Conversion Efficiency Of Chinese Lake Wetland Ecosystem Services Of Value Based On Estimates

Wetlands ecosystem was considered as one of the world’s three major ecosystems, which has the fullest biodiversity condition on the earth and the most important living environment for human-beings. Wetlands have unique ecosystem benefit and service functions, not only providing goods and foods, but also having tremendous regulative services and supportive functions. Wetlands play important roles in climate regulation, water storage, hydrological regulation, waste treatment, biodiversity, and so on. China has abundant wetland types and area all over the world. Due to the pollution, over hunting, reclamation et al., wetlands function and their benefit are getting declined by years, the habitat of animals and plants was destroyed.Wetland ecosystem services and their valuation are getting more and more attention in recent years. On one hand, with the development of population and economy, natural ecosystems is getting more and more demanded, people are heavily rely on the ecosystem. On the other hand, the situation that the continuous increase form natural ecosystem is getting complicated, due to the over hunting form wetlands, civilization, and pollution, et al., wetlands recourse is degenerated at global scale. The conflict between natural recourse and human benefit is becoming more and more serious. How to evaluate and balance the types of wetlands ecosystem services to human society? How to value the contribute wetlands provided to society and economic, thus to provide guiding assistance in policy making? All above are relating to the field of natural science, economy and society, and also a complicated philosophical subject, should be considered at multi-disciplinary way. Wetlands ecosystem service research is the basic point in value research; the valuation result is expressed in monetary form, which links the economics and ecology theory. The research result is meaningful to the benefit of society and economic, thus promote the activities for human well-beings in the future.The main contents of this thesis are as follows:1、Combining the frontier research about ecosystem and ecosystem service research, based on the environmental feature of Chinese wetland resource, this thesis analysis the wetlands ecosystem service and the economic theory and method of wetlands monetary valuation.2、Introducing the methodology of wetlands ecosystem benefit transfer, which includes the origin, classification of value transfer, the theory and method of adjusted unit value transfer, the theory of Meta regression method, the application of GIS technology in natural resource.3、Based on the adjusted unit value transfer, to evaluate the total economic value of lake and marsh wetlands in china. After comparing the unit value between the research result by Costanza et al., and Xie gaodi et al., this thesis choose Xie’s research result as the basic unit value. Then this paper adjusted the unit value by the impact factors such as economic-population factor, biodiversity factor, thus obtain the total valuation result of lake and marsh wetlands ecosystem of China.4、Based on the Meta-analysis method to evaluate the lake and marsh wetlands ecosystem service valuation in China. Through the research and collection of related literature about ecosystem services valuation,80case study sites were set up and geo-database were founded. The valuation method and average unit area was compared though case studies, thus the total ecosystem services of lake and marsh wetland in China was scaled up. After comparing the adjusted unit value transfer and Meta regression value transfer, the possible error during value transfer was discussed.The main research achievements are as follows:Referring to the advanced research in wetland ecosystem and service valuation research, this paper summarized Chinese wetland ecosystem and its function and services; based the case studies of the valuation sites, analysis the support, supply, regulation and culture services of wetland ecosystem, and the economic method at monetary valuation of wetland ecosystem services.Discussing the application of benefit transfer at wetland ecosystem services valuation, based on the current adjusted unit value of wetland ecosystem from domestic and international research, adjusting the unit value by the spatial analysis on GIS platform, calculating the total wetland valuation results of lake and marsh of China in2008, thus the valuation result is5683.1×108yuan/yr. Import Meta analysis method, through case research and collection of wetland valuation at national scale, analysis the characteristics of lake and marsh wetland in China and its valuation method, found the geo-database of case study, then multiple regression model were established to implement the scale up of value and realize the total valuation of lake and marsh wetlands in China,2008, thus obtain the valuation result is8137.1×108yuan/yr.The innovation points of the paper are as follows:Benefit transfer is an available and effective method for natural resource valuation at large geographical scale. Through the application of value transfer, especially the principle research of adjusted unit value method and Meta-regression method, this paper calculated the total value of lake and marsh wetland in China.Adjusted unit value method referenced the updated research result about natural resource valuation both at home and abroad, based on the specialty of Chinese wetland, the economic and society condition, using spatial analysis and data processing method at GIS platform, series of adjusted method were realized. Based on the research and collection of wetlands valuation sites at national scale, Meta-regression method carried out the multivariate statistical analysis using SPSS software, thus realized the scale up of valuation and get the total value of lake and marsh wetlands ecosystem value in China.