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보성강 (寶城江) 및 이사천 (伊沙川) 수계의 (水系) 수서곤충 (水棲昆蟲) 군집에 (群集) 관한 연구
나철호,백순기,조영관,황수옥 ( Chul Ho Ra,Soon Ki Baik,Young Gwan Cho,Su Ok Hwang ) 한국하천호수학회 1989 생태와 환경 Vol.22 No.2
The aquatic insect fauna and their community structure in the Poso^˘ ng River System and Isa stream in Chonnam, Korea was studied from August 1987 to April 1988. The total number of taxa was 99 species, 54 genera, 22 families in 8 orders in the Poso^˘ ong River System and 62 species, 39 genera, 21 families in 8 orders in the Isa stream. The major groups were Ephemeroptera and Trichoptera in two catchment. The fauna was dominated numerically by Ephemeroptera (47%) in the Posoo^˘ ng River System and by Trichoptera (61%) in the Isa stream. Ephemeroptera, Trichoptera and Diptera were relatively more abundent during the spring season. Mostly Dominant species belonged to Ephemeroptera and Trichoptera in the Posoo^˘ ng River System and in the Isa stream was Hydropsyche orientalis. Dominant indices ranged from 0.19 to 0.95 in the surveyed stream. Species diversity indices showed 1.97-3.45 in studied stream.
지리산 (智異山) 뱀사골 강도래목 유충의 계절 및 고도에 따른 분포
나철호,조영관,김종선 ( Chul Ho Ra,Young Gwan Cho,Jong Sun Kim ) 한국하천호수학회 1991 생태와 환경 Vol.24 No.2
The seasonal and altitudinal distribution of the Plecoptera nymphs in Paemsagol valley were studied from October 1986 to August 1987. Total number of species identified was 19 species representing 17 genera in 9 families. The seasonal variation was showed 12 species on spring and winter, 10 species on autumn and 5 species on summer, respectively. Scopura laminata occurred in over the elevation of 700 m. Taenionema KUb and T. KUc are only occurred in the elevation of 1,000 m. According to the increasing altitude, the number of individuals of Taenionema KUa, Yoraperla KUa and Megarcys ochracea were increased, but Oyamia coreana and Pteronarcys saccharina were decreased. Predominantly occurring species in the number of individuals were Yoraperla KUa, Taenionema KUa, Sweltsa nikkoensis, and in biomass were Paragnetina flavotincta, Kamimuria KUa, Megarcys ochracea and Paragnetina flavotincta.
광양천의(光陽川) 수서곤충에 (水棲昆蟲) 대한 생태학적 연구
나철호,조영관 ( Chul Ho Ra,Young Gwan Cho ) 한국하천호수학회 1986 생태와 환경 Vol.19 No.1·2
This ecological studies carried out to survey the insect fauna, community structure, standing crop and environmental factors of the aquiatic insects in the Kwang`yang stream, from January to September, 1985. The aquiatic insect fauna in the Kwang`yang stream is composed of total 154 species, 78 genera, 41 families, 10 orders. The indigenous species in the Kwang`yang stream are Isotomutus schaefferi, Archisotoma sp., Dipteromimus tipulifomis, Strophopteryx faciata, Arctopsyche maculata, A. sp. A, A. sp. B, A. sp. D, Luciola cruciata, Culiodes sp. KA. The percentage of standing crop according to the insect orders are as follows; Ephemeroptera 39.9%, Odonata 2.9%, Plecoptera 8.7%, Megaloptera 12.2%, Trichoptera 28.5%, Coleoptera 2.0%, Diptera 5.5%, Others 0. 3%. In the monthly variation of standing crop, the highest on February (62.8g) and the lowest on August (4.6g). Seasonal variation of standing crop is showed high in winter and spring (24.8∼62.8g), but low in summer and autumn (4.6∼16.1g). According to the surveyed sites, standing crop showed to tendency high at upper (27. 8∼64. lg) and low at lower stream (2.3∼5. 2g), respectively. Epeorus latifolium was a dominant species in the surveyed area. Dominance indices of the upper stream showed low value of 0. 244∼0. 319 and that of the lower stream showed high value of 0.459∼0.839. Species diversity indices represented 4.160 in the Kwang`yang stream, among them, 2. 925∼4. 120 at upper stream, 2. 695∼3.123 at mid stream and 1.023∼1.703 at lower stream. By similarity value, the Kwang`yang stream is divided the three distinctive regions, upper, mid and lower stream, respectively.
한국산 (韓國産) 수서곤충의 (水棲昆蟲) 환경오염물질에 대한 내성 (耐性) 및 감수성 연구
나철호,최충길,백순기 ( Chul Ho Ra,Chug Gil Choi,Soon Ki Paik ) 한국하천호수학회 1986 생태와 환경 Vol.19 No.1·2
The aquatic insects of mayflies (Ephemeroptera) and stoneflies (Plecoptera) which inhabited in Yo^˘ngsan and Tamjin rivers were identified, and sensitivity, tolerance range, and pollution tolerance index associated with identified each species on the environmental pollutants were investigated. Also in order to use as indicator organisms, nine species were selected and the optimal BOD_5 value and relative frequency of occurance were computed and examined. Thirty species of mayflies and twentytwo species of stoneflies were identified. Potamanthus sp. NB and Ecdyonurus yoshidae tolerated in low pH level of 5. 5. E. yoshidae, Ephemerella rufa and Cloeon dipterum tolerated in waters with high nutrient concentration. P, sp. NB, E. rufa and C. dipterum also tolerated in organically polluted and low dissolved oxygen concentration waters. Tolerant species to high water temperature of above 30℃ was E. rufa and stoneflies, Alloperla granulata and Phasaganophora capitata occured at low water temperature in 5℃ to 15℃ limitted. Tolerant species to the turbidity of above 20 NTU were Baetis sp. KA and Tadamus sp. The pollution tolerance indices of mayflies and stoneflies were range from 0.5 to 5 and 0 to 2, respectively. P. sp. NB and E. rufa showed the highest optimal BOD_5 value of 10.5㎎/ℓ, at that concentration, their relative frequencies of occurance were 29.6% and 57.2%, respectively. Three species of stoneflies were range from 1.4 to 1.5 ㎎/ℓ and 40.1 to 46.5%.