Responses of soil respiration to rainfall depth and frequency in semiarid grassland communities

doi:10.1002/eco.2326

	Responses of soil respiration to rainfall depth and frequency in semiarid grassland communities
	Zhang, He 2; Xiong, Peifeng 3; Jia, Zhao 2; Zhou, Junjie 2; Niu, Furong 4; Xu, Bingcheng 1,2
刊名	ECOHYDROLOGY
	2021-07-12
页码	15
关键词	grassland community Q(10) value rainfall depth rainfall frequency soil respiration
ISSN号	1936-0584
DOI	10.1002/eco.2326
通讯作者	Xu, Bingcheng(bcxu@ms.iswc.ac.cn)
英文摘要	Climate change is increasing the extreme precipitation depth and frequency, which may cause a strong response of ecological processes in drought regions. To investigate how rainfall depth and frequency alter soil respiration (SR), a rainfall simulation experiment was conducted in grassland communities dominated by Artemisia gmelinii and Lespedeza davurica in Loess Plateau of China. SR rate (R-s), soil temperature (T-s) and soil volumetric water content (S-v) were monitored before and after the rainfall treatments, that is, four depths (5, 10, 20 and 40 mm) and three frequencies (40 mm x 1, 20 mm x 2 and 10 mm x 4) during the growing season (June to September). Results indicated that the response magnitude of R-s increased with rainfall depths, reaching the maximum under 40 mm, and the increments were tightly related to rainfall frequency and community type. The increase and mean value of R-s in A. gmelinii community were significantly higher than those in L. davurica and bare land under same rainfall depth. L. davurica community was more sensitive to rainfall lower than 10 mm, whereas it had weaker but longer response under rainfall larger than 10 mm compared with A. gmelinii community. Successive rainfall events dampened the pulse effect of R-s but generated more cumulative CO2 emission in vegetation communities. T-s and S-v varied significantly with rainfall depth and co-regulated SR. These findings implied more CO2 will be released from soil in the semiarid grasslands under extreme and successive rainfalls and emphasized the importance of species impact on SR for soil carbon evaluation under future rainfall regimes.
资助项目	National Key Research and Development Program of China[2016YFC0501703] ; National Natural Science Foundation of China[41371509] ; National Natural Science Foundation of China[41771553]
WOS关键词	LOESS PLATEAU ; PRECIPITATION VARIABILITY ; DIFFERENTIAL RESPONSES ; TEMPERATURE-DEPENDENCE ; CARBON SEQUESTRATION ; MICROBIAL BIOMASS ; ORGANIC-CARBON ; PULSES ; WATER ; DESERT
WOS研究方向	Environmental Sciences & Ecology ; Water Resources
语种	英语
出版者	WILEY
WOS记录号	WOS:000672170500001
资助机构	National Key Research and Development Program of China ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/163867]
专题	中国科学院地理科学与资源研究所
通讯作者	Xu, Bingcheng
作者单位	1.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China 2.Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China 3.Anhui Agr Univ, Coll Resources & Environm, Hefei, Peoples R China 4.Univ Arizona, Sch Nat Resources & Environm, Tucson, AZ USA
推荐引用方式 GB/T 7714	Zhang, He,Xiong, Peifeng,Jia, Zhao,et al. Responses of soil respiration to rainfall depth and frequency in semiarid grassland communities[J]. ECOHYDROLOGY,2021:15.
APA	Zhang, He,Xiong, Peifeng,Jia, Zhao,Zhou, Junjie,Niu, Furong,&Xu, Bingcheng.(2021).Responses of soil respiration to rainfall depth and frequency in semiarid grassland communities.ECOHYDROLOGY,15.
MLA	Zhang, He,et al."Responses of soil respiration to rainfall depth and frequency in semiarid grassland communities".ECOHYDROLOGY (2021):15.