In the flood season and dry season of 2000, the water quality and plankton distribution of Tangxi Reservoir were investigated to evaluate its trophic state. According to the comprehensive trophic level index (TLI), the values of Tangxi reservoir were between 30 and 50. It showed that the reservoir was mesotrophic. The phytoplankton abundances varied from 0.81×106 to 6.57×106 cells·L-1, and were higher in the flood season than in the dry season. The phytoplankton was primarily composed of Cyanophyta, Chlorophyta and Bacillariophyta. Most of the dominant species were eutrophication indicators such as Microcystis flos-aquae, Melosira granulata, Melosira minmum and Chlamydomonas sp.. The zooplankton abundances were between 43.25 ind.·L-1 and 812.2 ind.·L-1, and the dominant species were mostly eutrophication indicators: Keratella cochlearis, Brachipnus angularis, Asplanchna priodonta and Mesocyclops leuckart. In comparison with 1984, the dominant phylum changed from Cyanophyta to Bacillariophyta. Both trophic state and the phytoplankton abundance increased greatly. During a Microcystis bloom occurred in 2000, the maximum phytoplankton abundance in the surface water reached 11.97×106 cells·L-1.
赵帅营1, 林秋奇1, 胡韧1, 王朝晖1, 韩博平1*, 刘昂俊2. 汤溪水库的富营养化现状研究[J]. , 2002, 21(4): 316-319.
Zhao Shuaiying1, Lin Qiuqi1, Hu Ren1, Wang Zhaohui1, Han Boping1, Liu Angjun2. Current eutrophication in Tangxi Reservoir of Guangdong Province. , 2002, 21(4): 316-319.
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