To evaluate the relationship between dynamics of cyanobacteria and odorous compounds, a monthly monitoring of water quality and phytoplankton were conducted at the three serial lakes (Lake Ui-am, Lake Cheong-pyeong and Lake Pal-dang) in the North Han River for 11 times from May 2014 to March 2015. In the three serial lakes, phytoplankton communities showed that seasonal changes in Bacillariophyceae- Cyanophyceae-Bacillariophyceae. Anabaena and Pseudanabaena were dominant species in August and September 2014. At the same time the odors (Geosmin, 2-MIB) were also detected with high concentration. Relationship between environmental factors and cyanobacterial abundance showed a significant correlation with Anabaena circinalis and geosmin (r=0.983, p<0.01). In the case of Pseudanabaena limnetica showed a significant correlation of total nitrogen (r=0.685, p<0.01) and NO3-N (r=0.723, p<0.01). In addition, similarly Pseudanabaena limnetica and 2-MIB (r=0.717, p<0.01) was high. The odorous compounds appeared in the North Han River water were considered to be a direct relationship with cyanobacteria.

• 변정환(국립환경과학원 한강물환경연구소) | Byun, Jeong-Hwan
• 황순진(건국대 환경과학과) | Soon-Jin Hwang
• 김백호(한양대학교 생명과학과) | Baik-Ho Kim
• 박진락(국립환경과학원 한강물환경연구소) | Jin-Rak Park
• 이재관(국립환경과학원 한강물환경연구소) | Jae-Kwan Lee
• 임병진(국립환경과학원 한강물환경연구소) | Byung-Jin Lim Corresponding author