1. State Key Laboratory of Lake Science and Environment Nanjing Institute of Geography and Limnology Chinese Academy of Sciences Nanjing China
2. College of Geography and Environment Shandong Normal University Ji'nan China
3. Department of Geosciences University of Arizona Tucson AZ USA
4. State Key Laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and Palaeontology and Center for Excellence in Life and Paleoenvironment Chinese Academy of Sciences Nanjing China