THE CHARACTERISTICS OF THE BIOLOGICAL RESOURCES AND THE EVALUATION OF THE WETL AND ECOSYSTEM IN DONGTING LAKE AREA

The Dongting Lake area is the largest lacustrine wetland ecosystem in China,where biological resources are very plentiful,which include 1428 species of plants,216 species of birds, 119 species of fishes,27 species of amphibians and retile,22 species of mammals and a great number of other wild living things.According to the distribution of biological resources,the lake wetland ecosystems,are classified into lake-surrounding hill ecosystem,grass-strand ecosystem,lake-beach ecosystem,shallow-water ecosystem,and deep-water ecosystem.The functions of those ecosystems are evaluated with their dircet and indirect utilizable values,the exsting problems of the protection and development of wetland biological resources are analysed,and some suggestions are put forward.