Funding for this research was provided by:
the National Natural Science Foundation of China (31300644)
Fundamental Research Funds for the Central Universities (KJQN201424)
the State Key Laboratory Program of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences (2014SKL009)
Article History
Received: 5 August 2017
Revised: 7 December 2017
Accepted: 7 December 2017
First Online: 11 May 2018