Study On The Mangrove Wetland Ecosystem Service And Its Valuation

Mangrove wetland ecosystem provides important valuations including economic, social and cultural benefits. With the further study of wetland, the service of wetland ecosystem is becoming more and more important. Ecological value assessment of wetland is a monetary measured proceeding of its ecosystem services. These methods using economic analysis would become a effective policy measure, not only to punish the destroyer but also to compensate the losing. This paper takes Mangrove natural reserve in Zhangjiang River Estuary as a case study, describing natural conditions, social conditions, ecosystem services, ecological economical valuation, human utilization mode and so on. The main contents are as follows:Mangrove natural reserve in Zhangjiang River Estuary maintains good natural conditions, but the general economy conditions there is not well. Primary Industries are still the mainstay of the national economy. The services provided by .this mangrove wetland ecosystem include production of goods, protection against floods, regulation services, biodiversity, social and cultural information. We use main approaches to obtain these ecological economical valuations, containing Market value approach, Opportunity cost method, Shadow project method, Changes in productivity approach, Human capital approach, Travel cost method, Hedonic valuation method, Contingent valuation method, Ecological value method. The total value of the mangrove wetland ecosystem services in Zhangjiang River Estuary is 27,632,556 yuan RMB per year [11,709 yuan RMB/(hm2·a)] based on the economical background of the region in 2005. Among them the value of production of goods is 15,398,092 yuan RMB per year, the value of protection against floods is 6,477,275 yuan RMB per year, the value of regulation services is 4,152,488 yuan RMB per year, the value of biodiversity is 879,941 yuan RMB per year, the value of social and cultural information is 724,760 yuan RMB per year. The value of all these services from more to less is the value of production of goods, protection against floods, regulation services, biodiversity, social and cultural information. The low total value has respect to poor general economy conditions and people's material life. Nowadays, the protection and sustainable using of Mangrove wetland ecosystem in Zhangjiang River Estuary still remain some problems that should be improved by management mechanism, legal system, public participation, etc.