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수영천과 석대천의 깔따구류 군집 분석 및 생물학적 수질평가
윤병진,전태수 ( Byeong Jin Youn,Tae Soo Chon ) 한국하천호수학회 1996 생태와 환경 Vol.29 No.4
Spatial and temporal patterns of chironomids, monthly collected with the Surber net in the Suyong and Soktae streams of the Suyong River, were analyzed from March, 1992 to July, 1994. The species richness in chironomids was highest among benthic macroinverte-brates. The number of chironomid species collected in the Suyong river were 47 in 33 genera and 5 subfamiles. The dominant species at the slightly polluted zone (β-mesosaprobity) were Orthocladius sp.1 and Conchapelopia sp.1, while Chironomus flaviplumus was most abundant at the polluted stations (polysaprobity) in the Soktae stream. The patterns of species compositions in chironmids reflected the overall impact of organic pollutions. Diversity indices of chironomid community were sharply decreased at the polluted sites in the Soktae stream. Abundances in chironomid species at the study sites were generally divided into the four groups in different levels of organic pollutions. Species richness in chironomids was highest (39∼40) at the sites of YCK and YIG ranging from oligosaprobity to β-mesosaprobity. The least number of species (11) was collected at the highly polluted site (polysaprobity), TCL. The biological assessment based on chironomid community may be effectively used for ecologically differentiating of some highly polluted sites.
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Youn, Byeong-Jin,Chon, Tae-Soo 부산대학교 유전공학연구소 1999 분자생물학 연구보 Vol.15 No.-
1992년 3월부터 1994년 10월에 걸쳐 수영강의 지류이며 대표적인 도시오염하천인 석대천의 깔따구류 군집의 시, 공간적 변화를 월별로 조사하였다. 조사 기간동안 총 44종의 깔따구류 유충이 채집되었으며 비교적 수질이 깨끗한 지점의 우점종은 깃깔까구아과의 그네깃깔따구와 늪깔따구아과의 Conchapelopia melanops였으며 오염이 심한 지점에서의 우점종은 깔따구아과의 노랑털깔따구로 나타났다. 오염의 정도는 깔따구류 군집 변화에 영향을 주는 것으로 나타났는데 오염이 증가할수록 종 풍부도와 종 다양도가 감소하였으며 우점도는 증가하였다. 특히 깔따구류의 밀도는 강우의 영향을 많이 받는 것으로 나타났다. 깔따구류의 아과구성, 종 풍부도 및 노랑깔따구의 상대밀도는 수질을 평가할 수 있는 척도가 될 수 있으며 특히 노랑털깔따구의 출현은 오염도와 높은 상관관계를 나타내고 있어서 오염에 대한 지표종으로 사용될 수 있는 가능성을 시사하였다. Temporal and spatial variations in chironomid communities in the Soktae stream, a tributary of the Suyong river, were investigated through monthly collections from March 1992 to October 1994. The stream was gradually polluted with agricultural effluents and domestic sewage as it flowed down. In total forty four species of chironomid larvae were collected during the study period. The impact of pollution appeared higher in chironomid communities as the degree of pollution was increased: the species richness and diversity indices were decreased while dominance indices were increased. Seasonal trends in species richness and diversity were observed at the relatively clean sites. Rain fall affected more strongly in densities in chironmid community during the study period. Relative abundance of Chironomus flaviplumus, the dominant species at highly polluted sites, could be a useful key in detecting severe level of organic pollution in urban streams.
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