• Journal of Ecology and Environment
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• 제37권4호
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• pp.327-339
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• 2014

This research includes the identification and cultivation of aerial algae from 33 sites located in Mt. Gwanggyo of Gyeonggi-do, Korea, from March 2011 to August 2012. The ecological factors of aerial algae were analyzed and a total of 29 taxa were identified in 4 phyla, 5 classes, 11 orders, 15 families, 19 genera, 28 species and 1 variety; 12 taxa of cyanophytes, 8 taxa of chrysophytes, and 9 taxa of chlorophytes were found. As for newly recorded cyanophytes of Korea, Komvophoron jovis, Microcoleus steenstrupii, and Nostoc edaphicum appeared. Komvophoron jovis, previously known to grow on rocks and boulders, appeared in soil. Microcoleus steenstrupii, reported to appear in desert soils, appeared on the wet surface of the soil after rain. Nostoc edaphicum, in symbiosis with fungi, appeared on tree bark as the lichen. Thus, there are a total of 99 reported taxa of Korean aerial algae, including 3 species that were discovered in this study.

• ALGAE
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• 제27권4호
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• pp.283-294
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• 2012

The physico-chemical and environmental factors of stoneworks were examined from March 2009 to October 2010, and aerial algae living on 24 stoneworks in Korea were identified. Fifty aerial algae were found in 24 stoneworks. Of the 50 taxa, 30 taxa were cyanophytes, 16 taxa were bacillariophytes, 3 taxa were chlorophytes, and 1 taxon was a xanthophyte. Nine species, including Aphanocapsa rivularis, which is known to only live in aquatic conditions, inhabited both aquatic and aerial environments. Synechococcus aeruginosus, Scytonema coactile var. thermalis, S. coactile var. minor, Stigonema ocellatum f. ocellatum, and Oscillatoria boryana were newly recorded in Korea. As a result of a correlation analysis between algae and the physico-chemical and ecological environmental factors, the taxa were divided into the bryophyte group, the humidity group, and the dry group. Although the bryophyte group was included within the humidity group, it was separated from the dry group. Taxa in the bryophyte group including Nostoc commune which was distributed in more humid areas than those in the humidity group. However, dry group taxa including Chroococcus pallidus were distributed in lower humidity than that of the two other groups. Correlations among other environmental factors were tested to identify other factors that could substitute for humidity and light intensity. As a result, tree distance, water distance, and plant coverage were replaceable environmental factors.

• 한국산학기술학회논문지
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• 제16권1호
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• pp.895-899
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• 2015

새만금수역 내부의 방수제 착공시점(2011년)으로부터 2013년까지 새만금 수역을 담수역, 하구역, 만경호와 동진호 수역, 방조제 밖 외해역 등 4개의 수역으로 나누어 연 4회씩 식물플랑크톤 군집을 조사하였다. 2011년 조사(3월, 6월, 9월, 11월)에서는 각 시기별로 48-59종씩의 식물플랑크톤이 출현하였으며 만경호 및 동진호 수역에서 6월의 결과는 담수종이 우세하였으나 9월에는 담수종과 해수종의 공존이 관찰되었다. 2012년 조사(4월, 6월, 9월, 11월)에서는 각 시기별로 45-65종이 출현하였고 9월에 가장 다양하였는데 그 원인은 담수정점들을 중심으로 남조류의 출현종수가 증가한 것에 기인한 결과였다. 2013년 조사(3월, 6월, 9월, 11월)는 56-69종이 출현하여 연구수역은 최근으로 오면서 오히려 출현종수는 증가하고 있었다. 특히 6월의 결과에서 최대 출현종수를 보였는데 해수영향을 받는 곳에서는 와편모조류 출현종의 증가, 그리고 담수역에서는 남조류와 녹조류 출현종의 증가에 의한 결과였다.

• ALGAE
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• 제23권4호
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• pp.257-268
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• 2008

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.

• ALGAE
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• 제23권1호
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• pp.63-69
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• 2008

The purpose of research was to find aerial algae and to investigate the change of color in each class of photosynthetic pigments in five stone cultural properties of Korea. It turned out to be a total of 29 taxa, including as 26 species, 1 variety and 2 unidentified species. Among them, Haplaosiphon fontinalis and Stigonema turfaceum were found to be newly recorded species of Korea. The average Chl-a concentration from the change of color in the stone cultural properties increased as its class; however, the class 5 showed lower values than the class 4, which was shown in previous studies. From the studies of algal distribution, chlorophytes appeared earlier than cyanophytes in stone cultural properties of algal infestation. Also, 50% or more of the five stone cultural properties already appeared to have bio-pollution.

• ALGAE
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• 제23권4호
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• pp.269-276
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• 2008

We have conducted the study of distribution and inhabitation of the aerial algae from five stone cultural properties located in Gyeonggi-do. A total of 21 taxa were identified, among which 8 taxa of cyanophytes, 12 taxa of cholorophytes and one diatom species. Protococcus viridis, Ulothrix zonata, Synechocystis aquatilis and Chroococcus varius occurred in 15, 9, 8 and 7 study sites, respectively. These coccoid types appeared more frequently than filamentous types. In this study, Chlorococcum infusionum, Cylindrocystis gracilis, Klebsormidium crenulatum, Klebsormidium dissectum and Klebsormidium flaccidium newly recorded from Korea. We found that 80% of stone cultural properties had aerial algae and their 58-84% were grouped into Class 5 based on chlorophyll-a concentration.

