낙동강 하구의 환경요인과 미생물의 상호관계에 관한 연구 = The Relationship between Environmental Factors and Microorganisms in Naktong River Estuary

다국어 초록 (Multilingual Abstract)

The influences of estuary barrage on the changes of physiocochemical environmental factors and distribution of microorganisms were investigated 23 times from Sep. 1997 to Aug. 1998 at three sites of Naktong river estuary.
Inorganic nutrients were higher in Site I (freshwater, upper side of estuary barrage) rather than in Site Ⅱ and Ⅲ(seawater, under side of estuary barrage). The spatial distribution of three inorganic nitrogen compounds at Site Ⅰwas high because of domestic sewage and agricultural water, and the seasonal distribution was high in winter. This may be due to the expended residence time of water in estuary by the construction of the barrage.
The distribution of microorganism was also higher in Site I than in other sites spatially.
There were significant correlations between environmental factors and distribution of bacteria according to multiple correlation analysis. Especially, bacteria were positively correlated with concentration of inorganic nutrients and precipitation.
Factor analysis with 16 parameters led to extraction of 4 factors that accounted for 58% of the ecosystem variation of Naktong River Estuary.
The factors were identified in the following order ; 1) the effect of Naktong river estuary barrage, 2) phytoplankton, 3) characteristics of season, especially summertime, 4 input of soil and fecal contamination.

목차 (Table of Contents)

• Ⅰ. 緖論
• Ⅱ. 材料 및 方法
• Ⅲ. 結果 및 考察
• Ⅳ. 結論
• 參考文獻
• Summary