There was an error in the Funding statement.
The correct statement is: This study was jointly supported by the National Basic Research Program of China (973 Program) (2008CB418101) [http://www.973.gov.cn/AreaAppl.aspx], National Water Pollution Control and Management Technology Major Project (2012ZX07101-010) [http://nwpcp.mep.gov.cn/] and State Key Laboratory of Freshwater Ecology and Biotechnology (2011FBZ07) [http://eastlake.ihb.ac.cn/]. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.
Footnotes
Competing Interests: No competing interests declared.
