| Yeyahu wetland is Beijing’s ecological barrier, and an important guarantee for the sustainable economic development and the coordinated development of society, population, resources and environment. Studying Yeyahu wetland land-use and its ecological changes in the value of the entire economic, ecological sustainable development has important theoretical and practical significance.This study analyzed the dynamic changes of land use and its ecological changes in the value of economic from1999to2009. According to the specific characteristics of the existing ecosystem services research in Yeyahu, combined with the actual situation of the study area and the availability of the data, the ecosystem of the study area per unit area of ecosystem services value correction index system was build. This paper then discussed the relationship between land use and ecosystem services, ecosystem services and economic growth. Finally, use grey comprehensive relationship to analysis the driving mechanism for the evolution of wetland degradation. The results show that:(1) Yeyahu various types of land changed in different degrees. From the land use classification, changes in the water area was the largest, followed by forestland, then, grassland, residential areas almost unchanged.(2) From ecosystem services valuation results, we could find out that Yeyahu wetland ecosystem services decreased of5.483billion in1999-2009, average rate of reduction was2.591%. It presented degradation trend, which was closely related to both natural factors and human disturbance.(3) Various lands’value of ecosystem services was closely related to the total reduction in the value of ecosystem services. The water and the arable land had the highest ecosystem service’s interrelatedness, woodland and grassland ecosystem services associated with a high degree, and finally unused land.(4) CS was between0.009-0.78, it indicated that the value of the revised coefficient of the study area is more appropriate, the results were credible. |
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