Phytoplankton community dynamics in West Lake after drawing water from the Qiantang River

Wei Yinxin; Li Jin; Yu Zuoming

doi:10.1007/BF02842590

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Phytoplankton community dynamics in West Lake after drawing water from the Qiantang River

Updated：2023-05-16

- Phytoplankton community dynamics in West Lake after drawing water from the Qiantang River
- Journal of Oceanology and Limnology Vol. 22, Issue 2, Pages: 176-185(2004)
- Affiliations：
  
  1. Institute of Hydrobiology the Chinese Academy of Sciences
  2. Institute of Environmental Science
- Author bio：
- Funds：
- DOI：10.1007/BF02842590
  CLC：
- Published：2004
- Accepted：
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Yinxin, W., Jin, L. & Zuoming, Y. Phytoplankton community dynamics in West Lake after drawing water from the Qiantang River., Chin. J. Ocean. Limnol. 22, 176–185 (2004). https://doi.org/10.1007/BF02842590
DOI：

Yinxin, W., Jin, L. & Zuoming, Y. Phytoplankton community dynamics in West Lake after drawing water from the Qiantang River., Chin. J. Ocean. Limnol. 22, 176–185 (2004). https://doi.org/10.1007/BF02842590 DOI：

摘要

Abstract

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 90.91×107–93.58.×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 ofLyngbya 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 some-what

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 (36.06×107–51.27×107 cells/L)

biomass (29.03–39.74 mg/L)

chl a concentrations (41.29–67.67μg/L)

total nitrigen (1.72–2.89 mg/L)

total phosphorus (0.12–0.16 mg/L) obtained at Stations 2

4 and 5

showed that West Lake is still at eutrophic lake.

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references

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