Effect of pulse precipitation on soil CO2 release in different grassland types on the Tibetan Plateau

doi:10.1016/j.ejsobi.2020.103250

	Effect of pulse precipitation on soil CO2 release in different grassland types on the Tibetan Plateau
	Xu, Min 4; Wu, Shuangshuang 4; Jiang, Zhaoxiao 4; Xu, Li 1; Li, Mingxu 1; Bian, Hongfeng 4; He, Nianpeng 1,2,3
刊名	EUROPEAN JOURNAL OF SOIL BIOLOGY
	2020-11-01
卷号	101 页码:8
关键词	Precipitation pulse Soil respiration Grassland Adaptation Decomposition Tibetan plateau
ISSN号	1164-5563
DOI	10.1016/j.ejsobi.2020.103250
通讯作者	Bian, Hongfeng(bianhf108@nenu.edu.cn) ; He, Nianpeng(henp@igsnrr.ac.cn)
英文摘要	Precipitation events may rapidly alter soil moisture, and potentially result in a large quantity of soil CO2 release in a short term. However, the effect of pulse precipitation on soil CO2 release among different grassland types on the Tibetan Plateau remains unclear. Here, we investigated soil CO2 release following pulse precipitation in the meadows, grasslands, and deserts of the Tibetan Plateau along a precipitation gradient. This was achieved using a new device that measures soil respiration rate (R-S) continuously and frequently, thus allowing us to conduct 48h simulation incubation experiments. We evaluated the pulse effect using the indices of the accumulation of microbial respiration carbon emission per gram of soil (A(Rs-Soil)) and the accumulation of microbial respiration carbon emission per gram of soil organic carbon (SOC) (A(Rs-SOC)). The results showed strong precipitation pulse effects, with A(Rs-Soil) and A(Rs-SOC) differing among the three grassland types owing to the soil properties, climate factors, and microbial biomass. A(Rs-Soil) was higher in alpine meadows than in alpine deserts and alpine grasslands because of the higher SOC. Conversely, A(Rs-SOC) was higher in alpine deserts (8.73 +/- 3.37 mg C g(-1) SOC) than in alpine meadows (2.66 +/- 0.91 mg C g(-1) SOC) and alpine grasslands (4.39 +/- 0.84 mg C g(-1) SOC). A(Rs-SOC)/ phospholipid fatty acid (PLFA) showed trends similar to ARs-SOC, thereby indicating that microbes in alpine desert were more sensitive to changes in soil moisture. Overall, the results show that the response of soil CO2 release to pulse precipitation in the Tibetan Plateau grasslands is related to grassland type. Furthermore, owing to the stronger response of soil microbes to pulse precipitation in arid regions, microbial responses to changing precipitation levels may be stronger under conditions of increasing drought in the future.
资助项目	Natural Science Foundation of China[31870437] ; Natural Science Foundation of China[31770655] ; Natural Science Foundation of China[41671045] ; National Key R&D program of China[2017YFC0503904]
WOS关键词	ORGANIC-MATTER DECOMPOSITION ; MICROBIAL RESPIRATION ; SPATIAL VARIABILITY ; ENZYME-ACTIVITIES ; N MINERALIZATION ; TEMPERATURE ; CARBON ; BIOMASS ; TIME
WOS研究方向	Environmental Sciences & Ecology ; Agriculture
语种	英语
出版者	ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
WOS记录号	WOS:000600974600004
资助机构	Natural Science Foundation of China ; National Key R&D program of China
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/137450]
专题	中国科学院地理科学与资源研究所
通讯作者	Bian, Hongfeng; He, Nianpeng
作者单位	1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China 2.Minist Educ, Key Lab Vegetat Ecol, Changchun 130024, Peoples R China 3.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China 4.Northeast Normal Univ, Sch Environm, State Environm Protect Key Lab Wetland Ecol & Veg, Changchun 130117, Peoples R China
推荐引用方式 GB/T 7714	Xu, Min,Wu, Shuangshuang,Jiang, Zhaoxiao,et al. Effect of pulse precipitation on soil CO2 release in different grassland types on the Tibetan Plateau[J]. EUROPEAN JOURNAL OF SOIL BIOLOGY,2020,101:8.
APA	Xu, Min.,Wu, Shuangshuang.,Jiang, Zhaoxiao.,Xu, Li.,Li, Mingxu.,...&He, Nianpeng.(2020).Effect of pulse precipitation on soil CO2 release in different grassland types on the Tibetan Plateau.EUROPEAN JOURNAL OF SOIL BIOLOGY,101,8.
MLA	Xu, Min,et al."Effect of pulse precipitation on soil CO2 release in different grassland types on the Tibetan Plateau".EUROPEAN JOURNAL OF SOIL BIOLOGY 101(2020):8.