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2011년 11월 고성만 굴( Crassostrea gigas ) 양식장 수질환경 모니터링을 통한 이산화탄소 수지 평가
심정희 ( Jeong Hee Shim ),예미주 ( Mi Ju Ye ),임재현 ( Jae Hyun Lim ),권정노 ( Jung No Kwon ) 한국수산과학회 2014 한국수산과학회지 Vol.47 No.6
Abstract: Real-time monitoring for environmental factors (temperature, salinity, chlorophylla , etc.) and fugacity of carbon dioxide ( f CO2) was conducted at an oyster Crassostrea gigas farm in Goseong Bay, south coast of Korea during 2-4th of November, 2011. Surface temperature and salinity were ranged from 17.9-18.7℃ and 32.7-33.8, respectively, with daily and inter-daily variations due to tidal currents. Surface f CO2 showed a range of 390-510 μatm and was higher than air CO2 during the study period. Surface temperature, salinity and f CO2 are showed significant correlations with chl.a and nutrients, respectively. It means when chl.-a value is high in surface water of the oyster farm, active biological production consume CO2 and nutrients from environments and produce oxygen, suggesting a tight feedback between biological processes and environmental reaction. Thus, factors affecting the surface f CO2 were evaluated using a simple mass balance. Temperature and biological productions by phytoplankton are the main factors for CO2 drawdown from afternoon to early night, while biological respiration increases seawater CO2 at night. Air-sea exchange fraction acts as a CO2 decreasing gear during the study period and is much effective when the wind speed is higher than 2-3 m s-1. Future studies about organic carbon and biological production/respiration are required for evaluating the roles of oyster farms on carbon sink and coastal carbon cycle.
김숙양,이용화,김영숙,심정희,예미주,전지원,황재란,전상호 한국자연보호학회 2012 한국자연보호학회지 Vol.6 No.2
As for the Jinhae bay in 2010, hypoxia under DO concentration 3 mg/L began to form from the station where thermocline formed in the early June, and hypoxia disappeared in the late October as thermocline did. DIP and DIN was much higher in the bottom water of the sea where hypoxia occurred, and pH showed its low distribution. IL, COD and AVS of the surface sediment were shown relatively high at the station which is affected by the inflow of land water from the bay Masan bay and at the station where hypoxia remains for a long time. As for benthos distribution, macrobenthos never appeared at the survey station 8 and 23 which are near the bay Hangam bay and Gohyeonseong bay and macrobenthos appeared most diversely at the survey station 11 where hypoxia did not occur. Density was also minimum at the survey station 19, 21, and 23 where hypoxia occurred, whereas density was relatively high at the survey station 11, 13 and 14 where oxygendeficient phenomenon did not occurred. Meanwhile, biomass was lowest at the survey station 23 which is affected by sewage coming from the bay Wonmun bay and shipbuilding industry, whereas biomass was highest at the survey station 14 and 11. As for benthos of the Jinhae bay, species richness and diversity was relatively high at the survey station 11, 12, 13 and 14 where hypoxia did not occur, and thus it showed relatively good benthic community structure. Like this, hypoxia appears in the bay Jinhae bay for about 5 to 6 months annually, and during that period, most of the marine environmental factors appear to be abnormal. Therefore, we need the fundamental measures to reduce hypoxia for the purpose of producing marine products continuously.