• 생태와환경
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• 제36권2호통권103호
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• pp.150-160
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• 2003

광 차단에 의한 식물플랑크톤 발생량의 저감효과와 수질변화를 분석하기 위하여 주암호의 복교 지점에서 2000년 8월부터 11월까지 수질, Chl-3 농도, 그리고 식물플랑크톤 종조성과 현존량을 측정하였다. 수온, 투명도, DO, TN, $NO_3-N$, $NH_4-N$, TP DIP COD,55, pH 등의 수질항목의 농도는 차광장치 내부지역과 외부지역에서 약간의 차이가 나타났으나 그 차이는 크지 않아 차광장치에 따른 정체로 인한 수질의 변화는 거의 없는 것으로 판단된다. Chl-a의 농도는 차광장치의 내부에서 더 낮게 나타났는데, 차광지역에서의 Chl-a의 농도감소효율은 -6.6${\sim}$40%(평균 14.7%)였다. 차광에 의한 Chl-a의 저감효율은 Chl-a의 농도가 높을 때 더 효과적인 것으로 나타났다. 본 조사기간에 동정된 식물플랑크톤은 1문 5강 11목 21과의 55종이었다. 주요 우점종은 Microcystis aeruginosa, Aulacoseira granulata, Peridinium sp., Synedra spp., Oscillatoria sp., Fragilaria construens, Trachelomonas sp.였으며, 우점종의 변화는 7월의 규조류 우점 ${\to}$ 8${\sim}$9월에 규조류-남조류 혼재기 ${\to}$ 10월의 남조류 우점 ${\to}$ 10${\sim}$11월의 규조류 우점으로 나타났다. 식물플랑크톤의 현존량은 9월 22일 차광시설 외부지역에서 최고($1.1{\times}10^4$cells/L)를, 10월 25일 내부($4.7{\times}10^3$ cells/L)에서 최저를 나타냈다. 차광시설에 의한 식물플랑크톤 현존량 저감율은 8${\sim}$38% (평균 19.9%)로 나타났다. 이상의 결과에서 차광은 식물플랑크톤의 현존량저감에 어느 정도 효과가 있음을 알 수 있었다.

• 한국산학기술학회논문지
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• 제11권9호
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• pp.3610-3614
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• 2010

새만금 수역에서 2006년 5월부터 2007년 11월까지 8회의 조사를 통해 표영환경의 미소조류군집의 분류군 조성과 다양성지수 등을 연구하였다. 조사수역 미소조류군집의 출현종은 총 191종으로 규조류(Diatom) 94종, 녹조류(Chlorophyte) 31종, 와편모조류(Dinoflagellate) 24종, 남조류(Cyanophyte) 24종, 유글레나조류(Euglenophyte) 11종, 규질 편모류(Silicoflagellate) 3종, 크립토조류(Cryptophyte) 1종, 기타 미동정 미소편모조류 3종 등으로 구성되었다. 연구기간 동안 연구수역 미소조류군집의 다양성 지수는 시공간적으로 변화가 지속되어 일정한 변화의 규칙성을 찾기 어렵다. 이는 공사의 진행과 방조제 수문개폐에 따른 수질환경의 급변 등 인위적 요인이 부유성 미소조류에 스트레스로 작용한 것으로 보인다.

• 생태와환경
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• 제44권2호
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• pp.113-128
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• 2011

본 연구는 2007년 10월부터 2008년 7월까지 대청호의 중요 유입지천인 소옥천에 대해 이화학적 수질, 식물플랑크톤 군집을 분석하고 수질영양단계를 평가하였다. 식물플랑크톤은 Microcystis aeruginosa와 Aulacoseira granulata 등 수화원인종의 출현빈도가 높아 잠재적으로 남조류 및 규조류에 의한 녹조현상이 연중 지속될 수 있을 것으로 판단된다. 또한 Oscillatoria limasa를 포함한 10분류군의 오염수역 지표종이 출현하였다. TSI (Trophic Status Index)와 LTSI (Lake Trophic Status Index)에 의한 수질영양단계 평가 결과, TSI는 중부영양~부영양화단계, LTSI는 중부영양단계~과영양단계로 평가되었다.

• 환경생물
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• 제39권1호
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• pp.32-38
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• 2021

Cyanobium is a genus of picoprokaryotic cyanophytes, which includes species worldwide. The present study investigated the morphology, ultrastructure, and molecular phylogeny of the unrecorded genus Cyanobium Rippka & Cohen-Bazire 1983 and species Cyanobium gracile Rippka & Cohen-Bazire 1983. A C. gracile culture from a freshwater sample collected from the Adongji pond was established by single-cell isolation. Morphological data were analyzed using light and transmission electron microscopy. C. gracile lives as solitary cells without gelatinous envelopes and is ovate, oval, or shortly rod-shaped. Thylakoids are laid along the cell walls, with three thylakoid membranes parallel to each other. Nucleoplasm was observed in the center of the cell. Molecular phylogeny performed with data from 16S small subunit ribosomal DNA gene (SSU rDNA) sequences showed that the three strains of C. gracile, including the type strain (PCC6307) and a newly recorded strain (Adong101619), formed a distinct clade with a high supporting value (maximum-likelihood=100, pp=1.00). Based on morphology and molecular data, we report the newly recorded C. gracile in Korea.