Key Laboratory of Ecosystem Network Observation and Modeling;
Institute of Geographic Sciences and Natural Resources Research;
Chinese Academy of Sciences;
Beijing 100101;
China;
Graduate University of Chinese Academy of Sciences;
Beijing 100049;
China;
Donghu Experimental Station of Lake Ecosystems;
State Key Laboratory of Freshwater Ecology and Biotechnology of China;
Institute of Hydro- biology;
Chinese Academy of Sciences;
Wuhan 430072;
China;
Institute of Ecology;
Lund University;
Ecology Building;
SE-223 62 Lund;
Sweden;
Nanjing Institute of Geography and Limnology;
Chinese Academy of Sciences;
Nanjing 210008;
China;