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http://dx.doi.org/10.7846/JKOSMEE.2016.19.4.274

Spatiotemporal Variations of Marine Environmental Characteristics in the Middle East Coast of Korea in 2013-2014  

Lee, Yong-Woo (Marine Environment Monitoring Team, Korea Marine Environment Management Corporation)
Park, Mi-Ok (Marine Environment Monitoring Team, Korea Marine Environment Management Corporation)
Kim, Seong-Soo (Marine Environment Monitoring Team, Korea Marine Environment Management Corporation)
Publication Information
Journal of the Korean Society for Marine Environment & Energy / v.19, no.4, 2016 , pp. 274-285 More about this Journal
Abstract
In order to elucidate the spatiotemporal variations of marine environmental parameters, we collected seawater samples in the middle east coast of Korea in 2013-2014. A high temperature and low salinity were distinctively observed in the summer and a low temperature and high salinity pattern in the winter. The temperature of the bottom water was in the range of $2^{\circ}C$ to $7^{\circ}C$, with the temperature being relatively high in the winter, while the salinity was measured to be around 34, with no large differences across the seasons. The dissolved oxygen concentrations were in the range of $7mg\;L^{-1}$ to $12mg\;L^{-1}$, and it was relatively high in May compared to other seasons. The seawater temperature and dissolved oxygen concentration at the surface layer showed a significant negative correlation in the autumn and winter seasons, based on which it is seemed that water temperature is the main factor controlling the amount of dissolved oxygen in the autumn and winter seasons. The dissolved inorganic nitrogen (DIN) and silicate (DSi) increased 11- and 7-fold, respectively, in the winter compared to the summer. The DIN to DIP (dissolved inorganic phosphorus) ratio for the surface seawater was approximately 16, but it was relatively low in the spring season. On the other hand, the DIN to DIP ratio was relatively high in the summer. Based on this, it is seemed that nitrogen and phosphorus were the growth-limiting nutrients for phytoplankton in the spring and summer, respectively. Water quality was I (excellent) ~III (medium) level at the most stations except for some stations (level IV) during the autumn season, having low dissolved oxygen saturations.
Keywords
Nutrient; Limiting factor; Dissolved oxygen; Water quality index; middle east coast of Korea;
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Times Cited By KSCI : 8  (Citation Analysis)
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