Korean Journal of Fisheries and Aquatic Sciences (한국수산과학회지)

The Korean Society of Fisheries and Aquatic Science (한국수산과학회)
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Geochemical Characteristics of Intertidal Sediment in the Semi-enclosed Bays of the Southern Region of Jeollanam Province

전남 남부 반폐쇄적인 내만 갯벌 퇴적물의 지화학적 특성

  • Hwang, Dong-Woon (Marine Environment Research Division, National Fisheries Research & Development Institute) ;
  • Kim, Pyoung-Joong (Southwest Sea Fisheries Research Institute, National Fisheries Research & Development Institute) ;
  • Jeon, Sang-Back (Southwest Sea Fisheries Research Institute, National Fisheries Research & Development Institute) ;
  • Koh, Byoung-Seol (Marine Ecosystem Management Team, Korea Marine Environment Management Corporation)
  • Received : 2013.07.31
  • Accepted : 2013.09.25
  • Published : 2013.10.31
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Abstract

To understand the geochemical characteristics of intertidal sediment in a semi-enclosed bay, we measured various geochemical parameters, including grain size, ignition loss (IL), chemical oxygen demand (COD), acid volatile sulfide (AVS), and trace metals (Al, Fe, Cu, Pb, Zn, Cd, Hg, and As), in intertidal sediment from three bays (Deukryang Bay, Yeoja Bay, and Gamak Bay) in the southern region of Jeollanam Province. The intertidal sediment in Deukryang Bay consisted of various sedimentary types, such as sand, gravelly muddy sand, mud, and silt, whereas the intertidal sediments in Yeoja and Gamak Bays were composed mainly of mud. The concentrations of IL, COD, AVS and trace metals in the intertidal sediments of the three study regions were relatively high near areas affected by input of stream waters and/or shellfish farming waste. The concentrations of organic matter and trace metals in Gamak Bay were much higher than those in Deukryang and Yeoja Bays, which appears to be due to the influence of anthropogenic pollutants, originating from the city and the industrial complex near Gamak Bay. The evaluation results of organic matter and metal pollution using the sediment quality guidelines showed that the intertidal sediments in the three study regions were not polluted in terms of organic matter and trace metals. In future, sustainable management for sources of organic matter and trace metal is necessary to conserve a healthy benthic ecosystem in intertidal sediments.

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References

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