The major characteristics of degraded forest ecosystem in the upper reaches of the Yangtze River. Forest productivity notably descends, and biodiversity obviously reduces, even loses. In the Jia Lingjiang River, Tuojiang River and Fujiang River basin, plants grow slowly, storage capacity is less than to 15m\+3/hm\+2, forest is 30 years old or so,and biodiversity descends, the forest ecosystem type reduces and the quality falls, and some attached species degenerates even disappears.In forestland, the produ...