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한강 (漢江) 중·하류 지천생태계의 (支川生態系) 저서성 (底棲性) 무척추동물군집 (無脊椎動物群集) 및 환경요인과의 관계
배경석,박성배 ( Kyung Seok Bae,Sung Bae Park ) 한국하천호수학회 1992 생태와 환경 Vol.25 No.1
We performed this research for the analysis of benethic invertebrate community and the biological estimation of water pollution levels in the tributary streams of Han river on October, 1989 to March, 1990. The total number of taxa collected in this area composed of 97 species, 53 genera, 36 families, 14 orders, 6 classes in 3 phyla. The occurrance species number at each site appeared as 1∼30 species range. Species number is a few at middle and lower region of Anyangchoˇn, Jungryangchoˇn, Tanchoˇn and Wangsukchoˇn and central dominant species is Chironomus sp. in Diptera at above regions. Ephemeroptera and Trichoptera occured more abundantly at Kyunganchoˇn, Gonjiamchoˇn and Chojongchoˇn than urban streams. According to the saprobic system based on species diversity indices of benthic invertebrates, Anyangchoˇn, Jungryangchoˇn and Tanchoˇn are determined as polysaprobic and α-sprobic area except at upper site of Anyangchoˇn in oligosaprobic area. Also, Chojongchoˇn and Kyunganchoˇn except at Yongin town site are determined as β-saprobic and limnosaprobic area. Between species diversity index and trent biotic index are appeared as closely positive correlation (r= 0.9075), and they are fluctuated with a similar rate according to the water pollution level. Between species diversity index and dissolved oxygen are appeared as closely positive correlation (r = 0.7459), but appeared as negative correlation in relation to BOD (r= -0.5339), NH_3-N (r= -0.5412), PO_4-P (r= -0.5573), ABS (r= -0.3215) and Conductivity (r= -0.6499).
한강하류 (漢江下流) 일부 지천생태계의 (支川生態系) 저서성 (底棲性) 대형무척추동물 (大型無脊椎動物) 동태 특성 - 분포 및 풍부도의 (豊富度) 변동을 중심으로 -
배경석,최영복,박성배 ( Kyung Seok Bae,Young Bok Choi,Sung Bae Park ) 한국하천호수학회 1993 생태와 환경 Vol.26 No.1
The present study was carried out to examine the spatial distribution and abundance variations of benthic macroinvertebrates at Chojong, Kyungan, and Jungrang streams in lower Han river in October 1990 through August 1992. The benthic macroinvertebrates composed of 74 species, 32 families, 10 orders, 4 classes in 3 phyla in the specimens of Chojong stream; 45 species, 22 families, 11 orders, 5 classes in 3 phyla in the specimens of Kyungan stream and 40 species, 23 families, 13 orders, 5 classes in 3 phyla in the specimens of Jungrang stream, respectively. These ranges generally showed big fluctuatuions between upper and lower regions of Kyungan and Jungrang streams, but showed small fluctuations between upper and lower regions of Chojong stream. Abundance of benthic macroinvertebrates at each stream were Ephemeroptera 49.3%, Trichoptera 40.3% and Plecoptera 3.7% at Chojong stream; Ephemeroptera 47.8%, Dipteria 30.4% and Trichoptera 16.1% at Kyungan stream and Annelida 84.1% and Diptera 13.0% at Jungrang stream. Ephemeroptera and Trichoptera were abundant at Chojong stream; but, Annelida and Diptera were abundant at Jungrang stream. Major dominant species were Drunella aculea, Epeorus curvatulus and Hydropsyche KUe at Chojong stream, but those were Chironomus sp. at middle region of Kyungan stream, and Limnodrulus sp. and Chironomus sp. at middle and lower region of Jungrang stream. Dendrograms based on Sørensen`s similarity coefficients among the each site of three tributaries were made to compare their similarites. Similarities of all the sites at Chojong stream did not make any big difference; but, claen and unpolluted sites (K1, K9, K10) of Kyungan stream were clustered as a group as compared with the polluted sites (K3∼K8). The sites of Jungrang stream were generally divided into two clusters; clean (J1) and severely polluted with municipal sewages (J2∼J8).