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팔당호의 생태학적 연구 - 1. 수질의연변화 : 과거와 현재 -
한명수,유재근,유광일,공동수 ( Myung Soo Han,Jee keun Ryu,Kwang Il Yoo,Dong Soo Kong ) 한국하천호수학회 1993 생태와 환경 Vol.26 No.2
Annual variation of water quality in Pal`tang Reservoir in Korea is described. Water samples were collected monthly from surface layer at the one station of Pal`tang reservoir, Korea from March 1988 to May 1992. Dissolved oxygen, turbidity, conductivity, pH and chlorophyll-α concentration in water column was high compared with that of 1970`s. Recently, the frequency and intensity of phytoplankton blooms(over 15㎍ chlorophyll-α1^-1) appear to be increasing. Total nitogen concentration was high compared with that of 1970`s. But, it decreased gradually from 4.76mg/l to 0.51mg/l on January 1991 as it goes. Total phosphorus concentration in water column has increased more and more from 0.004mg/l to 0.074mg/l since 1988. Therefore, N/P ratio by atoms reduced from 500 to 10∼20 because of the increasing of phosphorus and decreasing of nitrogen. This result suggests that phosphorus limited phytoplankton growth in Pal`tang Reservoir. However, if N/P ratio reduced continuously like this pattern, dominat phytoplankton species might change due to nitrogen limitation from diatom assemblages to blue green algae.
문은영 ( Eun Young Moon ),김영옥 ( Young Ok Kim ),김백호 ( Baik Ho Kim ),공동수 ( Dong Soo Kong ),한명수 ( Myung Soo Han ) 한국하천호수학회 2004 생태와 환경 Vol.37 No.2
In order to understand the taxonomic and ecologic characteristics on ciliates plank-ton, surface water samples were collected once a weekly from March 2001 to December 2001 except once a monthly from December 2001 to January 2001 and twice a monthly at February 2001 at Pal`tang reservoir in Korea. Totally 12 species belonging to 10 genera in 7 families of 6 order, were identified and all species new record in Korea. All of them had been recorded in eutrophic water bodies. Succession of dominant species occurred obviously according to seasonality. Large-sized Codonella cratera, Rimostrombidium lacustris, Strobilidium caudatum, Limnostrombidium viride, Pelagostrombidium fallax, Stylonychia sp., Pseudostrombidium planktonticum and Phascolodon vorticella dominated during the period of outbreak of nanophytoplankton in winter to spring. However, small-sized Rimostrombidium hyalinum, Rimostrombidium brachykinetum, Halteria grandinella and Vorticella convallaria occurred when the bacteria abundance increased in summer to autumn.