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

The Korean Society of Marine Environment and safety (해양환경안전학회)
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Mass Balance Using the LOICZ Model in Gomso and Geunso Bays

LOICZ 모델을 이용한 곰소만, 근소만 갯벌어장 물질수지 산정

  • Choi, Yong-Hyeon (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) ;
  • Jeon, Seung Ryul (Tidal Flat Research Center, National Institute of Fisheries science)
  • 최용현 (국립수산과학원 갯벌연구센터) ;
  • 조윤식 (국립수산과학원 갯벌연구센터) ;
  • 최윤석 (국립수산과학원 갯벌연구센터) ;
  • 전승렬 (국립수산과학원 갯벌연구센터)
  • Received : 2017.09.27
  • Accepted : 2017.12.28
  • Published : 2017.12.31
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Abstract

Recently, Gomso Bay saw a decrease in the production of manila clam, which accounted for 17.8 % of production across the whole country in 2015, while Geunso Bay saw an increase that raised its contribution to 49.1 %. The tidal flats in these bays are inhabited by various benthos, and material flows in and out according to the tide. It is essential to understand the mass balance of these regions while giving consideration to the characteristics of these tidal flats. In this study, we compared areas where aquaculture farms were located in Gomso Bay with those without from May to August 2015. We divided the region into three sea areas (Sector I, Sector II, and Control), and the mass balance was estimated using the LOICZ model. As a result, the DIP of Sector II in Gomso Bay and another region in Geunso Bay, where a manila clam farm was located, were found to be -207.2 kg/day and 77.2 kg/day. The DIN was -4,996.7 kg/day and 926.6 kg/day. These results suggest that Gomso Bay han a higher density than Geunso Bay, which is thought to be mainly due to the feeding action of organisms. Therefore, in order to maintain a healthy tidal flat ecosystem and to sustain the production of manila clams, sustainable management to reduce the high density of tidal flat farms is necessary.

최근 전북 지역은 바지락 생산량이 감소하여 2015년에 전국 생산량의 17.8 %를 차지한 반면, 충남 지역은 점차 증가하여 49.1 %를 차지하였다. 갯벌은 다양한 저서생물이 서식하고 있고, 조석에 의해 물질이 유출 입되는 특성이 있기 때문에 만의 특성을 고려한 물질 수지를 이해하는 것이 중요하다. 본 연구에서는 2015년 5월과 8월에 곰소만과 근소만의 바지락 어장 지역과 외해지역의 차이를 비교하기 위해 3개의 해역(Sector I, Sector II, Control)으로 구분하고, LOICZ Model을 이용하여 물질수지를 산정하였다. 분석결과 바지락 성장이 활발한 5월에 바지락 양식장이 밀집한 곰소만과 근소만 Sector II의 DIP는 각각 -207.2 kg/day와 77.2 kg/day로 나타났고, DIN은 -4,996.7 kg/day와 926.6 kg/day로 나타났다. 주로 양식생물의 섭식작용에 큰 원인으로 보이며, 근소만보다 곰소만에서 바지락 밀식이 이루어지는 것으로 판단된다. 따라서 건강한 갯벌 생태계 유지와 지속적인 바지락 생산을 위해서는 밀식을 저감하기 위한 지속적인 관리가 필요하다.

Keywords

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