9Suffling R. An index of ecological sensitivity to disturbance, based on ecosystem age, and related to landscape diversity [J]. Journal of Environmental Management, 1980, 10(3): 253 - 262.
10LIU Xuehua, SUN Yam Evaluating and structuring indicators for wetland assessment [J]. Frontiers of Environmental Science and Engineering in China, 2010, 4(2): 221 227.