基于CVM的闽江河口湿地生态系统非使用价值评价

Evaluating the non-use value of Minjiang estuary wetland ecosystem based on contigent valuation method

以东亚—澳大利西亚候鸟迁徙路线上重要的驿站——闽江河口湿地为例,运用支付卡式条件价值评估法(CVM),对该湿地生态系统的支付意愿进行面对面的问卷调查。共发放支付卡式CVM问卷500份,回收有效问卷482份,估算出闽江河口湿地生态系统的算术平均支付意愿值为151.16元/a,累计频度中位数为56.36元/a,支付意愿值相对分布频度曲线基本呈单调递减分布;考虑到本文目的是核算闽江河口湿地生态系统的经济价值,并为相关部门提供科学决策,因此,采用算术平均值计算其非使用价值,其值为5.01亿元/a;Spearman秩相关系数分析表明支付意愿与收入水平、受教育程度、年龄、性别和职业呈显著相关关系。

Taking Minjiang estuary wetland as a case study,which is an important post on the migration route of migratory bird from Eastern Asia to Australasia.The contingent valuation method（CVM） was used in this paper to evaluate the non-use value of the wetland.500 payment card CVM questionnaires were distributed and 482 were fed back as useful questionnaires.On the basis of the questionnaires,the mean willingness to pay（WTP） and the median to the wetland ecosystem were calculated.Which were 151.16 yuan（RMB） and 56.36 yuan（RMB） per person every year in future 5 years.The relative frequency distribution curve of the WTP was a monotonically decreasing distribution curve.Taking research purpose into account,mean WTP was adopted to evaluated the non-use value of the wetland,which was 5.01×108 yuan（RMB） per year.The impacts of factors on WTP were also analyzed by Spearman＇s rank correlation coefficient,which showed that WTP was related to income,educational level,age,gender,and profession of the respondents.