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ALGAE > Volume 5(2); 1990 > Article
ALGAE 1990;5(2): 159-171.
The Structure and Dynamics of Phytoplankton Communities around the Coastline of Cheju Island, Korea
Joon-Baek Lee, You-Bong Go, Jong-Hun Choa
Department of Oceanography, Cheju National University
The dynamics and species composition of phytoplankton communities around the coast line of Cheju Island have been monthly investigated at ten coastal station from July. 1988 to June. 1989. A total of 245 species has been identified, including 196 of diatoms. 32 of dinoflagellates. 4 of silicoflagellates. 4 of euglena, 9 of blue-green algae. Diatoms represent 80.0% in total number of occurrence species. In ecological characteristics, the benthic and tychopelagic species compose more than 80% through-out the year and the neritic-oceanic species show increasing in winter season. It is speculated that the community structure of phytoplankton has been very closely related with the vicinity current including Kuroshio and the wind of all season. The distribution of standing crops show the range from 1,834 to 1,190,044 cell/l. being abundant in the eastern coast through the year. A total of 11 species was dominant in all coast, composing mainly the benthic diatom. Species diversity indices range from 0.700 to 3.051 and show relatively high value, presenting the stable communies of phytoplankton except April blooming by Chaetoceros socialis at one time.
Key words: community structure, phytoplankton, Cheju Island

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