Changes in microcystin content and environmental parameters over the course of a toxic cyanobacteria bloom in a hypertrophic regulated river, South Korea.

Autor: Jung JM; Pusan Water Quality Institute, Waterworks HQ, Busan, 617-042, South Korea. jmjung4356@empal.com, Lee YJ, Park HG, Jung EY, Jang MH, Ha K, Shin PS, Joo GJ
Jazyk: angličtina
Zdroj: Journal of environmental biology [J Environ Biol] 2005 Jan; Vol. 26 (1), pp. 97-103.
Abstrakt: 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.
Databáze: MEDLINE