干旱区生态环境知识资源中心(Arid): 极端降雨事件对不同类型生物土壤结皮覆盖土壤碳释放的影响

Arid

	极端降雨事件对不同类型生物土壤结皮覆盖土壤碳释放的影响
其他题名	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
	赵洋 1; 齐欣林 2; 陈永乐 1; 张志山1 ; 贾荣亮 1; 胡宜刚 1; 张鹏1
来源期刊	中国沙漠
ISSN	1000-694X
出版年	2013
卷号	33 期号:2 页码:543-548
中文摘要	于2011年58月,选择腾格里沙漠东南缘人工固沙植被区藻类、藓类和混生结皮覆盖的土壤为对象,研究了极端降雨量(降雨量44.7mm、强度0.04mm?min~(-1))、极端降雨强度(降雨量8.3mm、强度0.55mm?min~(-1))及普通降雨(降雨量16.3mm、强度0.02mm?min~(-1))条件下的碳释放过程。碳释放量的测定采用Li-6400-09土壤呼吸室,降雨结束后立即开始观测,直到呼吸速率恢复到降雨前水平时停止观测。结果表明:极端降雨(降雨量和降雨强度)结束初期藻类和混生结皮覆盖土壤的呼吸速率受到明显抑制,藻类结皮覆盖土壤呼吸速率分别为0.12mumol?m~(-2)?s~(-1)和0.41mumol?m~(-2)?s~(-1),混生结皮覆盖土壤呼吸速率分别为0.10mumol?m~(-2)?s~(-1)和0.45mumol?m~(-2)?s~(-1);而极端降雨对藓类结皮覆盖土壤的影响不明显,呼吸速率分别为0.83mumol?m~(-2)?s~(-1)和1.69mumol?m~(-2)?s~(-1)。这说明处于演替高级阶段的藓类结皮能够很好地应对短期的极端降雨事件。
英文摘要	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 prerainfall 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. 41mumol?m~ (-2) ?s~ (-1), 0. 10mumol?m~ (-2) ?s~ (-1) and 0. 45 mumol?m~ (-2) ?s~ (-1), 0. 83mumol?m~ (-2) ?s~ (-1) and 1. 69mumol?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.
中文关键词	碳释放 ; 极端降雨事件 ; 生物土壤结皮
英文关键词	carbon release extreme rainfall events Biological Soil Crust
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:4804640
来源机构	中国科学院西北生态环境资源研究院
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/230590
作者单位	1.中国科学院寒区旱区环境与工程研究所沙坡头沙漠试验研究站, 兰州, 甘肃 730000, 中国; 2.中央财经大学金融学院, 北京 100081, 中国
推荐引用方式 GB/T 7714	赵洋,齐欣林,陈永乐,等. 极端降雨事件对不同类型生物土壤结皮覆盖土壤碳释放的影响[J]. 中国科学院西北生态环境资源研究院,2013,33(2):543-548.
APA	赵洋.,齐欣林.,陈永乐.,张志山.,贾荣亮.,...&张鹏.(2013).极端降雨事件对不同类型生物土壤结皮覆盖土壤碳释放的影响.中国沙漠,33(2),543-548.
MLA	赵洋,et al."极端降雨事件对不同类型生物土壤结皮覆盖土壤碳释放的影响".中国沙漠 33.2(2013):543-548.