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| Dynamics of soil respiration and its influential factors on artificial and natural reed wetlands in Boston Lake |
| Received:May 31, 2016 |
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| KeyWord:freshwater lake wetland;soil respiration;dynamic change;Boston Lake |
| Author Name | Affiliation | E-mail | | WANG Jin-long | Key Laboratory of Xinjiang Uygur Autonomous Region, Xinjiang Laboratory of Lake Environment and Resources in Arid Area, Urumqi 830054, China
Collegel of Geographic Science and Tourism, Xinjiang Normal University, Urumqi 830054, China | | | LI Yan-hong | Key Laboratory of Xinjiang Uygur Autonomous Region, Xinjiang Laboratory of Lake Environment and Resources in Arid Area, Urumqi 830054, China
Collegel of Geographic Science and Tourism, Xinjiang Normal University, Urumqi 830054, China | lyh0704@126.com | | LI Fa-dong | Key Laboratory of Xinjiang Uygur Autonomous Region, Xinjiang Laboratory of Lake Environment and Resources in Arid Area, Urumqi 830054, China
Collegel of Geographic Science and Tourism, Xinjiang Normal University, Urumqi 830054, China
Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
University of Chinese Academy of Sciences, Beijing 100049, China | |
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| Abstract: |
| Soil respiration from the surrounding wetland of a lake plays an important role in assessing soil carbon cycle and soil microbial metabolism in inland water ecosystem. In order to understand the dynamics of soil respiration in wetlands of artificial and natural reed(Phragmites australis), field observations were conducted from November 2014 to September 2015 by using LI-840A automated soil CO2 flux system in Bosten Lake located in arid areas of Western China. During monitoring periods, environmental variables(such as soil moisture, soil temperature, air moisture, air temperature) were also observed to determine the effects of abiotic factors on soil respiration in these two wetland ecosystems. Results showed that soil respiration existed obvious diurnal and seasonal patterns. The diurnal curve of the soil respiration was unimodal,with the peak appeared at 15:00. The seasonal change of soil respiration showed that the maximum values were occurred in July and August and the minimum values were in November, respectively. However, soil respiration rate for the artificial reed was greater than that for the natural reed(P<0.05). The soil respiration rate was mainly affected by the factors of ground ambient air temperature, ground air humidity and soil temperature at 5 cm depth. Soil organic carbon was positively correlated with soil respiration rate in both the artificial and natural reed, however, negatively with soil pH and soil salt. |
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