The effects of extreme rainfall events on carbon release from biological soil crusts covered soil in fixed sand dunes in the Tengger Desert, northern China

查看全文 作　　者：Yang [1]Zhao;XinRong [1]Li;ZhiShan [1]Zhang;RongLiang [1]Jia;YiGang [1]Hu;Peng [1]Zhang

机构地区：[1]Shapotou Desert Research and Experiment Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences

出　　处：《Research in Cold and Arid Regions》索引2013年第5卷第2期,共6页

基　　金：supported by the Innovation Project of the Chinese Academy of Sciences(Grant No.KZCX2-EW-301-3);the National Natural Science Foundation of China(Grant Nos.41271061,41101081and40971033) 摘　　要：In May to August of 2011, we assessed the effects of extreme rainfall (quantity and intensity) events on the carbon release from soils covered by different types of biological soil crusts (BSCs) in fixed sand dunes in the Tengger Desert, northern China. A Li-6400-09 Soil Chamber was used to measure the respiration rates of the BSCs immediately after the rainfall stopped, and continued until the respiration rates of the BSCs returned to the pre-rainfall basal rate. Our results showed that almost immediately after extreme rainfall events the respiration rates of algae crust and mixed crust were significantly inhibited, but moss crust was not significantly affected. The respiration rates of algae crust, mixed crust, and moss crust in extreme rainfall quantity and intensity events were, respectively, 0.12 and 0.41 μmolCO 2 /(m 2 ·s), 0.10 and 0.45 μmolCO 2 /(m 2 ·s), 0.83 and 1.69 μmolCO 2 /(m 2 ·s). Our study indicated that moss crust in the advanced succession stage can well adapt to extreme rainfall events in the short term. 关键词：生物土壤结皮腾格里沙漠固定沙丘碳释放降雨事件中国北方覆盖

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The effects of extreme rainfall events on carbon release from biological soil crusts covered soil in fixed sand dunes in the Tengger Desert, northern China

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