摘要
关键性生态用地对维护区域生态系统稳定、维持生态系统服务功能良性循环不可或缺,识别流域关键性生态用地,可为区域生态保护工作提供参考。该研究以滇池流域为研究区,结合流域生态系统服务功能特征及土地利用现状,选取水源涵养、生物多样性保护、水土保持及景观休闲等主要生态系统服务功能进行生态用地重要性评价,在此基础上采用最小累积阻力模型进行关键性生态用地识别研究。结果表明:2019年,滇池流域关键性生态用地面积为1216.30 km^(2),占流域总面积41.65%,主要分布于流域北部、中西部及东部边界,以林地、水域为主,两者面积分别为774.53、306.39 km^(2),具有涵养水源、防止水土流失、维护生物多样性、发挥景观休闲等作用。识别结果能反映出维护流域生态功能的最重要生态用地,对滇池流域生态用地的规划与保护具有现实指导意义。
Critical ecological land is one of the most important areas to maintain the stability of ecosystem service function,due to water conservation and resistance to soil erosion for the biodiversity.However,a fierce contradiction is ever increasing between ecological protection and economic development under the rapid urbanization in China.Therefore,a coordinating relationship is greatly significant to maintain regional ecological security and environmental protection.Previous ecological land focuses mainly on the concept,type division,and function zoning.It is also lacking in the identification of critical ecological land at present.Accurate identification of critical ecological land in plateau lakeside areas can contribute to ensuring the stability of regional ecological function,and maintaining the virtuous circle of the ecosystem service function.Taking the Dianchi watershed as the study area,the minimum cumulative resistance model was utilized to identify the critical ecological land using a perspective of ecological land importance.Firstly,the ecosystem service functions were selected to evaluate the importance of ecological lands,such as water,biological,soil,and water conservation,as well as landscape leisure,according to the present situation of land use.Then,the cumulative correction and summation were utilized to superimpose four levels for the comprehensive identification of ecological land importance.Five grades were divided into extremely important,important,generally important,and non-important.Finally,the“Resistance Surface”was obtained to assign land use type,where the ecological land with the extremely important grade was selected as the“Source”of the minimum cumulative resistance model.The critical ecological land was identified in Dianchi watershed using the ArcGIS technology and the minimum cumulative resistance model through COST-DISTANCE tools.The results showed that:1)The“Source”land was mainly the water area and woodland that were distributed in the north,central and western areas
作者
刘林
雷冬梅
冉玉菊
张渊
Liu Lin;Lei Dongmei;Ran Yuju;Zhang Yuan(School of City and Environment,Yunnan University of Finance and Economics,Kunming 650221,China;School of Geography and Tourism,Zhaotong University,Zhaotong 657000,China)
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
2021年第11期277-284,共8页
Transactions of the Chinese Society of Agricultural Engineering
基金
教育部人文社科基金“新型城镇化背景下滇中城市群生态用地重要性识别与格局优化研究”(20XJAZH005)。
关键词
模型
景观
生态系统服务功能
关键性生态用地
滇池流域
models
landscape
ecosystem service function
critical ecological land
Dianchi watershed
