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굴양식어장 밀집해역인 진해만과 거제-한산만의 퇴적물 내 유기물 분포특성

Organic Enrichment and Pollution in Surface Sediments from Jinhae and Geoje-Hansan Bays with Dense Oyster Farms

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주제분류수산학

초록

Organic enrichment and pollution was investigated in surface sediments from Jinhae Bay and Geoje-Hansan Bayof Korea, which contain the largest oyster farms in Korean coastal areas. Geochemical indicators (chemical oxygendemand, total organic carbon, ignition loss, and acid volatile sulfide) in sediments, ammonium and nitrate in porewater, and bioluminescence inhibition test for sediment extracts were analyzed. Temporal changes of organic enrichmentwere also investigated using sediment core samples from Geoje-Hansan Bay. The level of organic pollution insediments from Jinhae Bay was significantly greater than that of sediments from Geoje-Hansan Bay. Compared withother sites, Jinhae Bay was one of the most polluted coastal areas of Korea. The levels of geochemical indicators inMay were comparable to, or higher than, in August. Ammonium concentrations in pore water were two orders ofmagnitudes greater than the nitrate concentrations, suggesting that the bays are reducing environments. The concentrationsof total organic carbon in core sediment samples from shellfish-farming areas increased significantly from2000 to the present year, and it seems to be associated with increases in anthropogenic activities.

Abstract

Organic enrichment and pollution was investigated in surface sediments from Jinhae Bay and Geoje-Hansan Bayof Korea, which contain the largest oyster farms in Korean coastal areas. Geochemical indicators (chemical oxygendemand, total organic carbon, ignition loss, and acid volatile sulfide) in sediments, ammonium and nitrate in porewater, and bioluminescence inhibition test for sediment extracts were analyzed. Temporal changes of organic enrichmentwere also investigated using sediment core samples from Geoje-Hansan Bay. The level of organic pollution insediments from Jinhae Bay was significantly greater than that of sediments from Geoje-Hansan Bay. Compared withother sites, Jinhae Bay was one of the most polluted coastal areas of Korea. The levels of geochemical indicators inMay were comparable to, or higher than, in August. Ammonium concentrations in pore water were two orders ofmagnitudes greater than the nitrate concentrations, suggesting that the bays are reducing environments. The concentrationsof total organic carbon in core sediment samples from shellfish-farming areas increased significantly from2000 to the present year, and it seems to be associated with increases in anthropogenic activities.

참고문헌 (38)

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