| Based on research progress on economic value of ecosystem services, taking Changsha for instance,the authors analyze the functions of ecosystem services such as conditioning climate, fixing carbon and releasing oxygen, preserving soil, keeping waterhead, purifying environment, and .restraining noises. Economic values of all the six kinds of ecological service functions are calculated. The results show that ecosystems in Changsha provide enomous ecological economic benefits with the total value of RMB 158 673 000 000, which corresponds with the RMB 151 990 000 000 of GDP of Changsha in 2005. Meanwhile, the importance of different ecosystem services in urban areas is different. The function of fixing carbon and releasing oxygen is the most important, the function of conditioning climate is the second, and preserving soil the functions of keeping water head, purifying environment, and restraining noises are the last important. As for the case study in Changsha, the functions of purifying environment and restraining noises are in great need of protection in urban landscape managenvent and ecological construction. Strengthening the endeavor of Greenland, etal, according to the andlysis of the existing problems of Changsha city. |
