干旱区生态环境知识资源中心(Arid): Effect of global warming on soil respiration and cumulative carbon release in biocrust-dominated areas in the Tengger Desert, northern China

Arid

DOI	10.1007/s11368-018-2171-4
	Effect of global warming on soil respiration and cumulative carbon release in biocrust-dominated areas in the Tengger Desert, northern China
	Guan, Chao 1,2; Li, Xinrong1 ; Zhang, Peng1 ; Li, Chenhui 3
通讯作者	Guan, Chao
来源期刊	JOURNAL OF SOILS AND SEDIMENTS
ISSN	1439-0108
EISSN	1614-7480
出版年	2019
卷号	19 期号:3 页码:1161-1170
英文摘要	PurposeGlobal warming is expected to have profound effects on terrestrial carbon (C) fluxes, consequently influencing future climate. Biocrusts are important sources of C in the C cycle of desert ecosystems, where vascular plants are restricted by limited soil moisture. This study was conducted in order to evaluate the expected increases in temperature on soil respiration in biocrust-dominated areas.Materials and methodsIn a field warming experiment, we evaluated the impact of increased temperature on soil respiration in biocrust-dominated (moss-crusted and lichen-crusted) areas in Shapotou, China. In addition, the impacts of precipitation, soil temperature, and moisture on soil respiration were investigated.Results and discussionThe effect of warming on soil respiration varied with soil water availability. Our results showed that soil respiration in moss-crusted and lichen-crusted areas in the warming treatment was significantly lower than that in the control. The observed inhibition of soil respiration by the increase in soil temperature was likely due to the reduction in soil moisture caused by the increased water evaporation rate under higher soil temperature. Warming also decreased cumulative C release in moss-crusted and lichen-crusted areas. Moreover, cumulative C release showed marked seasonal variations, with the highest C release occurring in summer and the lowest in winter. Over the seasonal cycle, soil respiration rates were positively correlated with precipitation, soil temperature, and volumetric soil water content.ConclusionsThe results of this study indicate that warming may increase the sensitivity of soil respiration to water availability in biocrust-dominated areas in desert ecosystems, suggesting that biocrust should be considered in projections of future C budget.
英文关键词	Biological soil crust Precipitation Seasonality Soil respiration Stimulated warming Cumulative C release
类型	Article
语种	英语
国家	Peoples R China ; USA
收录类别	SCI-E
WOS记录号	WOS:000459805400011
WOS关键词	CLIMATE-CHANGE ; MICROBIAL RESPIRATION ; NITROGEN ADDITION ; TEMPERATE DESERT ; NET ECOSYSTEM ; CO2 EFFLUX ; PRECIPITATION ; RESPONSES ; CRUSTS ; WATER
WOS类目	Environmental Sciences ; Soil Science
WOS研究方向	Environmental Sciences & Ecology ; Agriculture
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/217323
作者单位	1.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Shapotou Desert Res & Expt Stn, Lanzhou 730000, Gansu, Peoples R China; 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China; 3.Univ Missouri, Sch Nat Resources, Columbia, MO 65201 USA
推荐引用方式 GB/T 7714	Guan, Chao,Li, Xinrong,Zhang, Peng,et al. Effect of global warming on soil respiration and cumulative carbon release in biocrust-dominated areas in the Tengger Desert, northern China[J],2019,19(3):1161-1170.
APA	Guan, Chao,Li, Xinrong,Zhang, Peng,&Li, Chenhui.(2019).Effect of global warming on soil respiration and cumulative carbon release in biocrust-dominated areas in the Tengger Desert, northern China.JOURNAL OF SOILS AND SEDIMENTS,19(3),1161-1170.
MLA	Guan, Chao,et al."Effect of global warming on soil respiration and cumulative carbon release in biocrust-dominated areas in the Tengger Desert, northern China".JOURNAL OF SOILS AND SEDIMENTS 19.3(2019):1161-1170.