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Current eutrophication in Tangxi Reservoir of Guangdong Province
Zhao Shuaiying1, Lin Qiuqi1, Hu Ren1, Wang Zhaohui1, Han Boping1, Liu Angjun2
1. Institute of Hydrobiology, Jinan University, Guangzhou 510632; 2. Hydrology Bureau of Shantou, Shantou 515041
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Abstract  

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.

Key wordsTangxi Reservoir      Eutrophication      Nutrient      Plankton     
Received: 25 August 2002     
:  Q178.513  
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Articles by authors
Zhao Shuaiying
Lin Qiuqi
Hu Ren
Wang Zhaohui
Han Boping
Liu Angjun
Cite this article:   
Zhao Shuaiying,Lin Qiuqi,Hu Ren, et al. Current eutrophication in Tangxi Reservoir of Guangdong Province[J]. , 2002, 21(4): 316-319.
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http://www.ecolsci.com/EN/     OR     http://www.ecolsci.com/EN/Y2002/V21/I4/316
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