Soil carbon release responses to long-term versus short-term climatic warming in an arid ecosystem

doi:10.5194/bg-17-781-2020

	Soil carbon release responses to long-term versus short-term climatic warming in an arid ecosystem
	Yu, Hongying 1; Xu, Zhenzhu; Zhou, Guangsheng 2; Shi, Yaohui 2
	2020
发表期刊	BIOGEOSCIENCES
ISSN	1726-4170
卷号	17 期号:3 页码:781-792
摘要	Climate change severely impacts the grassland carbon cycling by altering rates of litter decomposition and soil respiration (R-s), especially in arid areas. However, little is known about the R-s responses to different warming magnitudes and watering pulses in situ in desert steppes. To examine their effects on Rs, we conducted long-term moderate warming (4 years, similar to 3 degrees C), short-term acute warming (1 year, similar to 4 degrees C) and watering field experiments in a desert grassland of northern China. While experimental warming significantly reduced average R-s by 32.5% and 40.8% under long-term moderate and short-term acute warming regimes, respectively, watering pulses (fully irrigating the soil to field capacity) stimulated it substantially. This indicates that climatic warming constrains soil carbon release, which is controlled mainly by decreased soil moisture, consequently influencing soil carbon dynamics. Warming did not change the exponential relationship between Rs and soil temperature, whereas the relationship between Rs and soil moisture was better fitted to a sigmoid function. The belowground biomass, soil nutrition, and microbial biomass were not significantly affected by either long-term or short-term warming regimes, respectively. The results of this study highlight the great dependence of soil carbon emission on warming regimes of different durations and the important role of precipitation pulses during the growing season in assessing the terrestrial ecosystem carbon balance and cycle.
学科领域	Ecology ; Geosciences, Multidisciplinary
DOI	10.5194/bg-17-781-2020
收录类别	SCI
语种	英语
WOS关键词	FLOOR CO2 FLUXES ; TEMPERATURE SENSITIVITY ; PRECIPITATION PULSES ; MICROBIAL COMMUNITY ; ELEVATED CO2 ; HETEROTROPHIC RESPIRATION ; DESERT STEPPE ; NITROGEN ADDITION ; TALLGRASS PRAIRIE ; GROWING-SEASON
WOS研究方向	Environmental Sciences & Ecology ; Geology
WOS记录号	WOS:000515166900001
出版者	COPERNICUS GESELLSCHAFT MBH
文献子类	Article
出版地	GOTTINGEN
EISSN	1726-4189
资助机构	National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31661143028, 41775108] ; China Special Fund for Meteorological Scientific Research in the Public Interest (Major projects) [GYHY201506001-3]
作者邮箱	xuzz@ibcas.ac.cn ; zhougs@cma.gov.cn
作品OA属性	gold, Green Submitted
引用统计	被引频次：9[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/2S10CLM1/21896
专题	植被与环境变化国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.China Meteorol Adm, Chinese Acad Meteorol Sci, Beijing 100081, Peoples R China
推荐引用方式 GB/T 7714	Yu, Hongying,Xu, Zhenzhu,Zhou, Guangsheng,et al. Soil carbon release responses to long-term versus short-term climatic warming in an arid ecosystem[J]. BIOGEOSCIENCES,2020,17(3):781-792.
APA	Yu, Hongying,Xu, Zhenzhu,Zhou, Guangsheng,&Shi, Yaohui.(2020).Soil carbon release responses to long-term versus short-term climatic warming in an arid ecosystem.BIOGEOSCIENCES,17(3),781-792.
MLA	Yu, Hongying,et al."Soil carbon release responses to long-term versus short-term climatic warming in an arid ecosystem".BIOGEOSCIENCES 17.3(2020):781-792.

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