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http://dx.doi.org/10.5657/KFAS.2014.1026

Evaluation of Simple CO2 Budget with Environmental Monitoring at an Oyster Crassostrea gigas Farm in Goseong Bay, South Coast of Korea in November 2011  

Shim, JeongHee (Marine Environment Research Division, National Fisheries Research and Development Institute)
Ye, Miju (Marine Environment Research Division, National Fisheries Research and Development Institute)
Lim, Jae-Hyun (Marine Environment Research Division, National Fisheries Research and Development Institute)
Kwon, Jung-No (Marine Environment Research Division, National Fisheries Research and Development Institute)
Publication Information
Korean Journal of Fisheries and Aquatic Sciences / v.47, no.6, 2014 , pp. 1026-1036 More about this Journal
Abstract
Real-time monitoring for environmental factors (temperature, salinity, chlorophyll-a, etc.) and fugacity of carbon dioxide ($fCO_2$) 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 $17.9-18.7^{\circ}C$ and 32.7-33.8, respectively, with daily and inter-daily variations due to tidal currents. Surface $fCO_2$ showed a range of $390-510{\mu}atm$ and was higher than air $CO_2$ during the study period. Surface temperature, salinity and $fCO_2$ 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 $CO_2$ and nutrients from environments and produce oxygen, suggesting a tight feedback between biological processes and environmental reaction. Thus, factors affecting the surface $fCO_2$ were evaluated using a simple mass balance. Temperature and biological productions by phytoplankton are the main factors for $CO_2$ drawdown from afternoon to early night, while biological respiration increases seawater $CO_2$ at night. Air-sea exchange fraction acts as a $CO_2$ decreasing gear during the study period and is much effective when the wind speed is higher than $2-3m\;s^{-1}$. 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.
Keywords
Realtime Monitoring; Oyster; Aquaculture Farm; Fugacity of carbon dioxide ($fCO_2$) in seawater; Carbon budget (mass balance);
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
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