 to 2020
Zhang Tianqi1, Yang Guang1, Liu Feng1, Mu Qier1, Tao Li2, Ma Yong2
1.College of Desert Control Science and Engineering, Inner Mongolia Agricultural University, Hohhot, Inner Mongolia 010018, China;2.Forest General Site of Ordos City, Ordos, Inner Mongolia 017000, China
Abstract:
[Objective] The land use dynamics and the evolution of ecosystem service functions in Hulun Buir sandy land were studied to provide support for optimizing the land use structure and improving the ecological service function in this area. [Methods] Based on the remote sensing images of Hulun Buir sandy land in 2000, 2005, 2010, 2015 and 2020, and the supported by ENVI 5.3 and ArcGIS 10.2, the characteristics of land use change were analyzed by using the spatial analysis model of land dynamic attitude and the change intensity. The land use data of Hulun Buir sandy land were analyzed by using the calculation method of China’s sand ecological service value table and the ecological service value and sensitivity index of Hulunbuir sandy land were calculated. [Results] ① Desertification showed a reversal trend, the area of each desertified land decreased, the area of forest and grassland increased, the ecological environment of the area had been effectively improved. ② From the point of view of the rate of change,the change of forest and grassland was the largest, with the annual change rate of 9.3%. From the absolute value of change intensity, the change intensity of mild desertification was the largest, and the area decreased by 70% in 20 years. ③ The overall ecological service value of Hulun Buir sandy land showed an increasing trend, among which the ecological service value of forest and grass land was the highest, and the ecological service value of extremely severe desertification was the lowest. The sensitivity index of ecological service value are all less than 1, indicating that the ecological service value of sand was relatively stable and the results were credible. [Conclusion] The region should expand the area of forest grassland, manage the desert area reasonably, and enhance the value of regional ecosystem services.
Key words:  Hulun Buir sandy land  land use  transition matrix  ecological service value