气候变化领域集成服务门户(CCPortal): Different responses of soil respiration and its components to experimental warming with contrasting soil water content

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DOI	10.1657/AAAR0014-018
	Different responses of soil respiration and its components to experimental warming with contrasting soil water content
	Peng Fei; Xu Manhou; You Quangang; Zhou Xuhui; Wang Tao; Xue Xian
发表日期	2015
ISSN	1523-0430
EISSN	1938-4246
卷号	47 期号:2
英文摘要	Soil water content (SWC) regulation on the responses of soil respiration (R-s), autotrophic respiration (R-a), and heterotrophic respiration (R-h) to warming are rarely investigated in alpine meadow ecosystem in the Qinghai-Tibet Plateau (QTP). We conducted a warming experiment to investigate how SWC regulates the responses of R-s and its components (R-a and R-h) to warming. Infrared heaters were used to simulate climatic warming. Soil respiration was measured inside surface collars (2-3 cm deep) and R-h was measured inside deep collars (50 cm deep), which excludes root respiration. Autotrophic respiration was calculated by subtracting R-h from R-s. Warming increased the average R-s and R-h by 9.9% and 12.7% but had no significant effect on R-a. Interaction between warming and SWC had significant effect on R-s and its components. Soil respiration and R-a decreased by 5.8% and 36.3% in dry conditions, but they increased by 23.5% and 47.7% in wet conditions. Growing season above-ground biomass was enhanced by 0.1 kg m(-2) in wet conditions but reduced by 0.10 kg m(-2) in dry conditions under warming manipulation. The estimated net ecosystem carbon (C) balance was 0.65 and -0.16 kg m(-2) in wet and dry conditions, respectively, which indicates a net C emission of alpine meadow in wet but a net C sequestration in dry conditions. Our results emphasize the importance of incorporating SWC in simulation of ecosystem carbon balance under a warming climate.
学科领域	Environmental Sciences & Ecology; Physical Geography
语种	英语
WOS研究方向	Environmental Sciences ; Geography, Physical
来源期刊	ARCTIC ANTARCTIC AND ALPINE RESEARCH
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/111786
作者单位	Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Key Lab Desert & Desertificat, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Peng Fei,Xu Manhou,You Quangang,et al. Different responses of soil respiration and its components to experimental warming with contrasting soil water content[J]. 中国科学院西北生态环境资源研究院,2015,47(2).
APA	Peng Fei,Xu Manhou,You Quangang,Zhou Xuhui,Wang Tao,&Xue Xian.(2015).Different responses of soil respiration and its components to experimental warming with contrasting soil water content.ARCTIC ANTARCTIC AND ALPINE RESEARCH,47(2).
MLA	Peng Fei,et al."Different responses of soil respiration and its components to experimental warming with contrasting soil water content".ARCTIC ANTARCTIC AND ALPINE RESEARCH 47.2(2015).