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http://dx.doi.org/10.11614/KSL.2017.50.4.422

Tracing Source and Concentration of Riverine Organic Carbon Transporting from Tamjin River to Gangjin Bay, Korea  

Park, Hyung-Geun (Division of Basic Research, National Institute of Ecology)
Kang, Dong-Won (Division of Ecological Survey Research, National Institute of Ecology)
Shin, Kyung-Hoon (Marine Sciences and Convergence Technology, Hanyang University)
Ock, Giyoung (Division of Basic Research, National Institute of Ecology)
Publication Information
Korean Journal of Ecology and Environment / v.50, no.4, 2017 , pp. 422-431 More about this Journal
Abstract
The biogeochemical information of riverine organic matter gives a detailed and integrated recording of natural and anthropogenic activity within a watershed. To investigate the changes in quality and quantity of organic carbon transporting from mountain to ocean via river channels, we estimated the concentrations of dissolved (DOC) and particulate organic carbon (POC), and then traced the source origin of POC using stable carbon isotopes ratio before and after summer rainfalls in the Tamjin River and Ganjin Bay, Korea. Along the small watershed, a total of 13 sites including headwaters, dam reservoir, river and estuary were established for the study. We found some interesting findings in the aspect of distribution of DOC/POC concentration changing their origin sources dynamically flowing downstream. In particular, the river channel transport downstream mainly DOC to river mouth, although upper dam reservoir increased POC concentration by phytoplankton production in summer. Whereas, in the river mouth and estuary, POC was dominated not only by local supply from nearby reed saltmarsh, but also by marine phytoplankton production, respectively. The findings can contribute to increasing the understanding of riverine organic carbon transport in upper large dam and lower open estuary system.
Keywords
organic carbon transport; dam impact; estuary; ecosystem linkage; POC;
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