基于土地利用动态变化的洱海流域上游生态系统服务价值分析  

Analysis of Ecosystem Service Values in the Upper Erhai Lake Basin Based on Dynamic Changes in Land-use

作　　者：董亚坤 郭羽鑫 吴碧兰 曾维军 DONG Ya-kun;GUO Yu-xin;WU Bi-lan;ZENG Wei-jun(College of Water Conservancy,Yunnan Agricultural University,Kunming 650201,P.R.China;Engineering Research Center of Land and Resources Science and Technology,Yunnan Agricultural University,Kunming 650201,P.R.China;College of Resources and Environment,Yunnan Agricultural University,Kunming 650201,P.R.China)

机构地区：[1]云南农业大学水利学院,云南昆明650201 [2]云南农业大学国土资源科学技术工程研究中心,云南昆明650201 [3]云南农业大学资源与环境学院,云南昆明650201

出　　处：《水生态学杂志》2023年第1期16-24,共9页Journal of Hydroecology

基　　金：国家自然科学基金(41961040)。

摘　　要：为探究洱海流域上游土地利用动态变化趋势及其与生态系统服务价值(ESV)的关系,以Landsat TM/OLI遥感影像为基础,解译得到2000年、2005年、2010年、2015年和2019年共计5期土地利用数据,运用转移矩阵、土地利用动态度、改进的生态系统服务价值当量因子等方法,分析洱海流域上游土地利用变化规律、生态系统服务价值动态趋势及其相互影响。结果显示:(1)耕地、林地和草地是研究区主要的土地利用类型和土地转换类型,其他用地动态度最高(13.76%),草地最低(-2.17%);(2)运用改进的价值当量因子核算研究区ESV,其一级服务功能为调节服务>支持服务>供给服务>文化服务,二级服务功能中,水文调节的ESV最高,维持养分循环最低;(3)20 a洱海流域上游林地和草地的ESV最高,总体呈上升趋势,林地、草地和水域是主要的贡献因子和敏感因子。林地、草地和水域分别在2000-2005年、2010-2015年、2015-2019年生态贡献率最高,为62.62%、64.12%、53.66%;(4)各地类转入转出变化与其ESV变化呈线性关系,林地、草地和水域面积的转入和转出是影响洱海流域上游ESV变化的主要原因。研究表明,洱海流域上游总体土地利用开发需求相对较低,生态环境不断改善,ESV呈现不断上升趋势。In this study,we analyzed trends in land use dynamics in the upper Erhai Lake basin and its relationship with ecosystem service values (ESV) in the basin.The study was based on Landsat TM/OLI remote sensing images from five years of land use data (2000,2005,2010,2015 and 2019).The transfer matrix,land use dynamics,and equivalent factors for improved ecosystem service values were used to analyze land use change patterns,dynamic trends of ecosystem service values,and their interac?tions in the basin.The aim was to provide a reference for protecting the ecological environment and treating non-point pollution in the Erhai Lake basin.Results show that:(1) Forestland,grassland,and cultivated land were the primary land-use types and land transition types in the study area.The dynam?ic degree of“other land-use”type was the highest (13.76%),while the dynamic degree of grassland(-2.17%) was the lowest.Over the 20 year period,the total area of cultivated land and grassland de?creased,while forestland increased.Grassland area decreased the most (102.734 km^(2),8.83%),while forestland increased the most (122.519 km~2,10.34%).(2) The ESV of different land-use types was cal?culated according to improved ecosystem service value equivalent factors in the study area,and the ESV of the primary service functions followed the order,regulation service>supporting service>sup?ply service>cultural service,and the secondary service functions with the highest ESV was for hydro?logical regulation and the lowest was for maintaining nutrient cycles.(3) The ESV of forestland and grassland in the upper Erhai Lake watershed was highest over the 20 year period,with an overall up?ward tendency.The primary contribution and sensitive factors were forestland,grassland,and water which had the highest ecological contribution rates of 62.62%,64.12%and 53.66%,respectively,over the periods of 2000-2005,2010-2015,and 2015-2019.(4) There was a linear relationship between the change of ESV and the transfer areas,in and out,of each land-use type.The trans

关 键 词：土地利用 生态系统服务价值 洱海流域 

分 类 号：X826[环境科学与工程—环境工程]