自然科学版
陕西师范大学学报(自然科学版)
资源与环境科学
泾河流域土地利用及其生态系统服务变化
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赵永华1,贾夏2,王晓峰1
(1 长安大学 地球科学与资源学院, 西部矿产资源与地质工程教育部重点实验室;2 长安大学 环境科学与工程学院, 陕西 西安 710054)
赵永华,男,副教授,博士,主要从事土地利用、景观生态及3S应用方面的教学与科研工作.E-mail:yonghuaz@chd.edu.cn.
摘要:
利用1986年、1995年和2000年3期遥感解译结果分析了泾河流域土地利用变化及其生态系统服务价值变化.结果表明,草地是该区最大的土地利用类型,其次是耕地,二者占研究区总面积的85%以上,而对区域的生态环境和生态系统服务起着重要作用的林地面积却较小.研究期内各土地利用类型均有不同程度变化,总时段变化与各时段的变化有所不同,土地利用类型间的相互转化主要发生在耕地、草地和林地之间,构造的面积转入比例矩阵和转出比例矩阵较好地反映了土地利用类型变化的来源与去向.土地利用类型变化导致区域的生态系统服务价值也发生了相应改变.生态服务价值呈先减小后增加变化,但总趋势是减少,各土地利用类型的不同服务价值在不同年间和土地利用类型间的差距比较明显,该区生态系统服务价值变化程度直接受其主要的土地利用类型变化剧烈程度影响.研究区1986年、1995年和2000年总的生态系统服务价值分别为53313亿、525.56亿和529.74亿元,2000年的生态系统服务价值还没有恢复到研究起始时间的水平,因此需要进一步加大植被恢复重建工作,积极推进已有工程实施的力度和深度.
关键词:
泾河; 土地利用; 生态系统服务
收稿日期:
2011-02-07
中图分类号:
F301.24
文献标识码:
A
文章编号:
1672-4291(2011)04-0079-07
基金项目:
国家自然科学基金资助项目(31000222).
Doi:
Land use change and its ecosystem services in Jinghe River basin
ZHAO Yong-hua1, JIA Xia2, WANG Xiao-feng1
(1 College of Earth Science and Resources, Key Laboratory of Western Mineral Resources and Geological Engineering of Ministry of Education, Chang′an University;2 College of Environment Science and Engineering, Chang′an University, Xi′an 710054, Shaanxi, China)
Abstract:
Land use change and its ecosystem services value in Jing River basin were studied based on the interpreted results of remote sensing images in 1986, 1995 and 2000. The results showed that grassland was the largest area of land type, followed by cultivated land, both of them accounting for more than 85% of total area, while the woodland played an important role in the ecological environment and ecosystem services was small. All of the land use types changed in different level. The mutual conversion between different land use types occurred in cultivated land, grassland and woodland. The exported and imported matrixes of area proportion reflected the sources and sink of land use type change. Regional land use changes resulted in the changes of ecosystem service value accordingly. The ecosystem service value firstly decreased and then increased, but the overall trend was reduced. The ecosystem services value of land use types were different obviously in different years and land use types. The value of ecosystem services in Jinghe River Basin was 53313 × 108 Yuan in 1986, 52556 × 108 Yuan in 1995, and 52974 × 108 Yuan in 2000, which showed that the ecosystem services in Jinghe River Basin have been improved, but the ecosystem services value in 2000 have not recovered to the level in 1986. Therefore, the vegetation restoration and reconstruction were required to be further increased and actively promoted the implementation of existing projects.
KeyWords:
Jinghe River; land use; ecosystem services