
TY  - JOUR
A1  - Ha, Kyong 
A1  - Cho, Eun-Ah 
A1  - Kim, Hyun-Woo 
A1  - Joo, Gea-Jae 
T1  - <emph type="2">Microcystis</emph> bloom formation in the lower Nakdong River, South Korea: importance of hydrodynamics and nutrient loading
JF  - Marine and Freshwater Research
JO  - Mar. Freshwater Res.
Y1  - 1999
VL  - 50
IS  - 1
SP  - 89
EP  - 94
KW  - cyanobacterial bloom, Microcystis aeruginosa, regulated river
UR  - https://doi.org/10.1071/MF97039 
N2  - A cyanobacterial bloom in the lower part of the Nakdong River was investigated during the dry summer of 1994. High levels of phytoplankton biomass, mainly Microcystis aeruginosa, in the surface waters (chl. &#945; 193 &#177; 436 &#181;g L-1, mean &#177; s.d.; &#62;105 cells mL-1 , n = 15) were maintained for three months from mid July to mid October. After the last major rainfall in mid June, water temperature increased sharply within three weeks (18 June, 24&#176;C; 9 July, 33&#176;C). The highest cell density (5 &#215; 106 cells mL-1) and highest concentration of chl. &#945; (&#62;500 &#181;g L-1) in the surface water were recorded in the early phase of the bloom (21&#8211;26 July) as the drought persisted. Concentrations of dissolved inorganic nitrogen (DIN) and total phosphorus (TP) during the bloom were high (DIN 2.5 &#177; 0.9 mg L-1 ; TP 155 &#177; 98 mg L-1 ; n = 23). pH was low (~7) until the initial stage but was high (pH &#62;9) as the bloom formed. Elevated water temperature (&#62;30&#176;C) along with low discharge and high irradiance were major factors contributing to the Microcystis spp. bloom in this river&#8211;reservoir system. 
ER  -

