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题名: Phytoplankton community dynamics in West Lake after drawing water from the Qiantang River
作者: Wei Yinxin ; Li Jin ; Yu Zuoming
通讯作者: Wei Yinxin ; Inst Hydrobiol, Chinese Acad Sci, Wuhan, 430072, China
刊名: Chinese Journal of Oceanology and Limnology
发表日期: 2004
卷: 22, 期:2, 页:176-185
收录类别: 其他
英文摘要: Seventeen phytoplankton dominant species of 218 taxa were found to have contributed to more than 80% of the biomass after analysis of the January, 1955 to December, 1996 phytoplankton population at five stations in West Lake after Qiantang River water had been drawn into the lake for a decade. The seasonal fluctuations were obvious; the maximum cell density of 90.91 x 107 - 93.58 x 107 cells/L and biomass of 57.41 - 58.61 mg/L occurred mainly in summer of 1996, largely as a result of the development of Lyngbya contorta, Merismopedia tenuissima, Oscillatoria limnetica, Spirulina laxissima and Scenedesmus quadricauda, etc. at Stations 2 and 4. At Station 1 located near the inlet for drawing water from the Qiantang River, the species number, cell density, biomass, chlorophyll a concentration and physico-chemical parameters (except for total nitrogen) were obviously greater than those at the other four stations, also greater than the corresponding parameters before the drawing of water from the Qiantang River into the lake. Compared with the results of study on the phytoplankton community in 1980 before the drawing of Qiantang River into the lake, the species number and the total individual density were increased, the dominant species changed somewhat, the biomass was decreased. The water quality was improved (especially at Station 1) after the drawing of river water into the lake. Based on criteria for evaluating trophic status, the biological and chemical indicators such as species composition and dominant species, and other parameters such as annual mean value cell densities (36.06 x 107 - 51.27 x 107 cells/L), biomass (29.03 - 39.74 mg;/L), chl a concentrations (41.29 - 67.67 mug/L), total nitrigen (1.72-2.89 mg/L), total phosphorus (0.12-0.16 mg/L) obtained at Stations 2, 3, 4 and 5, showed that West Lake is still at eutrophic lake.
ISSN号: 0254-4059
内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/18169
Appears in Collections:中科院水生所知识产出(2009年前)_期刊论文

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Recommended Citation:
Wei Yinxin; Li Jin; Yu Zuoming.Phytoplankton community dynamics in West Lake after drawing water from the Qiantang River,Chinese Journal of Oceanology and Limnology,2004,22(2):176-185
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