• 생태와환경
• /
• 제37권4호통권109호
• /
• pp.378-384
• /
• 2004

울릉도 수계의 부착규조군집의 계절적 변이와 DAIpo에 의한 수질평가를 조사하였다. 채집은 2003년 4월, 5월, 7월, 8월, 10월과 11월 그리고 2004년 1월과 2월에 4개의 정점에서 채집하였다. 총 95분류군이 동정되었으며 우점종들은 Nitzschia inconspicua, Achnanthes minutissima, Gomphonema angustum과 Cocconeis placentula var. lineata였다. DAIpo는 51.15에서 77.77의 범위였고 울릉도 수계의 수질은 ${\alpha}$-빈부수성에서 ${\beta}$-빈부수성이었다.

• 한국물환경학회지
• /
• 제30권6호
• /
• pp.596-604
• /
• 2014

This research has studied the physicochemical environmental factors and communities of epilithic diatom and phytoplanktons at Hongcheon river from December 2011 to September 2012. In case of TN, the result was hypertrophic, and for TP, it ranged from mesotrophic to eutrophic. As for BOD, Hongcheon river was rated level II or better, according to the water quality level; values were found to be below 3mg/L at most sites. Total of 83 and 114 taxa of epilithic diatom and phytoplanktons respectively, were found during the research. When assessed using the TSI, it ranged from oligomesotrophic to eutrophic. In case of DAIpo, it ranged from 64.1 to 99.5, and TDI ranged from 51.5 to74.0. These results signify good water quality, level B or better, for Hongcheon river. P-IBI was rated moderate to low, which showed higher pollution than other indices. Among the biological water quality measures analyzed in the Hongcheon river study, DAIpo best matches TDI and BOD, while TDI showed greater pollution. Therefore, P-IBI appears to be inappropriate when assessing the domestic small rivers and lakes.

• ALGAE
• /
• 제21권3호
• /
• pp.295-305
• /
• 2006

The purpose of the study is to understand the ecological characteristics of the early stage of community formation of epilithic diatoms. The samples were daily collected from a site of the Kumho River during 70 days from October 13 to December 21 in 2002. Total 126 diatom taxa collected in the study were classified into 114 species and 12 varieties belonging to 26 genera. About 80% of the taxa collected from the artificial substrata during the whole studying period were observed until tenth day from the start time of the study. In the study the successional process of the diatom community was divided into the three stages of the early, the middle and the later by cluster analysis based on the similarities in species composition among the communities. Cocconeis placentula Ehrenb. and C. placentula var. lineata (Ehrenb.) V.H., horizontally positioned species, would be divided into the early successional species, and Diatoma vulgre Bory, vertically positioned species, was the later successional species. Cell densities and species composition of the diatoms on the artificial substrata were closely similar to them of natural substrata after 40th day from the start time of the study.

• 한국환경생물학회:학술대회논문집
• /
• 한국환경생물학회 2004년도 학술대회
• /
• pp.49-49
• /
• 2004

• 한국환경보건학회지
• /
• 제36권2호
• /
• pp.148-154
• /
• 2010

In this study, a method for river water quality evaluation by algal examination was investigated. For development of this method, algae living in small rural streams in Gwangcheon-Cheon were collected and observed by microscope. Samples were collected at six stations from May 2008 to May 2009. To elucidate the relationship between pollution and the algal species, diatom grasps were collected from the streams and used to determine the water quality grade. The numerical EC value was compared with the value of DAIpo (Diatom Assemblage Index of Organic Water Pollution), and the results showed a tendency to a mutually inverse relationship. Further, the numerical BOD and COD values were compared to the DAIpo value. The results showed that, various diatoms reside in Gwangcheon-Cheon, and water quality was found to be second-grade at all the examined points. These results indicate pollution of streams by livestock wastewater; however continuous monitoring will be necessary to more definitely determine the reason for the Gwangcheon-Cheon pollution.

• 한국물환경학회지
• /
• 제25권4호
• /
• pp.606-614
• /
• 2009

To evaluate the biological water quality, diatom-based biological indices (DAIpo and TDI) were examined in the Sum-River and the Dal-stream. Having BOD concentrations below $2mg{\cdot}L^{-1}$ in most sites, water quality of both rivers was good. The DAIpo and TDI values ranged from 29.8 to 91.4 and from 38.7 to 93.0 respectively. From the biological water quality assessment, DAIpo and TDI for both rivers displayed fair to fairly poor water quality levels. However, the two indices showed more polluted conditions than expected from the BOD vlaues. In addition, DAIpo, having wider range of differences, appears to be more sensitive to the change in water quality when compared to TDI values. Statistical analysis using principal component analysis showed that Nitzschia palea and Diatoma vulgare might not be the appropriate indicators due to their low correlations with other indicators.

