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자료유형
학술저널
저자정보
저널정보
한국환경생물학회 환경생물 환경생물 제27권 제3호
발행연도
2009.1
수록면
306 - 313 (8page)

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In the Upo wetland, physico-chemical factors were observed during the period from March 2005 to December 2007 on a monthly basis. In the Upo wetland, water temperatures ranged 3.4~34.5℃. Conductivities were in the range of 133~806 μS cm-1, which showed about 140 μS cm-1 below in comparison with the precedent studies. The pH levels were between 6.7~9.1 with lower level in summertime. The dissolved oxygens were between 0.06~18.23 mg L-1. COD ranged 4.9~20.8 mg L-1, and showed a tendency to decrease every year. Nitrogen nutrients such as nitrate nitrogen (NO3-N), ammonia nitrogen (NH3-N) and total nitrogen (T-P) showed that they were generally decreased in comparison with those in the precedent studies. However the total nitrogen (T-N) is still considerably higher than the standard concentration level of eutrophication and algal blooming. Phosphate phosphorus (PO4-P) and total phosphorus (T-P) were also shown as to be reduced considerably comparing with the values in the precedent studies. However, It was found out that total phosphorus (T-P) was dissolved over the criteria concentration of eutrophication. The average of TN/TP ratio was 18 in the Upo wetland, which proved that phosphorus was the limiting factor to the growth of phytoplankton in the Upo wetland. The chl-a was the highest in wintertime and the lowest in summertime, and especially in 2006 summer when the cyanobacterial bloom developed, it showed extremely high concentration.

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