关键词: 湿地, 生态承载力, 生态文明建设, 长江中下游

Abstract:

In the view of ecological civilization construction, a new connotation of regional ecological carrying capacity is proposed, the evaluation system of ecological carrying capacity of the wetland in the middle and lower reaches of Yangtze River is constructed from three aspects of ecological support force, pressure of resources and energy consumption and pressure of environment pollution discharge, a state space model and a human and natural coupled system model are established, so as to evaluate the ecological carrying capacity of the wetland in the middle and lower reaches of Yangtze River in 2010 quantitatively. The results indicate that:(1) four counties including De'an, Jinxian, Nanxian and Yongxiu are overload and imbalance areas, 10 counties such as Xinjian etc. are carrying but imbalanced areas, 10 counties such Jinxian, Wuhan etc. are carrying and comparatively balanced areas, 15 counties or cities such as Anqing etc. are slight overload and comparatively balanced areas. (2) All the overload and imbalanced areas are located in the wetland areas of Dongting Lake and Poyang Lake while the ecological carrying but imbalanced areas are dispersed, which are located in the wetland area of Yangtze River stem and the eastern area of Poyang Lake wetland area. (3) The social and economic pressure characteristics of the counties in wetland area of Dongting Lake and Poyang Lake, Jianghan Lake group and middle and lower Yangtze River wetlands are pollution pressure. Based the analysis results, the development suggestions are put forward.

Key words: wetland, ecological carrying capacity, ecological civilization construction, middle and lower reaches of the Yangtze River