Distribution of dinoflagellate cysts in Yellow Sea sediments |
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Authors: | SHIN Hyeon Ho LIM Dhongil PARK Soung-Yun HEO Seung and KIM So-Young |
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Institution: | 1.Library of Marine Samples, Korea Institute of Ocean Science and Technology, Geoje 656-830, Republic of Korea2.West Sea Fisheries Research Institute, National Fisheries Research & Development Institute, Incheon 400-420, Republic of Korea3.Division of Polar Climate Research, Korea Polar Research Institute, Songdomiraero 26, Yeonsu-gu, Incheon 406-840, Republic of Korea |
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Abstract: | To investigate the distribution, abundance, and species composition of dinoflagellate cysts in the Yellow Sea, surface sediment samples were collected at 37 sites, including the Korean dump site. Twenty-one dinoflagellate cyst taxa were identified, with the assemblages dominated mainly by Spiniferites bulloideus, Operculodinium centrocarpum, and cyst of Alexandrium catenella/tamarense type. A high frequency of O. centrocarpum in the Yellow Sea was observed for the first time, and it is likely that this can be attributed to the dynamics of the Yellow Sea Cold Water Mass and the Changjiang (Yangtze) River runoff. Total cyst concentrations ranged from 23 to 48 442 cysts/g dry weight, and high cyst concentrations were recorded adjacent to the dumping site. This result suggests that anthropogenic activities such as ocean dumping stimulate the growth of dinoflagellates in the Yellow Sea, which in turn leads to high levels of dinoflagellate cyst production. |
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Keywords: | Yellow Sea dumping site dinoflagellate cyst Alexandrium catenella/tamarense type Operculodinium centrocarpum |
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