• 생태와환경
• /
• 제50권4호
• /
• pp.470-477
• /
• 2017

본 연구는 낙동강 상류에 위치한 내성천과 지류들을 대상으로 총 15개의 지점에서 2016년 5월, 8월 및 10월의 총 3회에 걸쳐 이화학적 환경요인들과 부착돌말 군집의 특성을 분석하고, 생물학적 방법인 DAIpo와 TDI를 이용하여 수질을 평가하였다. 내성천 수계에서 출현한 부착돌말류는 2목 3아목 9과 35속 145종 16변종 2품종으로 구성된 총 163종이 출현하였다. Cocconeis placentula var. lineata는 모든 지점에서 출현하였으며, Achnanthes lanceolata, Nitzschia fonticola, Nitzschia inconspicua와 Reimeria sinuate는 내성천의 보편적인 분류군들로 조사되었다. Nitzschia inconspicua와 Achnanthes minutissima가 주요 우점종으로 출현하였다. CCA 분석 결과, 부착돌말 종조성은 전기전도도와 총질소에 가장 많이 영향을 받는 것으로 나타났다. DAIpo를 이용한 생물학적 수질평가 결과, 내성천의 DAIpo는 평균 62.38로 B등급이나, TDI로 평가한 결과, 내성천의 TDI는 평균 66.12로 C등급으로 나타났다.

• 생태와환경
• /
• 제51권1호
• /
• pp.1-15
• /
• 2018

With land-use (cover) and water quality, the distributional characteristics of epilithic diatom communities were studied with 193 samples from estuaries of Korean peninsula between 2015 and 2016. Of total 394 taxa classified, Nitzschia perminuta (19.6%) and N. inconspicua (14.0%) were the 1st and 2nd dominant species. Using a cluster analysis, the epilithic diatom communities of Korean estuaries were divided into four groups (G1-G4). Ecological characteristics of each group were followed: G1 was located in estuaries of the East Sea, and characterized by high forest land-use and high DO and low nutrients; G2 was the eastern part of the South Sea, and characterized by low turbidity and nutrients; G3 was the western part of the South Sea, and characterized by high agriculture, low electric conductivity and low salinity; G4 was the Yellow Sea, and characterized by high nutrients. The environmental factors having significant correlation with diatom distributions were as follows: TN to G1, turbidity to G2, agriculture to G3, and TP to G4. Moreover, the important factors affecting the occurrence of indicator species were forest land-use for Fragilaria construens var. venter in G1, turbidity for Rhoicosphenia abbreviata in G2, urban land- use and total phosphorus (TP) for Bacillaria paradoxa and Hantzschia amphioxys of G3, and TP and turbidity for N. ovalis and Stephanodiscus invistatus of G4. These results collectively indicate that the distribution of epilithic diatom communities in Korean peninsula was largely effected by water quality and land cover/use.

• 생태와환경
• /
• 제48권2호
• /
• pp.115-121
• /
• 2015

부착규조 군집의 유기오탁지수 (DAIpo)에 의해 금호강의 수질을 평가하고 이전 수질과 비교하기 위하여 금호강에 5개의 정점을 선정하고, 2010년 4월부터 2012년 9월까지 매년 4월과 9월 총 6회에 걸쳐 채집조사를 실시하였다. 116종이 출현하였으며 2목, 3아목, 7과, 26속, 103종, 13변종으로 분류되었다. Achnanthes minutissima 등 10종이 우점하였고 하류로 갈수록 호오탁성종이 늘어났다. 부착규조 군집과 이화학적 요인과의 상관관계 (r)는 -0.62~0.71의 범위로 상관성의 범위가 넓었다. 두 규조지수 (DAIpo, TDI)가 총질소와 높은 상관성 (r=0.57, r=0.67)을 나타내어 총질소가 부착규조 군집에 영향을 미치는 것으로 나타났다. 상관분석 결과, DAIpo와 TDI는 상관계수 0.62로 나타났다. 평균DAIpo는 37.24~74.98이었고 상류에서 하류로 갈수록 수치가 낮아졌다. 금호강의 정점별 평균수질은 정점 1은 ${\beta}$-빈부수성수역, 정점 2는 ${\alpha}$-빈부수성수역, 정점 3는 ${\beta}$-중부수성수역으로 이전의 수질과 변화가 거의 없었다. 그러나 정점 4와 5는 ${\alpha}$-중부수성수역과 강부수성수역으로 수질오염이 심하였으나, 이번 조사에서 ${\beta}$-중부수성수역으로 나타나 하류의 수질이 상당히 개선된 것으로 나타났다. DAIpo를 이용한 종합적 수질평가인 RPId는 52.27로 금호강은 중간 정도의 수질로 평가되었다.

• 생태와환경
• /
• 제37권1호통권106호
• /
• pp.70-77
• /
• 2004

본 연구는 낙동강 중류 지역에 9개의 정점을 선정하여, 2002년 5월부터 2003년 1월까지 2개월마다 각각 1회씩 채집 ${\cdot}$ 조사하였다. 동정된 부착조류는 모두 102분류군으로 33속 139종 23변종으로 구성되었고, Achnanthes minutissima, Navicula subminuscula, Navicula viridula var. rostellata, Nitzschia inconspicua 및 Nitzschia palea등 5분류군이 조사 기간 내내 출현하였다. 본 조사정점의 DAlpo의 월 평균값의 범위는 30.90${\sim}$44.61로 ${\beta}$-중부수성이었다.