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  • ISSN 1000-694X
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CH4 Flux Characteristics of Qinghai Lake Alpine Wetland Ecosystem during Growing Season

  • Wu Fangtao ,
  • Cao Shengkui ,
  • Cao Guangchao ,
  • Han Guangzhao ,
  • Lin Yangyang ,
  • Cheng Shuyan
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  • 1. College of Life and Geography Sciences, Qinghai Normal University, Xining 810008, China;
    2. Qinghai Province Key Laboratory of Physical Geography and Environmental Process, Qinghai Normal University, Xining 810008, China

Received date: 2017-04-16

  Revised date: 2017-06-14

  Online published: 2018-11-03

Abstract

Taking the Qinghai Lake alpine wetland ecosystem as the research object, the CH4 flux of 2015 and 2016 years was studied using the eddy covariance method. Results show that the average diurnal variation of CH4 emission in the daytime and weakly absorbed or emissioned at night, with daily average value was 56.67 mg·m-2 in 2015, and the value was 35.92 mg·m-2 in 2016. July and August of the growing season wre the largest monthly emissions, while emissions were weaker in the early and late growth season. The maximum monthly emission in 2015 was in July, with a value of 3.76 g·m-2, 2016 the maximum monthly emission occurred in August with a value of 1.67 g·m-2. There was a significant correlation between temperature, soil conductivity, soil volume water content and CH4 flux, among them the air temperature is liningly related to CH4 flux. There was also a significant correlation between total primary productivity, respiration, hydrothermal flux and CH4 flux, and the primary productivity and respiration of ecosystems were the main factors affecting the dynamic change of methane.

Cite this article

Wu Fangtao , Cao Shengkui , Cao Guangchao , Han Guangzhao , Lin Yangyang , Cheng Shuyan . CH4 Flux Characteristics of Qinghai Lake Alpine Wetland Ecosystem during Growing Season[J]. Journal of Desert Research, 2018 , 38(5) : 1078 -1085 . DOI: 10.7522/j.issn.1000-694X.2017.00057

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