Xinyi Shi, Qinghui Huang , Jing Nan, Jianhua Li, Changtao Yang *
College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China.
Conclusions
The present study revealed that the 2-MIB outbreak in East Taihu Lake was closely related to Pseudanabaena sp. In the macrophyte-abundant PAA and WA, 2-MIB concentration was significantly lower (p < 0.001) than in the phytoplankton dominated OWA. This result indicated that the macrophyte-dominated state could mitigate the odor issues in shallow lakes.The causes of Pseudanabaena outbreak and high 2-MIB were associated with eutrophication (high TP), seasonal gradients(high WT), water clarity (high turbidity, low-light conditions), and hydrometeorological processes. Based on risk assessment, the risk of 2-MIB exceeding 10 ng/L in lake water is up to 90% if the cell density of Pseudanabaena is >1.8 × 107cells/L.