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이옥민 경기대학교 기초과학연구소 2008 기초과학논문집 Vol.21 No.-
The study was the research about the epilithic diatoms and physco-chemical factors of North Han river and Soyang river of Yuam lake. The density of Chlorophyll-a showed from site 4 showing the highest value and the rest of sites showed 2.0-9.4ug·cm^(-2), and its values are a relatively low value. T-N was 1.67- 6.44mg·ℓ^(-1) showing from site 4 the highest value. T-P was 0.027-0.117mg·ℓ^(-1) showed the highest value from site 3. The DAIpo from Site 1 was 61.5, showing the highest value and rest of sites was from 35.5 to 56.1. When DAIpo was divided into grades from A to D, site 1 and 6 were B, site 2 and 5 were C, and site 3 and 4 were grade D. TDI was the highest; 93.9 from site 4, and the rest sites were 43.1- 78.1. In the grades of TDI, site 1,2,5, and 6 were grade B and site 3 and 4 showed grade D. As shown above, DAIpo and TDI did not match in site 2 and 5, and the water was relatively polluted compared to la and Ib in BOD. The difference among BOD DAIpo, and TDI signifies that there has been a change in the indicator community, It can be concluded for DAIpo and TDI to be used together to determine the water pollution because DAIpo is instable with the water quality determination of the water mixed area.
이옥민 국립생물자원관 2022 Journal of species research Vol.11 No.1
Two strains of cyanobacteria were isolated from the soil of Seodaemun-gu, Seoul and from the gravel of the Ansung Stream, Gyeonggi Province, Korea, respectively. They were identified as Pantanalinema rosaneae and Alkalinema pantanalense under the Leptolyngbyaceae through the morphological, ecological, and molecular analyses and first reported in Korea. Belonging to the Leptolyngbya morphotypes, they are thin filamentous cyanobacteria and morphologically indistinguishable cryptic species. The strains of P. rosaneae and A. pantanalense isolated in Korea revealed the same cluster as their type species in the phylogenetic analysis using the 16S rRNA gene sequences, and similarities in the secondary structures of 16S-23S ITS sequences. Although both P. rosaneae and A. pantanalense were collected from water samples in the Pantanal wetland of Brazil, the P. rosaneae obtained in Korea, was soil-dwelling subaerophytic species whereas A. pantanalense was epilithic species living on gravel in the freshwater. Therefore, they are considered to have an extensive habitat
전남 갈곡천과 인천강 하구역의 식물플랑크톤의 분포 및 현존량
이옥민,유미선,이병인,임안숙,Lee, Ok-Min,Yoo, Mi-Sun,Lee, Byung-In,Lim, An-Suk 한국조류학회(藻類) 2008 ALGAE Vol.23 No.4
Species composition, standing crop and dominant species of phytoplankton were investigated at 6 sites of Galgok stream and Incheon river which run into Gomso Bay, Jeollanam-do in April, August and November 2007. Total of 210 taxa were found which were classified as 6 classes, 12 orders, 25 families, 66 genera, 177 species, 27 varieties, 5 forms and 1 unidentified species. These river and stream had lower concentration of T-N and T-P compared to that of others; however, the site 2 of Galgok stream in summer was hypertrophic in T-P and also near hypertrophic in TN, and the site 1 in Incheon river during fall appeared to be hypertrophic in T-N, and the site 3 in summer showed near hypertrophic level in T-P. Determining the trophic status of the water quality based on chlorophyll a (chl-a), the site 3 of Galgok stream in spring and the site 3 of Incheon river in fall were oligotrophic; moreover, 6 sites including the site 2 and 3 of Galgok stream in summer were mesotrophic, and 9 sites including all sites of Galgok stream in fall turned out to be eutrophic. Particularly, the site 1 of Galgok stream in summer was hypertrophic, having 58.19 mg chl-a m$^{-3}$. There was a conspicuous difference between two values of standing crops based on chl-a and cell counting. This discrepancy may have occurred because of abundant cyanophytes and exclusion of picoplankton cells in cell counting. In the study, 5 cyanophytes, Synechocystis aquatilis, Microcystis aeruginosa, M. flos-aquae, Oscillatoria angustissima, O. limnetica and 2 diatoms, Thalassiosira bramaputrae and Navicula viridula var. rostellata were abundant. Based on the T-N, T-P values, standing crops and cell counting in Galgok stream and Incheon river were between mesotrophic and eutrophic conditions.
Additions to the six taxa of the genus Cosmarium (Desmidiaceae, Charophyta) in Korea
이옥민 한국생태학회 2015 Journal of Ecology and Environment Vol.38 No.4
The samples were collected at lowland swamps, reservoirs, mountainous wetlands, and sphagnum bogs from 2012 to 2014. The followings were newly recorded in Korea: two species, three varieties, and one form, including six taxa of the genus Cosmarium. The newly recorded Korean species were Cosmarium bioculatum var. hians, C. bireme, C. pseudobiremum, C. nitidulum var. pseudorectangulare, C. trilobulatum f. retusum, and C. trilobulatum var. depressum. The flora of the genus Cosmarium contains 303 taxa in total in Korea. The specimens were cultured and deposited on the algal culture collection of Kyonggi University (ACKU) and National Institute of Botanical Resources (NIBR).