Precipitation Regime Shift Enhanced the Rain Pulse Effect on Soil Respiration in a Semi-Arid Steppe

doi:10.1371/journal.pone.0104217

	Precipitation Regime Shift Enhanced the Rain Pulse Effect on Soil Respiration in a Semi-Arid Steppe
	Yan, Liming 1; Chen, Shiping; Xia, Jianyang 2; Luo, Yiqi 2
	2014
发表期刊	PLOS ONE
ISSN	1932-6203
卷号	9 期号:8
摘要	The effect of resource pulses, such as rainfall events, on soil respiration plays an important role in controlling grassland carbon balance, but how shifts in long-term precipitation regime regulate rain pulse effect on soil respiration is still unclear. We first quantified the influence of rainfall event on soil respiration based on a two-year (2006 and 2009) continuously measured soil respiration data set in a temperate steppe in northern China. In 2006 and 2009, soil carbon release induced by rainfall events contributed about 44.5% (83.3 g C m(-2)) and 39.6% (61.7 g C m(-2)) to the growing-season total soil respiration, respectively. The pulse effect of rainfall event on soil respiration can be accurately predicted by a water status index (WSI), which is the product of rainfall event size and the ratio between antecedent soil temperature to moisture at the depth of 10 cm (r(2)=0.92, P<0.001) through the growing season. It indicates the pulse effect can be enhanced by not only larger individual rainfall event, but also higher soil temperature/moisture ratio which is usually associated with longer dry spells. We then analyzed a long-term (1953-2009) precipitation record in the experimental area. We found both the extreme heavy rainfall events (>40 mm per event) and the long dry-spells (>5 days) during the growing seasons increased from 1953-2009. It suggests the shift in precipitation regime has increased the contribution of rain pulse effect to growing-season total soil respiration in this region. These findings highlight the importance of incorporating precipitation regime shift and its impacts on the rain pulse effect into the future predictions of grassland carbon cycle under climate change.
学科领域	Multidisciplinary Sciences
DOI	10.1371/journal.pone.0104217
收录类别	SCI
语种	英语
WOS关键词	CO2 EFFLUX ; DIFFERENTIAL RESPONSES ; ECOSYSTEM RESPIRATION ; TEMPORAL VARIATION ; MICROBIAL BIOMASS ; SONORAN DESERT ; CLIMATE-CHANGE ; ELEVATED CO2 ; CARBON ; WATER
WOS研究方向	Science & Technology - Other Topics
WOS记录号	WOS:000341357200087
出版者	PUBLIC LIBRARY SCIENCE
文献子类	Article
出版地	SAN FRANCISCO
资助机构	Strategic Priority Research Program of the Chinese Academy of Sciences, Climate Change: Carbon Budget and Relevant Issues [XDA05050402] ; National Natural Science Foundation of China [31170453] ; National Basic Research Program of China (973 program) [2010CB833501] ; Selected Young Scientist Program of the State Key Laboratory of Vegetation and Environment Change
作者邮箱	spchen@ibcas.ac.cn
作品OA属性	gold, Green Submitted, Green Published
引用统计	被引频次：51[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/27348
专题	植被与环境变化国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing, Peoples R China 2.Fudan Univ, Sch Life Sci, Shanghai 200433, Peoples R China 3.Univ Oklahoma, Dept Bot & Microbiol, Norman, OK 73019 USA
推荐引用方式 GB/T 7714	Yan, Liming,Chen, Shiping,Xia, Jianyang,et al. Precipitation Regime Shift Enhanced the Rain Pulse Effect on Soil Respiration in a Semi-Arid Steppe[J]. PLOS ONE,2014,9(8).
APA	Yan, Liming,Chen, Shiping,Xia, Jianyang,&Luo, Yiqi.(2014).Precipitation Regime Shift Enhanced the Rain Pulse Effect on Soil Respiration in a Semi-Arid Steppe.PLOS ONE,9(8).
MLA	Yan, Liming,et al."Precipitation Regime Shift Enhanced the Rain Pulse Effect on Soil Respiration in a Semi-Arid Steppe".PLOS ONE 9.8(2014).

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