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罗维.洋河流域土地利用时空变异及其对生态服务功能价值的影响.生态学报,2017,(16).http://dx.doi.org/10.5846/stxb201605180962  
洋河流域土地利用时空变异及其对生态服务功能价值的影响
Temporal and spatial variation of land uses and their influences on ecosystem service function values within the Yanghe Watershed
投稿时间:2016-05-18  最后修改时间:2017-03-05
DOI: 10.5846/stxb201605180962
关键词农牧交错带  水源地  生态服务功能  价值评估  土地利用变化
Key Wordsfarming pastoral zone  water source site  ecosystem service function  value estimation  land use change
基金项目国家自然科学基金项目(41571479,41271502,C031001);国土资源部土地整理中心外协项目:土地整治工程的生态效益评价研究 (2017⁃20)
作者单位E-mail
罗维 中国科学院生态环境研究中心城市与区域生态国家重点实验室 luow@rcees.ac.cn 
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摘要:
洋河流域位于我国北方典型的农牧交错地带,是首都重要的水源涵养地和生态保护屏障,也是2022年冬奥会举办地之一。对流域土地利用变化及其生态服务功能价值影响的研究可为首都水源保护以及冬奥会运动场地环境质量的改善提供重要的理论依据和决策支持。本研究利用ArcGIS技术分析了洋河流域1990-2013年间三个不同时间点的土地遥感数据,并估算了这些变化对流域生态服务价值的影响。结果表明:1990-2013年洋河流域林地和未利用地面积呈增加,而水域、草地则呈减少的趋势,流域土地利用的剧烈程度增加。1990-2013年间洋河流域土地利用的年总生态服务价值经历先增加后减小,但总体减少的过程,其中耕地、草地和水域的生态服务价值减少,但林地和未利用地的生态服务价值增加。由于林地面积增加从而导致1990-2013年流域的原材料生产、气候调节、气体调节、生物多样性保护和提供美学景生态功能占年总价值的比值增加。林地、草地和耕地是洋河流域生态服务的主要贡献者,也是生态服务价值变化的敏感因子。
Abstract:
The Yanghe Watershed which is not only an important water-source conservation site but also an ecological protection barrier for Beijing, which is located in the typical farming pastoral zone of North China. The 2022 Winter Olympic Games will be held in Zhangjiakou City which is a key region of the Yanghe Watershed. Study of change of land uses and their ecosystem service-function values can provide important theoretical basis and decision-making policies for water-source protection and environmental quality improvement in fields of the Olympic Games. ArcGIS was used to analyze remote sensing data of lands within the Yanghe Watershed during 1990-2013, and ecosystem service-function values of the lands were estimated. Results showed that forest- and unused-lands increased while grass land and water area decreased from 1990 to 2013 within the watershed. Also, intensity of land use increased during the period. Total annual value of ecosystem service-functions of the lands increased in 1990-2000 and then decreased in 2000-2013; however, totally it displayed a decreasing trend from 1990 to 2013. Service-function values of grass land, water area and farm land decreased while those of forest land and unused land increased during 1990-2013. Percentages of values of raw material production, climate regulation, air conditioning, biodiversity conservation and the aesthetic landscape increased owing to the increases of forest lands within the watershed during the study period. Forest-, grass- and farm-lands were not only the main contributors, but also the sensitive factors to ecosystem service-function values of the lands within the Yanghe Watershed from 1990 to 2013.
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