TITLE	Dinoflagellate associations in Feitsui Reservoir, Taiwan
AUTHOR	Jiunn-Tzong Wu Institute of Botany, Academia Sinica, Nankang, Taipei 11529, Taiwan, Republic of China Jin-Wen Chou Institute of Botany, Academia Sinica, Nankang, Taipei 11529, Taiwan, Republic of China
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ABSTRACT	In Feitsui Reservoir, dinoflagellate association was composed of three species: Ceratium furcoides (Levander) Langhans, Peridinium bipes Stein, and P. umbonatum Stein var. umbonatum. The environmental factors affecting their occurrence were studied at eight sites in the reservoir between January 1990 and December 1994. The peak occurrence of dinoflagellates, at water temperatures between 24 and 26°C, was related to the high watershed runoff due to monsoon rainfall in autumn. The abundance of dinoflagellates was positively correlated with the concentrations of phosphorus, total organic carbon, bacterial number, and chemical as well as biochemical oxygen demand in the water. The decrease in dinoflagellate abundance since 1991 has been followed by the prevalence of nannoplankton such as cyanobacteria and green algae. This coincided well with the continuous increase in N-nutrients in waters, which favors the growth of nannoplankton. It is assumed that N-nutrients play a more important role than P-nutrients in regulating the succession of dinoflagellates in this reservoir.
KEYWORD	Ceratium; Dinoflagellate association; Ecology; Feitsui Reservoir; Limnology; Peridinium; Phytoplankton;
ARTICLE INFO	Botanical Bulletin of Academia Sinica, Volume 39 Number 2 April 1998, page 137-145, 9 pages
PUBLISHER	Institute of Plant and Microbial Biology, Academia Sinica, Taipei, Taiwan, Republic of China