Acta Geophysica

, Volume 64, Issue 6, pp 2471–2486 | Cite as

Distribution Characteristics of TOC, TN and TP in the Wetland Sediments of Longbao Lake in the San-Jiang Head Waters

  • Sujin Lu
  • Jianhua Si
  • Yue Qi
  • Zhanqing Wang
  • Xiaocui Wu
  • Chuanying Hou
Open Access


The study deals with the distribution of nutrients in wetland sediments, which provide the basis for revealing the wetland eutrophication processes and mechanisms of internal pollution sources. The total organic carbon (TOC), total nitrogen (TN), and total phosphorus (TP) contents and distribution characteristics of sediment samples were examined. The results showed that the TOC concentration ranged from 3.81 to 15.6 g/kg, the TN concentration ranged from 0.21 to 1.18 g/kg with a mean concentration of 0.66 g/kg, and the TP concentration ranged from 0.16 to 0.35 g/kg with a mean of 0.23 g/kg. Statistical analysis showed close correlations between TOC and TN (R2 = 0.96), and TN and TP (R2 = 0.97), which indicated that the TN and TP in the sediments were from similar sources. The concentrations of TOC, TN, and TP in Longbao Lake wetland sediments were too low for eutrophication to occur. Our investigation indicated that Longbao Lake undergoes natural evolution rather than anthropogenic activities.

Key words

Longbao Lake sediments organic carbon nitrogen phosphorus high altitude wetlands 


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Copyright information

© Lu et al. 2016

This is an open access article distributed under the Creative Commons Attribution-NonCommercial-NoDerivs license,

Authors and Affiliations

  • Sujin Lu
    • 1
  • Jianhua Si
    • 2
  • Yue Qi
    • 1
  • Zhanqing Wang
    • 1
  • Xiaocui Wu
    • 1
  • Chuanying Hou
    • 1
  1. 1.Eco-environmental Engineering CollegeQinghai University, Xi’ningQinghai ProvinceChina
  2. 2.College of Agriculture and Animal HusbandryQinghai UniversityXi’ning, Qinghai ProvinceChina

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