We thank Dr. Duncan Jackson, Associate Professor Jinrong Xie, and David Hooper for their useful comments and language
editing, which have greatly improved the manuscript. Professor S. B. Zhou provided assistance with identifying macrophyte
species and algal types. This study was supported by National Natural Science Fund of China (30900186), Cultivation Plan of
Outstanding Undergraduate Graduation Thesis of Anhui Normal University (pyjh2014303), and Science and Technology Fund
of Anhui Province for Studying Abroad.