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Dynamics of Organic Matter and Inorganic Nutrients in a Over-enriched Mountain Stream due to Anthropogenic Loading  

Park, Jung-Im (Department of Biology, Pusan National University)
Kim, Young-Kyun (Department of Biology, Pusan National University)
Chung, Mi-Hee (Department of Biology, Pusan National University)
Song, Mi-Young (Department of Biology, Pusan National University)
Lee, Sang-Ho (Department of Civil Engineering, Pukyong National University)
Chon, Tae-Soo (Department of Biology, Pusan National University)
Lee, Kun-Seop (Department of Biology, Pusan National University)
Publication Information
Korean Journal of Environmental Biology / v.24, no.3, 2006 , pp. 230-239 More about this Journal
Abstract
Nutrient over-enrichment as a consequence of anthropogenic loading leads to eutrophication, which has the detrimental effects on river and stream ecosystems. To examine dynamics of factors causing cultural eutrophication in a over-licked mountain stream due to anthropogenic loading, physicochemical parameters were measured from 5 stations in the upper Daecheon stream, Busan, from January 2002 to May 2003. The five study sites were located along the stream gradient. DC1 is upper most clean site, and DC5 is located at the lowest area. Wastewater was released into the stream from just upstream of DC2 site. Water column ammonium and phosphate concentrations were higher during winter than other seasons, while water column nitrate +nitrite concentration did not show clear seasonal variation. Water column ammonium, nitrate+nitrite and phosphate concentrations were lowest at DC1 and highest at DC2 in which waste water loading occurred. TOC and DOC, conductivity, turbidity, and BOD in the water column were also increased drastically at DC2, and then decreased at DC5. Sediment pore water phosphate concentrations during winter and spring were higher than those in summer and fall, while sediment pore water ammonium and nitrate +nitrite concentrations showed no seasonal trend. Sediment pore water ammonium and phosphate concentration were also increased at DC2 and slightly decreased at DC5, while sediment pore water nitrate+nitrite concentration was highest at DC5. Organic matter and inorganic nutrients at up-stream of Daechon stream significantly increased as a result of wastewater discharge, and the nutrient concentrations decreased at low-stream suggesting self-purification ability of the stream.
Keywords
wastewater discharge; eutrophication; inorganic nutrient; TOC; DOC; mountain stream; water quality;
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