Hydrobiologia

, Volume 598, Issue 1, pp 35–45

The distributions of autumn picoplankton in relation to environmental factors in the reservoirs along the Wujiang River in Guizhou Province, SW China

  • Baoli Wang
  • Cong-Qiang Liu
  • Fushun Wang
  • Yuanxiu Yu
  • Lihua Zhang
Primary research paper

Abstract

Autumn picoplankton (Synechococcus, picoeukaryotes and heterotrophic bacteria) and environmental factors have been investigated in a series of reservoirs along the Wujiang River in Guizhou Province, SW China. The average abundances of Synechococcus, picoeukaryotes and heterotrophic bacteria was 104, 102 and 106 cells ml−1, respectively. In autumn meso-eutrophic reservoirs, thermal stratification was clear and abundances of different picoplankton groups in release water was low; whereas these phenomena were not obvious in autumn hypereutrophic reservoir. Picoplankton numbers decreased with increasing water depth and showed a positive correlation with water temperature, which reflected the importance of light and temperature on the picoplankton growth. Contribution of Synechococcus to total phytoplankton production and contribution of picoeukaryotes to total phytoplankton production asynchronous changed with varying trophic states. Synechococcus preferred meso-eutrophic reservoirs over hypereutrophic reservoir and picoeukaryotes showed no preference for the investigated reservoirs in autumn.

Keywords

Synechococcus Picoeukaryotes Heterotrophic bacteria Temperature 

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Copyright information

© Springer Science+Business Media B.V. 2007

Authors and Affiliations

  • Baoli Wang
    • 1
  • Cong-Qiang Liu
    • 1
  • Fushun Wang
    • 2
  • Yuanxiu Yu
    • 1
    • 3
  • Lihua Zhang
    • 4
  1. 1.State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry Chinese Academy of SciencesGuiyangP.R. China
  2. 2.Institute of Applied Radiation, School of Environmental and Chemical EngineeringShanghai UniversityShanghaiP.R. China
  3. 3.Graduate SchoolChinese Academy of SciencesBeijingP.R. China
  4. 4.State Key Laboratory of Estuarine and Coastal ResearchEast China Normal UniversityShanghaiP.R. China

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