title: Changes in microcystin content and environmental parameters over the course of a toxic cyanobacteria bloom in a hypertrophic regulated river, South Korea.
abstract: Cyanobacterial blooms and associated microcystins in hypertrophic stagnant West-Nakdong River were investigated at weekly intervals from April to August, 1999. Microcystis spp. accounted for over 85% of the numeric abundance of total phytoplankton. Microcystins were present in the blooms sampled between May and August. The peak of total microcystin (microcystin-LR + -RR) levels (maximum level; 612 microg g(-1)) was detected in the initial stage of the bloom (mid May), at the same time as high N/P ratio and high Microcystis biomass. This study indicated that total microcystins of this regulated river was positively correlated to Microcystis biomass, absolute nutrient concentration and TN/TP ratio.
authors.affiliation: Pusan Water Quality Institute, Waterworks HQ, Busan, 617-042, South Korea. jmjung4356@empal.com
authors.forename: Jong-Mun
authors.initials: JM
authors.lastname: Jung
authors.forename: You-Jung
authors.initials: YJ
authors.lastname: Lee
authors.forename: Hong-Gi
authors.initials: HG
authors.lastname: Park
authors.forename: Eun-Young
authors.initials: EY
authors.lastname: Jung
authors.forename: Min-Ho
authors.initials: MH
authors.lastname: Jang
authors.forename: Kyong
authors.initials: K
authors.lastname: Ha
authors.forename: Pan-Se
authors.initials: PS
authors.lastname: Shin
authors.forename: Gea-Jae
authors.initials: GJ
authors.lastname: Joo
mesh_terms: D000458:Cyanobacteria / Q000737:chemistry / Q000254:growth & development*; D017753:Ecosystem; D007723:Korea; D052998:Microcystins; D010456:Peptides, Cyclic / Q000032:analysis*; D045483:Rivers; D014871:Water Microbiology
chemical_list: D052998:Microcystins; D010456:Peptides, Cyclic; C078588:microcystin