Ecosystem-service-value-assessment-for-constructed-wetlands

ANALYSISEcosystemservicevalueassessmentforconstructedwetlands:AcasestudyinHangzhou,ChinaWuYanga,JieChanga,⁎,BinXub,ChanghuiPengc,a,YingGea,⁎aCollegeofLifeSciences,ZhejiangUniversity,Hangzhou310058,PRChinabDepartmentofPublicAdministration,ZhejiangGongshangUniversity,Hangzhou310018,PRChinacInstitutdessciencesdel'environnement,Départementdessciencesbiologiques,UniversitéduQuebecàMontréal,Casepostale8888,SuccursaleCentre-Ville,Montréal,QC,CanadaH3C3P8ARTICLEINFOABSTRACTArticlehistory:Received30September2007Receivedinrevisedform10February2008Accepted10February2008Availableonline14March2008Basedonacomprehensiveanalysisofvariousclassificationsofnaturalresourcevalues,wesummarizedanecologicaleconomicvaluesystemofconstructedwetland(CW)ecosystemsfortreatingeutrophicwater.UsingtheCWlocatedattheHangzhouBotanicalGardenasanexample,thecontingentvaluationmethod(CVM)andshadowprojectapproach(SPA)wereappliedtoestimatetheeconomicvaluesofCWsystemecosystemservices.TheCVMestimatedavalueof800,000yuan(yuan:ChineseCurrency,7.6yuan=1USDasofAugust,2007)asthetotaleconomicvalueoftheCWinatwentyyearperiod.Meanwhile,theSPAcalculatedavalueof23.04millionyuanasthetotaleconomicvalueoftheCWinatwentyyearperiod.ItisdeterminedthatcomparedtotheCVM,theSPAprovidesamoreapproximatevalueofthetruemonetaryvalueoftheHangzhouBotanicalGardenCW.ThisstudycouldfillthegapofknowledgeandprovideabenchmarkwhenevaluatingconstructedecosystemservicesandhelppolicymakerstopromotethedevelopmentofconstructedwetlandsinChina.©2008PublishedbyElsevierB.V.Keywords:ContingentvaluationmethodCost-benefitanalysisEconomicvaluationShadowpriceShadowprojectapproachWillingnesstopay1.IntroductionEcosystemservicesrepresentthebenefitsthatpeopleobtaindirectlyorindirectlyfromecosystems(Costanzaetal.,1997;MA,2003).Assessingtheeconomicvaluesofecosystemservicesplayvariousandimportantrolesinlinkinghumanactivityandnaturalsystems.Asaspecificinterdisciplinaryfieldofpractice,theremarkableworkofDaily(1997)andCostanzaetal.(1997)hasmadeabreakthroughinecosystemse