The Analysis of Ecosystem Service Value's Change in Yueqing Bay Wetland Based on RS and GIS

摘要

To a certain content, ecosystem function is usually used to evaluate the quality of the ecological environment region and provide scientific reason for environmental protection & ecological construction. The landscape-use changes of Yueqing Bay were studied by Landsat5TM data in 1993 and 2003 with RS and GIS technology. We quantificationally analyzed and identified the change of landscape ecosystem's service value in Yueqing Bay wetland by computation index of ecosystem. The investigations indicated that the growing trend of ecosystem service value was reduced 4.38% in the whole research landscape area from 1993 to 2003. However, the increased growing trend of landscape was breeding paddy fields and farmlands. It was respectively increased to 31.25% and 1.78%. However, the growing trend of water area, seas, shallows and forests has been declined, and the biggest declination was the forest which reached 10.09%. In the past 10 years, the landscape type in Yueqing Bay wetland has been changed to cause the decline of ecosystem service value for this area. Therefore, the result demonstrated that the ecological environment of Yueqing Bay has been deteriorated, and the protective measures need to be taken in this area as soon as possible.