title: Cyanobacteria-/cyanotoxin-contaminations and eutrophication status before Wuxi drinking water crisis in Lake Taihu, China.
abstract: After the appalling "Wuxi Drinking Water Crisis", increasing investigations concerning the contaminations of cyanobacterial blooms and their toxins in Lake Taihu have been performed and reported in the last two years. However, information regarding these issues before the crisis in 2007 remained insufficient. To provide some background data for further comparisons, the present study reported our investigations conducted in 2004, associated with the cyanotoxin contaminations as well as the eutrophication status in Lake Taihu. Results from the one-year-study near a drinking water resource for Wuxi City indicated that, unlike the status in recent two years, cyanobacteria and chlorophyta are the co-dominance species throughout the year. The highest toxin concentration (34.2 ng/mL) in water columns occurred in August. In bloom biomass, the peak value of intracellular toxin (0.59 microg/mg DW) was determined in October, which was lag behind that in water column. In addition, MC-RR was the major toxin variant throughout the year. During the study period, nutrients levels of total nitrogen and phosphorus were also recorded monthly. Results from the present study will lead to a better understanding of the eutrophication status and the potential risks before "Wuxi Drinking Water Crisis".
authors.affiliation: College of Pharmacy, Wuhan University, Wuhan 430071, China. ymliu@whu.edu.cn
authors.forename: Yongmei
authors.initials: Y
authors.lastname: Liu
authors.forename: Wei
authors.initials: W
authors.lastname: Chen
authors.forename: Dunhai
authors.initials: D
authors.lastname: Li
authors.forename: Zebo
authors.initials: Z
authors.lastname: Huang
authors.forename: Yinwu
authors.initials: Y
authors.lastname: Shen
authors.forename: Yongding
authors.initials: Y
authors.lastname: Liu
mesh_terms: D001427:Bacterial Toxins / Q000032:analysis*; D002681:China; D002734:Chlorophyll / Q000378:metabolism; D000458:Cyanobacteria / Q000302:isolation & purification*; D005068:Eutrophication; D005618:Fresh Water / Q000382:microbiology*; D005843:Geography; D007536:Isomerism; D052998:Microcystins / Q000032:analysis; D009584:Nitrogen / Q000032:analysis; D010758:Phosphorus / Q000032:analysis; D010839:Phytoplankton / Q000254:growth & development; D014874:Water Pollutants, Chemical / Q000032:analysis*; D014876:Water Pollution / Q000032:analysis*; D014881:Water Supply / Q000032:analysis*
chemical_list: D001427:Bacterial Toxins; D052998:Microcystins; D014874:Water Pollutants, Chemical; D002734:Chlorophyll; D010758:Phosphorus; D009584:Nitrogen