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A Study of Organic Matter and Dinoflagellate Cyst on Surface Sediments in the Central Parts of South Sea, Korea  

Park Jong Sick (Department of Fisheries Science, Graduate School of Yosu National University)
Yoon Yang Ho (Department of Fisheries Science, Graduate School of Yosu National University)
Noh Il Hyeon (Division of Aqua-life Science, Yosu National University)
Soh Ho Young (Department of Fisheries Science, Graduate School of Yosu National University)
Publication Information
Korean Journal of Environmental Biology / v.23, no.2, 2005 , pp. 163-172 More about this Journal
Abstract
Field survey on the marine environmental characteristics by the distribution of dinoflagellate cysts and organic matter carried out bimonthly at 14 stations in the central parts of South Sea, Korea from April 2002 to January 2003. The range of environmental factors on surface sediments such as water content, ignition loss (IL), chemical oxygen demand (CODs), particulate organic carbon (POC), particulate organic nitrogen (PON) and phaeopigment were $38.7\~68.9\%,\;3.9\~12.5\%,\;9.60\~44.05mgO_2\;gdry^{-1},\;3.12\~13.14mgC\; gdry^{-1},\;0.49\~2.01mgN\;gdry^{-1}\;and\;1.61\~29.51{\mu}g\;gdry^{-1}\;gdry-1$, respectively. A total dinoflagellate cysts identified were 33 species, which belonged to 18 genera,31 species, and 2 unidentified species. A cysts density were $42\~2,880\; cysts\;gdry^{-1}$. The dominant species of dinoflagellate cysts were Spinrferites bulloideus and Scrippsiella trochoidea all the year and autotrophic species was more abundant than heterotrophic species. The organic matter and dinoflgellate cysts were more abundant nearshore than offshore, and the origin of organic matter was autochthonous rather than from terrestrial. The two factors derived from the loading factor of PCA. Factor 1 was 'accumulation of oragnic matter in the offshore', factor 2 was 'cysts abundance', and the central parts of Korean South Sea was separated with 3 regions by score distribution of PCA.
Keywords
surface sediment; dinoflagellate cyst; organic matter; autotrophic and heterotrophic species; PCA; central parts of Korean South Sea;
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