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Spatio-temporal distribution of nitrogen in the undulating littoral zone of Lake Taihu, China

  • Hongjun Wang
  • Jinwei Lu
  • Weidong Wang
  • Peisheng Huang
  • Chengqing YinEmail author
Part of the Developments in Hydrobiology book series (DIHY, volume 194)

Abstract

Spatio-temporal distribution of nitrogen was examined along the gradient from open water to lakeshore in Lake Taihu, China. Two types of undulating littoral zones were selected: natural reed belt and bare lakeshore. The reed belt affected nitrogen transformation and was sink for internal-lake nitrogen, whereas the bare lakeshore showed little effect. During the growing season, NO 3 -N concentration increased by up to 3–5 times from open water to reed belt, while NH 4 + -N concentration decreased. It suggested that nitrification was the main nitrogen process in reed belt. Total dissolved nitrogen (TDN) showed little spatial variation, indicating that most of nitrogen released from sediment did not move into open water again. Significant temporal variation of dissolved nitrogen occurred and was similar in both the littoral zone and the open water. Maximum TDN and NH 4 + -N concentrations occurred in January, and NO 3 -N in March. Minimum NH 4 + -N and NO 3 -N concentrations occurred in July and August, respectively. An increasing total soil nitrogen was found in the surface sediments from reed belt to open water. This further suggested that the reed-covered littoral zone had strong nitrogen transformation potential.

Keywords

Nitrogen Distribution Spatial Temporal Littoral zone 

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Copyright information

© Springer Science+Business Media B.V. 2007

Authors and Affiliations

  • Hongjun Wang
    • 1
    • 2
  • Jinwei Lu
    • 1
    • 2
  • Weidong Wang
    • 1
  • Peisheng Huang
    • 3
  • Chengqing Yin
    • 1
    Email author
  1. 1.Research Center for Eco-Environmental Sciences, CASSKLEACBeijingP.R. China
  2. 2.Graduate University of the Chinese Academy of SciencesBeijingP.R. China
  3. 3.Institute of HydrobiologyJi’nan UniversityGuangzhouP.R. China

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