基于最小累计阻力模型和情景模拟法的滇池流域最小生态用地量化对比研究  

Comparative study on the minimum ecological land quantification in Dianchi Lake Basin based on MCR model and scenario simulation method

作　　者：孙桐 雷冬梅 刘林 包广静 付袆 SUN Tong;LEI Dongmei;LIU Lin;BAO Guangjing;FU Hui(School of Finance and Public Administration,Yunnan University of Finance and Economics,Kunming 650221,China;Yunnan Key Laboratory for Plateau Mountain Land Use,Kunming 650221,China)

机构地区：[1]云南财经大学财政与公共管理学院,昆明650221 [2]云南省高原山地土地利用重点实验室,昆明650221

出　　处：《生态学报》2024年第20期9135-9145,共11页Acta Ecologica Sinica

基　　金：国家自然科学基金(42361049)。

摘　　要：最小生态用地是保障区域生态系统服务功能完整的关键性生态用地,量化最小生态用地对于维持区域生态系统健康与可持续发展具有重要意义。从最小生态用地的内涵解析出发,以生态系统服务功能视角为切入点,提出基于最小累计阻力模型(MCR)与情景模拟法的最小生态用地量化的研究框架,并以滇池流域为例进行实证分析。结果表明:(1)基于MCR模型,识别出研究区最小生态用地栅格数量为1275560,面积为1148.00km^(2),占流域生态用地面积50.68%,占流域总面积39.32%。(2)基于情景模拟法,比较占研究区总生态用地面积30%、40%、50%及60%的四种情景,识别出流域最小生态用地面积为1129.55km^(2),占流域生态用地面积50%,占流域总面积38.96%。(3)进一步对比分析发现:情景模拟法确定的最小生态用地在土地利用类型的分布特征方面表现出更高的稳定性和合理性,而在流域尺度上,MCR模型和情景模拟法确定的最小生态用地中占比最高的均为林地,分别为78.17%和47.32%;情景模拟法量化的最小生态用地的最大斑块面积指数、蔓延度指数及聚合度指数均大于MCR模型的,分别为10.62、39.57和93.39,表明情景模拟法确定的最小生态用地的优势斑块连接度更好,景观集聚程度更高,景观破碎度更小。The minimum ecological land is the key ecological land in a region,which can ensure that the regional ecosystems provide and maintain the integrity of important ecosystem services.Under the background of rapid urbanization,ecological land has been seriously occupied and destroyed,resulting in the decline of ecosystem services and even affecting the ecological security of the whole region.Therefore,quantifying the minimum ecological land is of great significance for maintaining the health and sustainable development of regional ecosystem.Taking Dianchi Lake Basin as an example,this paper firstly analyzed the connotation of the minimum ecological land.Secondly,from the perspective of ecosystem services,a research framework of the minimum ecological land quantification was proposed based on minimum cumulative resistance(MCR)model and scenario simulation method.Finally,landscape pattern index method was used to compare the quantitative results of the minimum ecological land of these two methods.The results are as follows:(1)Based on MCR model,the number of grids of the minimum ecological land in the study area is 1275560,with an area of 1148.00km^(2),accounting for 50.68%of the ecological land area and 39.32%of the total area of the basin.(2)Based on scenario simulation method,four scenarios accounting for 30%,40%,50%and 60%of the total ecological land area in the study area are compared,and the minimum ecological land area is identified as 1129.55km^(2),covering for 50%of the ecological land area and 38.96%of the total area of the basin.(3)Further comparative analysis reveals that the distribution characteristics of land use types of the minimum ecological land identified by scenario simulation method show higher stability and rationality than by MCR model.At the watershed scale,the land use type with the highest proportion of the minimum ecological land determined by MCR model and scenario simulation method are both forestland,which are 78.17%and 47.32%,respectively.In terms of landscape pattern characteristics,the

关 键 词：最小生态用地 最小累计阻力模型 情景模拟法 滇池流域 

分 类 号：X171.1[环境科学与工程—环境科学] F301.24[经济管理—产业经济]