J.Geogr.Sci.2023,33(4):823-844DOI:https://doi.org/10.1007/s11442-023-2108-8©2023SciencePressSpringer-VerlagEcologicalriskassessmentandecologicalsecuritypatternoptimizationinthemiddlereachesoftheYellowRiverbasedonERI+MCRmodelYANGLian’an1,2,3,LIYali1,2,3,JIALujing1,2,3,JIYongfan1,2,3,HUGuigui1,2,31.ShaanxiKeyLaboratoryofEarthSurfaceSystemandEnvironmentalCarryingCapacity,NorthwestUniver-sity,Xi’an710127,China;2.YellowRiverInstituteofShaanxiProvince,NorthwestUniversity,Xi’an710127,China;3.CollegeofUrbanandEnvironmentalSciences,NorthwestUniversity,Xi’an710127,ChinaAbstract:ThemiddlereachesoftheYellowRiverrepresentanimportantareafortheprotec-tionanddevelopmentoftheYellowRiverBasin.MostoftheareaoftheriverbasiniswithintheLoessPlateau,whichestablishesitasafragileecologicalenvironment.Firstly,usinghigh-resolutiondataoflanduseinthewatershedfromthepast30years,landscapeecolog-icalrisk(LER)sampleunitsaredefinedandanecologicalriskindex(ERI)modeliscon-structed.KriginginterpolationisusedtodisplaytheLERspatialpatterns,andthetemporalandspatialevolutionofriskisexamined.Secondly,thespatialevolutionoflanduseland-scapechange(LULC)isanalyzed,andthecorrelationbetweenlanduselandscapeandecologicalriskisdiscussed.Finally,BasedontheLERmodel,arisk-basedminimumcumu-lativeresistance(MCR)modelisestablished,andacomprehensiveprotectionandman-agementnetworksystemfortheecologicalsource-corridor-nodesystemdesigned.There-sultssuggestthatinthepast30years,LERhasahighspatialcorrelationandareaswithextremelyhighecologicalrisksareconcentratedinnorthwestandsoutheastareasoftheregion,ofwhichthenorthwestareaaccountsforthehighestproportion.Riskintensityiscloselyrelatedtothespatialpatternoflanduselandscape.ERIvaluesofforestland,grass-lands,andunusedlandandfarmlandarelow,medium,andhigh,respectively.Thetrendofriskevolutionis“overallimprovementandpartialdeterioration”.Man-madeconstructionandexploitationisthemostdirectreasonfortheincreaseoflocalecologicalrisks.Thehigheco-logical-riskareasinthenorthwestaredomin...
