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http://dx.doi.org/10.17663/JWR.2019.21.4.257

Seasonal variations of CO2 concentration and flux in vegetation and non-vegetation environments on the Muan tidal flat of Hampyong Bay  

So, Yoon Hwan (Environmental Research Institute, Pukyong National University)
Kang, Dong-hwan (Environmental Research Institute, Pukyong National University)
Kwon, Byung Hyuk (Department of Environmental Atmospheric Sciences, Pukyong National University)
Kim, Park Sa (Department of Environmental Atmospheric Sciences, Pukyong National University)
Publication Information
Journal of Wetlands Research / v.21, no.4, 2019 , pp. 257-266 More about this Journal
Abstract
In this study, we selected 6 vegetation sites (reed community) and 6 non-vegetation sites (tidal flat) in the Muan tidal flat of Hampyeong Bay, and observed seasonal changes in carbon dioxide concentration, flux and soil temperature at low tide conditions. The study was conducted to identify the characteristics of seasonal changes in vegetation and non-vegetation areas through the data observed in May 30, August 8, 2012 and January 31, 2013. The average carbon dioxide concentration in the vegetation area was the highest in winter, followed by spring and summer, and the non-vegetation area showed the same concentration change as the vegetation area. The carbon dioxide flux in the vegetation area showed a positive (+) value in both spring and summer, but it was negative (-) in the winter. The average value of carbon dioxide flux was the highest in spring, but it was almost similar to summer, and winter was the lowest negative value. Non-vegetation areas showed positive emission in spring, and negative uptake in summer and winter; mean values were the highest in spring, and the difference between summer and winter was small. In summary of seasonal change characteristics of the research area, the emission of carbon dioxide was dominant in both areas in spring. In summer, carbon dioxide emission was dominant in the vegetation area, and the non-vegetation area was observed to uptake by photosynthesis of phytoplankton, but it was very small. In winter, changes in flux in both areas were very slight.
Keywords
tidal flat; seasonal variation; carbon dioxide concentration; carbon dioxide flux;
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