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퇴적층 배양에 따른 식물플랑크톤 군집 형성과 이취미물질 발생 특성
김용진 ( Yong Jin Kim ),윤석제 ( Seok Jea Youn ),김헌년 ( Hun Nyun Kim ),박응로 ( Eung Roh P가 ),황문영 ( Moon Young Hwang ),박진락 ( Jin Rak Park ),이병천 ( Byoung Cheun Lee ),이재관 ( Jae Kwan Lee ) 한국물환경학회 2014 한국물환경학회지 Vol.30 No.6
In this study, Uiam-sediment(US) and Gongji-sediment(GS) were incubated to analyze the formation of phytoplankton community and occurrences of odorous compounds from benthic cyanobacteria. For the phytoplankton, 45 and 40 taxa were found in GS and US, respectively. The phytoplankton species detected in the harmful algae included Microcystis, Anabaena and Oscillatoria. As a result, a standing crop of phytoplankton appeared to be in the range of 0.9∼71.8×103 cells/mL in GS, 0.8∼51.2×103 cells/mL in US, and as the incubation progressed, benthic cyanobacteria was increased. The highest number of akinetes was shown in the initial incubation, and akinetes was reduced by 10% on day 4 of incubation start. After reduction of akinetes incubated for 4 days in US and 15 days in GS, Anabaena appeared from the surface water. Benthic cyanobacteria such as Oscillatoria tenuis, O. limosa and Lyngbya hieronymusii was dominant in GS(max. 3.96×106 cells/cm2) and US(max. 5.77×106 cells/cm2), forming cyanobacterial mats in sediment surface. Cyanobacterial mats were suspended after 10∼12 days incubation in GS and US. Before and after the suspension of cyanobacterial mats, the concentration of geosmin was the highest in GS(115 ng/L) and US(175 ng/L). In the second suspension of cyanobacterial mats in GS, the concentration of 2-MIB was increased to the range of 22~92 ng/L.
김용진 ( Yong-jin Kim ),백준수 ( Jun-soo Baek ),윤석제 ( Seok-jea Youn ),김헌년 ( Hun-nyun Kim ),이병천 ( Byoung-cheun Lee ),김귀다 ( Guee Da Kim ),박송은 ( Song Eun Park ),유경아 ( Kyung A You ),이재관 ( Jae-kwan Lee ) 한국물환경학회(구 한국수질보전학회) 2016 한국물환경학회지 Vol.32 No.3
We analyzed cyanobacterial community including akinete, resting cell, and benthic cyanobacteria in sediment of Bukhan, Namhan-River, Paldang-Lake, and Kyeongan-Stream and compared the physicochemical factors for water and pore water. We also performed cyanobacteria growth potential test through incubating sediment. As a result of physicochemical analysis, the concentrations of nutrients were similar for each depth of Bukhan-River. For Namhan-River and Lake Paldang sites, the concentrations of TP and DTN in bottom and deep water had higher levels. DTN in water body composed of NO3-N(73%) while DTN in pore water composed of NH3-N(77.8%). Benthic cyanobacteria in the sediment such as Oscillatoria tenuis, O. limosa, Phormidium tenue, Pseudanabaena limnetica, and Lyngbya sp. were dominant (between 0.0~243.3×103 cells/g, w/w). Cell densities of cyanobacteria in sediment depth of 0~2 cm in most sites were higher compared to those in other depths. The cell density of cyanobacteria in sediment correlated with pH, conductivity, BOD5, TP, DTP, and chl. a. Increased phytoplankton and organic matters were found to be able to inhibit the growth of benthic cyanobacteria. Results of cyanobacteria growth potential test after incubating sediment revealed that harmful cyanobacteria (Anabaena, Aphanizomenon, Microcystis, and Oscillatoria) appeared at 7 days post culturing. Base on these results, the methods used in this study are considered to be able to determine the appearance of harmful cyanobacteria.
한국산 유독 남조류의 독소함량을 근거로 한 조류경보제 발령기준 검토
박혜경 ( Hae Kyung Park ),김화빈 ( Hwa Bin Kim ),이재정 ( Jay J. Lee ),이재안 ( Jae An Lee ),이혜진 ( Hae Jin Lee ),박종환 ( Jong Hwan Park ),서정관 ( Jung Kwan Seo ),윤석제 ( Seok Jea Youn ),문정숙 ( Jeong Suk Moon ) 한국물환경학회 2011 한국물환경학회지 Vol.27 No.4
We investigated the ranges of total cellular microcystins content of cyanobacterial blooms collected in Korean lakes and rivers from 2005 to 2009. The amount and composition of microcystins of Korean cyanobacteria varied depending on the sampling water bodies and dominant cyanobacterial genera. Toxic cyanobacterial cell numbers equivalent to 1 μg MCYSTs/L using total cellular microcystin content of Korean cyanobacteria were in the range of 2,348 to 66,980,638 cells/mL. Only four samples among forty nine samples showed less cell numbers than current criterion of Harmful Algae Alert System, 5,000 cells/mL indicating current criterion do not reflect properly the microcystins content of Korean cyanobacteria. Anabaena and Aphanizomenon spp. showed three to six times higher cell numbers equivalent to 1 μg MCYSTs/L than Microcystis spp. To propose criteria of Harmful Algae Alert System for Korean toxic cyanobacteria, we calculated about 50% selective geometrical means of cyanobacterial cell numbers equivalent to 1 μg MCYSTs/L in order of toxic content. The proposed criteria for Microcystis, Oscillatoria, Anabaena, and Aphanizomenon spp., are 10,000, 20,000, 40,000, and 80,000 cells/mL, respectively.