干旱区生态环境知识资源中心(Arid): Effect of pulse precipitation on soil CO2 release in different grassland types on the Tibetan Plateau

Arid

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; Wu, Shuangshuang; Jiang, Zhaoxiao; Xu, Li; Li, Mingxu; Bian, Hongfeng; He, Nianpeng
通讯作者	Bian, HF (corresponding author), Northeast Normal Univ, Sch Environm, State Environm Protect Key Lab Wetland Ecol & Veg, Changchun 130117, Peoples R China. ; He, NP (corresponding author), Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China.
来源期刊	EUROPEAN JOURNAL OF SOIL BIOLOGY
ISSN	1164-5563
EISSN	1778-3615
出版年	2020
卷号	101
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.
英文关键词	Precipitation pulse Soil respiration Grassland Adaptation Decomposition Tibetan plateau
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000600974600004
WOS关键词	ORGANIC-MATTER DECOMPOSITION ; MICROBIAL RESPIRATION ; SPATIAL VARIABILITY ; ENZYME-ACTIVITIES ; N MINERALIZATION ; TEMPERATURE ; CARBON ; BIOMASS ; TIME
WOS类目	Ecology ; Soil Science
WOS研究方向	Environmental Sciences & Ecology ; Agriculture
来源机构	中国科学院地理科学与资源研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/348841
作者单位	[Xu, Min; Wu, Shuangshuang; Jiang, Zhaoxiao; Bian, Hongfeng] Northeast Normal Univ, Sch Environm, State Environm Protect Key Lab Wetland Ecol & Veg, Changchun 130117, Peoples R China; [Xu, Li; Li, Mingxu; He, Nianpeng] Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China; [He, Nianpeng] Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China; [He, Nianpeng] Minist Educ, Key Lab Vegetat Ecol, Changchun 130024, 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]. 中国科学院地理科学与资源研究所,2020,101.
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.
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).