Soil respiration in typical plant communities in the wetland surrounding the high-salinity Ebinur Lake

Research Article


Soil respiration in wetlands surrounding lakes is a vital component of the soil carbon cycle in arid regions. However, information remains limited on the soil respiration around highly saline lakes during the plant growing season. Here, we aimed to evaluate diurnal and seasonal variation in soil respiration to elucidate the controlling factors in the wetland of Ebinur Lake, Xinjiang Uygur Autonomous Region, western China. We used a soil carbon flux automatic analyzer (LI-840A) to measure soil respiration rates during the growing season (April to November) in two fields covered by reeds and tamarisk and one field with no vegetation (bare soil) from 2015 to 2016. The results showed a single peak in the diurnal pattern of soil respiration from 11:00 to 17:00 for plots covered in reeds, tamarisk, and bare soil, with minimum values being detected from 03:00 to 07:00. During the growing season, the soil respiration of reeds and tamarisk peaked during the thriving period (4.16 and 3.75 mmol•m–2•s–1, respectively), while that of bare soil peaked during the intermediate growth period (0.74 mmol•m–2•s–1). The soil respiration in all three plots was lowest during the wintering period (0.08, 0.09, and–0.87 mmol•m–2•s–1, respectively). Air temperature and relative humidity significantly influenced soil respiration. A significant linear relationship was detected between soil respiration and soil temperature for reeds, tamarisk, and bare soil. The average Q10 of reeds and tamarisk were larger than that of bare soil. However, soil moisture content was not the main factor controlling soil respiration. Soil respiration was negatively correlated with soil pH and soil salinity in all three plot types. In contrast, soil respiration was positively correlated with organic carbon. Overall, CO2 emissions and greenhouse gases had a relatively weak effect on the wetlands surrounding the highly saline Ebinur Lake.


Ebinur Lake soil respiration high salinity soil temperature soil moisture 


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The research was supported by the Key Laboratory Open Project Fund of Xinjiang Uygur Autonomous Region (No. 2015KL015).


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Copyright information

© Higher Education Press and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Xinjiang Normal UniversityCollege of Geography and TourismUrumqiChina
  2. 2.Key Laboratory of Xinjiang Uygur Autonomous RegionXinjiang Laboratory of Lake Environment and Resources in Arid AreaUrumqiChina
  3. 3.Institute of Geographical Sciences and Natural Resources ResearchChinese Academy of SciencesBeijingChina
  4. 4.College of Resources and EnvironmentUniversity of Chinese Academy of SciencesBeijingChina

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