Journal of the Korean Society of Marine Environment & Safety (해양환경안전학회지)

The Korean Society of Marine Environment and safety (해양환경안전학회)
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Estimating Benthic Nutrient Fluxes at the Sediment-Water Interface for the Management of Tidal Flats in Gomso and Geunso Bays

곰소만·근소만 갯벌어장 관리를 위한 퇴적물-해수 경계면에서 영양염 플럭스 추정

  • Jeon, Seung Ryul (Tidal Flat Research Center, National Institute of Fisheries Science) ;
  • Cho, Yoon-Sik (Tidal Flat Research Center, National Institute of Fisheries Science) ;
  • Choi, Yoon-Seok (Tidal Flat Research Center, National Institute of Fisheries Science) ;
  • Kim, Kyung-Tae (Environmental Health Research Department, National Institute of Environmental Research) ;
  • Choi, Yong-Hyeon (Tidal Flat Research Center, National Institute of Fisheries Science)
  • 전승렬 (국립수산과학원 갯벌연구센터) ;
  • 조윤식 (국립수산과학원 갯벌연구센터) ;
  • 최윤석 (국립수산과학원 갯벌연구센터) ;
  • 김경태 (국립환경과학원 환경건강연구부) ;
  • 최용현 (국립수산과학원 갯벌연구센터)
  • Received : 2017.09.27
  • Accepted : 2017.12.28
  • Published : 2017.12.31
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Abstract

It is important to understand interactions in the sediment-water environment because nitrate (N) and phosphorus (P) nutrient fluxes released into overlying water can represent a significant fraction of the total nutrient requirement for primary productivity. In this study, we analyzed and estimated benthic nutrient fluxes at the sediment-water interface, investigating environmental conditions in Gomso and Geunso Bays. Also, we compared previously reported nutrient flux data to identify regional differences. As a result, benthic nutrient fluxes in Beopsan were DIN: $6.14mmol\;m^{-2}d^{-1}$ and DIP: $0.32mmol\;m^{-2}d^{-1}$ higher than other survey sites. Sediment COD were $4.0-10.8mg/g{\cdot}dry$, and environmental deterioration was observed due to organic pollution. If no solution is found for tidal flat farm management, problems such as a decrease in aquaculture production will follow. Therefore, long-term monitoring of tidal flat environments should be pursued to enable the sustainable use of biological resources.

수층으로 용출되는 질소(N)와 인(P)의 영양염 플럭스는 1차 생산성에 대한 총 영양요구량의 상당 부분을 지원할 수 있기 때문에 퇴적물-해수 환경의 상호작용을 파악하는 것은 중요하다. 본 연구에서는 곰소만 근소만의 환경 일반항목들과 퇴적물-해수 경계면에서 저서 영양염 용출 플럭스를 분석 및 추정하였다. 또한 이전에 보고된 영양염 플럭스의 데이터를 비교하여 지역적인 차이를 확인하고자 하였다. 그 결과 근소만 법산에서 봄철 영양염 용출 플럭스가 DIN $6.14mmol\;m^{-2}d^{-1}$, DIP $0.32mmol\;m^{-2}d^{-1}$로 조사정점 중 가장 높게 나타났다. 퇴적물 COD의 경우 법산의 사계절 값이 $4.0{\sim}10.8mg/g{\cdot}dry$로 나타나 유기물 오염에 의한 환경 악화가 진행되고 있었다. 앞으로 갯벌어장 관리에 대한 방안이 마련되지 않는다면 양식생물의 생산량 감소의 문제가 발생될 것이다. 따라서 생물자원의 지속적인 이용을 위해 갯벌 환경의 장기적인 모니터링이 선행되어야 할 것으로 판단된다.

Keywords

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