Responses of soil respiration and its components to experimental warming in an alpine scrub ecosystem on the eastern Qinghai-Tibet Plateau

doi:10.1016/j.scitotenv.2018.06.243

CORC > 成都生物研究所 > 中国科学院成都生物研究所 > 生物多样性与生态系统服务领域 > 中国科学院山地生态恢复与生物资源利用重点实验室

	Responses of soil respiration and its components to experimental warming in an alpine scrub ecosystem on the eastern Qinghai-Tibet Plateau
	Ma, Zhiliang 1,2,3; Zhao, Wenqiang 1; Liu, Mei 1,2; Liu, Qing 1
刊名	SCIENCE OF THE TOTAL ENVIRONMENT
	2018
卷号	643 期号:2018 页码:1427-1435
关键词	Soil respiration Heterotrophic respiration Rhizosphere respiration Experimental warming Alpine scrub Qinghai-Tibet Plateau
ISSN号	0048-9697
DOI	10.1016/j.scitotenv.2018.06.243
产权排序	1
文献子类	Article
英文摘要	The responses of soil respiration (R-s) to warming are driven by its components, that is, heterotrophic respiration (R-h) and rhizosphere respiration (R-r, including fine root respiration [R-fr] and rhizomicrobial respiration [R-z]). However, the effects of warming on R-s and its components are rarely studied in alpine scrub ecosystems on the Qinghai-Tibet Plateau. Here, we conducted a warming experiment to examine how R-s and its components respond to experimental warming. We found that one-year experimental warming (increased by 1.3 degrees C) significantly stimulated the rates of R-s, R-h and R-r by 21.6, 23.8, and 21.1%, respectively. The annual cumulative C effluxes of R-s increased by 87.87 g m(-2) with nearly equal contributions from R-h (46.84 g m(-2)) and R-r (41.03 g m(-2)) under warming. Moreover, warming-induced increase in R-r mainly resulted from increased R-fr rather than R-z due to the significant increase in fine root biomass and R-fr rate. In addition, the Q(10) values for R-s, R-h and R-r were also increased by experimental warming, while the contribution of R-h to R-s was not altered by experimental warming. Collectively, our results suggest that future climatic warming will stimulate more C releases from soil to the atmosphere through an enhancement of both R-h and R-r in these alpine scrub ecosystems on the Qinghai-Tibet Plateau. (C) 2018 Elsevier B.V. All rights reserved.
学科主题	Environment ; Ecology
URL标识	查看原文
WOS关键词	SIBIRAEA-ANGUSTATA SCRUB ; BELOW-GROUND LITTER ; TERM N ADDITION ; ROOT RESPIRATION ; HETEROTROPHIC RESPIRATION ; CLIMATE-CHANGE ; TEMPERATURE SENSITIVITY ; AUTOTROPHIC RESPIRATION ; MICROBIAL BIOMASS ; CARBON FEEDBACK
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000444625900133
内容类型	期刊论文
源URL	[http://210.75.237.14/handle/351003/30620]
专题	生物多样性与生态系统服务领域_中国科学院山地生态恢复与生物资源利用重点实验室
作者单位	1.Chinese Acad Sci, Ecol Restorat Biodivers Conservat Key Lab Sichuan, Key Lab Mt Ecol Restorat & Bioresource Utilizat, Chengdu Inst Biol, Chengdu 610041, Sichuan, Peoples R China; 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Sichuan Univ, Coll Life Sci, Chengdu 610064, Sichuan, Peoples R China;
推荐引用方式 GB/T 7714	Ma, Zhiliang,Zhao, Wenqiang,Liu, Mei,et al. Responses of soil respiration and its components to experimental warming in an alpine scrub ecosystem on the eastern Qinghai-Tibet Plateau[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2018,643(2018):1427-1435.
APA	Ma, Zhiliang,Zhao, Wenqiang,Liu, Mei,&Liu, Qing.(2018).Responses of soil respiration and its components to experimental warming in an alpine scrub ecosystem on the eastern Qinghai-Tibet Plateau.SCIENCE OF THE TOTAL ENVIRONMENT,643(2018),1427-1435.
MLA	Ma, Zhiliang,et al."Responses of soil respiration and its components to experimental warming in an alpine scrub ecosystem on the eastern Qinghai-Tibet Plateau".SCIENCE OF THE TOTAL ENVIRONMENT 643.2018(2018):1427-1435.