Wenjun Chen, Jinling Institute of Technology, China; Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, China, Bin He, Guangdong Institute of Eco-environmental Science and Technology, China, Nanjing,Jiangsu, China, Haw Yen, Texas A & M University College Station, College Station, TX, United States, Pingping Luo, Chang'an University, China, Xi'an, China and Daniel Nover, University of California Davis, Davis, CA, United States