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JOURNAL OF DESERT RESEARCH  2013, Vol. 33 Issue (2): 543-548    DOI: 10.7522/j.issn.1000-694X.2013.00074
    
Effects of Extreme Rainfall Events on the Carbon Release of Biological Soil Crusts and the Covered Soil in Fixed Sand Dunes in the Tengger Desert, Northern China
ZHAO Yang1, QI Xin-lin2, CHEN Yong-le1, ZHANG Zhi-shan1, JIA Rong-liang1, HU Yi-gang1, ZHANG Peng1
1.Shapotou Desert Research and Experiment Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China;
2.School of Finance, Central University of Finance and Economics, Beijing 100081, China
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Abstract  

In May to August of 2011, the effects of natural extreme rainfall events on the carbon release of different types of Biological Soil Crusts (BSC) and the covered soil were measured in fixed sand dunes in the Tengger Desert, Northern China. An Li-6400-09 Soil Chamber was used to measure the respiration rate of the BSCs and the soil immediately after the rainfall stopped, until the respiration rate went close to the pre-rainfall basal rate. The results showed that the respiration rate of the algal crust and mixed crust were significantly restrained by extreme precipitation events in the initial stage after extreme rainfall events (extreme precipitation events and extreme rainfall intensity events), however, moss crust was not significantly influenced. The respiration rates of algal crust, mixed crust and moss crust in extreme precipitation events and extreme rainfall intensity events were 0.12 and 0.41 μmol·m-2·s-1, 0.10 μ mol·m-2·s-1 and 0.45 μmol·m-2·s-1, 0.83 μmol·m-2·s-1 and 1.69 μmol·m-2·s-1, respectively. Our study indicated that moss crust in advanced succession stage can adapt to extreme precipitation events better in a short period.

Key words:  carbon release      extreme rainfall events      Biological Soil Crust     
Received:  08 October 2012      Published:  28 December 2012
ZTFLH:  S154.1  

Cite this article: 

ZHAO Yang1, QI Xin-lin2, CHEN Yong-le1, ZHANG Zhi-shan1, JIA Rong-liang1, HU Yi-gang1, ZHANG Peng1. Effects of Extreme Rainfall Events on the Carbon Release of Biological Soil Crusts and the Covered Soil in Fixed Sand Dunes in the Tengger Desert, Northern China. JOURNAL OF DESERT RESEARCH, 2013, 33(2): 543-548.

URL: 

http://www.desert.ac.cn/EN/10.7522/j.issn.1000-694X.2013.00074     OR     http://www.desert.ac.cn/EN/Y2013/V33/I2/543

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