干旱区生态环境知识资源中心(Arid): Soil carbon release responses to long-term versus short-term climatic warming in an arid ecosystem

Arid

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 1,2; Xu, Zhenzhu 1; Zhou, Guangsheng 1,3; Shi, Yaohui 1,3
通讯作者	Xu, Zhenzhu ; Zhou, Guangsheng
来源期刊	BIOGEOSCIENCES
ISSN	1726-4170
EISSN	1726-4189
出版年	2020
卷号	17 期号:3 页码:781-792
英文摘要	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.
类型	Article
语种	英语
国家	Peoples R China
开放获取类型	Green Submitted, gold
收录类别	SCI-E
WOS记录号	WOS:000515166900001
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类目	Ecology ; Geosciences, Multidisciplinary
WOS研究方向	Environmental Sciences & Ecology ; Geology
来源机构	中国科学院植物研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/314172
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]. 中国科学院植物研究所,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.