Climatic warming enhances soil respiration resilience in an arid ecosystem

doi:10.1016/j.scitotenv.2020.144005

	Climatic warming enhances soil respiration resilience in an arid ecosystem
	Yu, Hongying ; Liu, Xiaodi 1,2; Ma, Quanhui 1,2; Yin, Zuotian 1,2; Wang, Yuhui 1; Xu, Zhenzhu1 ; Zhou, Guangsheng
	2021
发表期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
卷号	756
摘要	Precipitation plays a vital role in maintaining desert ecosystems in which rain events after drought cause soil respiration (R-s) pulses. However, this process and its underlying mechanism remain ambiguous, particularly under climatic warming conditions. This study aims to determine the magnitude and drivers of R-s resilience to rewetting. We conducted a warming experiment in situ in a desert steppe with three climatic warming scenarios-ambient temperature as the control, long-term and moderate warming treatment, and short-term and acute warming treatment. Our findings showed that the average R-s over the measurement period in the control, moderate and acute warming plots were 0.51, 0.30 and 0.30 mu mol . CO2 . m(-2) . s(-1), respectively, and significantly increased to 1.72, 1.41 and 1.72 mu mol . CO2 . m(-2) . s(-1), respectively, after rewetting. Both microbial and root respiration substantially increased by rewetting: microbial respiration contributed more than root respiration to total R-s. The R-s significantly increased with microbial biomass carbon and soil organic carbon (SOC) contents. The R-s increase by rewetting might be due to the greater microbial respiration relying heavily on microbial biomass and the larger amount of available SOC after rewetting. A trackable pattern of R-s resilience changes occurred during the daytime. The resilience of R-s in acute warming plots was significantly higher than those in both moderate warming and no warming plots, indicating that R-s resilience might be enhanced with drought severity induced by climatic warming. These results suggest that climatic warming treatment would enhance the drought resilience of soil carbon effluxes following rewatering in arid ecosystems, consequently accelerating the positive feedback of climate change. Therefore, this information should be included in carbon cycle models to accurately assess ecosystem carbon budgets with future climate change scenarios in terrestrial ecosystems, particularly in arid areas. (C) 2020 Elsevier B.V. All rights reserved.
关键词	Soil respiration Resilience Drought Rewetting Climatic warming Desert steppe
学科领域	Environmental Sciences
DOI	10.1016/j.scitotenv.2020.144005
收录类别	SCI
语种	英语
WOS关键词	PRECIPITATION PULSES ; INFRARED HEATER ; DESERT STEPPE ; HETEROTROPHIC RESPIRATION ; TEMPERATURE SENSITIVITY ; MICROBIAL COMMUNITIES ; GRASSLAND ; RESPONSES ; CO2 ; INCREASES
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000603487500095
出版者	ELSEVIER
文献子类	Article
出版地	AMSTERDAM
EISSN	1879-1026
资助机构	National Natural Science Foundation of China [41775108, 31661143028] ; China Special Fund for Meteorological Research in the Public Interest (Major projects) [GYHY201506001-3]
作者邮箱	yhwang@ibcas.ac.cn ; xuzz@ibcas.ac.cn ; zhougs@cma.gov.cn
引用统计	被引频次：10[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/26814
专题	植被与环境变化国家重点实验室
作者单位	1.Chinese Acad Meteorol Sci, State Key Lab Severe Weather, Beijing 100081, Peoples R China 2.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Yu, Hongying,Liu, Xiaodi,Ma, Quanhui,et al. Climatic warming enhances soil respiration resilience in an arid ecosystem[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2021,756.
APA	Yu, Hongying.,Liu, Xiaodi.,Ma, Quanhui.,Yin, Zuotian.,Wang, Yuhui.,...&Zhou, Guangsheng.(2021).Climatic warming enhances soil respiration resilience in an arid ecosystem.SCIENCE OF THE TOTAL ENVIRONMENT,756.
MLA	Yu, Hongying,et al."Climatic warming enhances soil respiration resilience in an arid ecosystem".SCIENCE OF THE TOTAL ENVIRONMENT 756(2021).

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