Green under siege: how the polyhexamethylene guanidine disinfectant attacks microalgae in aquatic ecosystems 1Nanjing Jiangning District Water Affairs Bureau, Nanjing, China 2Nanjing No. 1 Middle School, Nanjing, China 3High School Affiliated to Nanjing Normal University Jiangning Campus, Nanjing, China 4College of Environment, Hohai University, Nanjing, China 5Hohai University, Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Nanjing,...