자란만 표층 퇴적물의 생화학적 조성과 퇴적물-수층 경계면에서 물질 플럭스 변동에 관한 연구

Abstract

To induce sustainable production of oyster farming in Jaran Bay, this study investigated the spatial and temporal changes in the biochemical composition of sedimentary organic matter and the material flux across the sediment-water interface. Sediment samples were collected in May 2015 and from August 2015 to February 2016 on a monthly basis. Material fluxes using a benthic chamber were estimated in October and December 2015. The biochemical classes of organic matter were dominated by proteins, followed by carbohydrates and lipids. The proteins might be the dominant class among labile compounds because about 60% of the body of the oyster is made up of proteins. The PLG:OM ratio, which represents the percentage of labile organic matter, ranged from 9.82 to 25.18%. The P:G ratio, which represents the presence of newly produced matter, ranged from 0.94 to 5.80. This result may indicate that labile organic matter in Jaran Bay might be fresh material that was recently formed. SOD ranged from 15 to 132 mmol/m2/day, SPM ranged from 7.5 to 91.1 g/m2/day, POC ranged from 0.43 to 2.36 g/m2/day, and PON ranged from 0.02 to 0.32 g/m2/day. Also, DIN and DIP effluxes were 5.14±5.5 mmol/m2/day and 0.38±0.33 mmol/m2/day, respectively. The burial flux was also lower than in other aquacultural areas along the southern coast of Korea. Therefore, Jaran Bay might have potential for sustainable production than other shellfish farming.