摘要
土地承载着生态系统,土地利用变化在一定程度上影响着生态系统服务功能。本文分析广西左右江流域2005-2015年土地利用及生态系统服务功能的变化状况,运用交叉敏感性系数研究土地利用变化对生态系统服务功能的影响程度。研究表明:2005-2015年研究区的建设用地、水域和未利用地面积增加较为显著,耕地、林地和草地面积减少;建设用地、水域和未利用地的土地利用动态度相对较高,草地和林地相对较低;地类的变化主要发生在建设用地、林地、耕地和水域之间。研究区生态系统服务总价值略有波动,总体呈现下降的趋势。生态服务价值高值区主要分布在林地、耕地,其次是草地、水域和未利用地,建设用地则对生态服务价值具有负面影响。林地与草地向其他地类的转换表现出较强的敏感程度,而水域向建设用地、未利用地的转换,以及建设用地向未利用地的转换缺乏敏感。
Ecosystem service function is carried on the land,so the change of land use is bound to have a certain impact on the ecosystem.This article takes the Zuoyoujiang river basin as the research object,analyzes the change in land use and ecosystem service functions from 2005 to 2015,and then uses coefficient of cross-sensitivity to study the impact of land use changes on ecosystem services.The research shows that the area of construction land,water area and unused land increased significantly,while the area of cultivated land,woodland and grassland decreased;the dynamic degree of land use of construction land,water area and unused land were relatively high,while grassland and woodland is relatively low;the changes of land types mainly occur between construction land,forest land,cultivated land and water area.The total value of ecosystem services in the Zuoyoujiang river basin fluctuates slightly,showing an overall downward trend.The main distribution areas of forest land and cultivated land are areas with high value of ecological services,followed by grassland coverage areas,water coverage areas and unused land,while construction land has a negative impact on the value of ecological services.The transformation of woodland and grassland to other types of land shows a strong degree of sensitivity,while the transformation of water area to construction land and unused land,construction land to unused land are not sensitive.
作者
许洁
韦燕飞
童新华
冯文靖
安柳燕
XU Jie;WEI Yanfei;TONG Xinhua;FENG Wenjing;AN Liuyan(School of Natural Resources and Surveying,Nanning Normal University,Nanning 530001,Guangxi,China;School of Geography and Planning,Nanning Normal University,Nanning 530001,Guangxi,China)
出处
《国土资源情报》
2021年第6期8-17,共10页
Land and Resources Information
基金
国家自然科学基金项目(编号:41861039)。
关键词
左右江流域
土地利用变化
生态系统
生态价值
交叉敏感性系数
Zuoyoujiang river basin
land use change
ecosystem
ecological value
coefficient of crosssensitivity
