干旱区生态环境知识资源中心(Arid): Seasonal variations in the response of soil CO2 efflux to precipitation pulse under mild drought in a temperate oak (Quercus variabilis) forest

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DOI	10.1016/j.agrformet.2019.03.009
	Seasonal variations in the response of soil CO2 efflux to precipitation pulse under mild drought in a temperate oak (Quercus variabilis) forest
	Liu, Yanchun 1; Liu, Shirong 2; Miao, Renhui 1; Liu, Yinzhan 1; Wang, Dong 1; Zhao, Cancan 1
通讯作者	Zhao, Cancan
来源期刊	AGRICULTURAL AND FOREST METEOROLOGY
ISSN	0168-1923
EISSN	1873-2240
出版年	2019
卷号	271 页码:240-250
英文摘要	Extreme precipitation events are predicted to increase in intensity and duration, with uncertain implications for terrestrial carbon (C) cycling. However, knowledge on the responses of soil CO2 efflux to precipitation pulses in different seasons remains limited. Here we assessed the impacts of episodic precipitation pulses on soil respiration (SR) and its components [heterotrophic respiration (HR) and autotrophic respiration (AR)] under mild drought in different seasons in a temperate oak forest, Central China. Results showed that SR (24 h) increased with elevated precipitation levels, and the estimated precipitation-induced increases in the total amount of SR (3 months) in summer (17.86 g C m(-2)) and autumn (13.57 g C m(-2)) were greater than that in spring (9.73 g C m(-2)) and winter (3.71 g C m(-2)). Effects of precipitation pulse on HR and AR (24 h) varied with seasons, showing significant positive effects on HR in winter and AR in summer. Precipitation events significantly reduced the proportion of HR in SR in summer and autumn, but not in winter. Across all treatments, post-precipitation soil temperature, pre-precipitation soil moisture, and soil inorganic nitrogen are primarily responsible for the precipitation-induced increases in SR, whereas the stimulated HR after precipitation is largely depended on soil total porosity, pre-precipitation soil moisture, and microbial biomass C. Our study suggests that sporadic precipitation events have differential influences on SR and its components in different seasons. Our findings also emphasize that the importance of incorporating episodic extreme precipitation events and its influence on soil CO2 efflux into the future predictions of forest C cycling under climate change.
英文关键词	Soil respiration Rainfall event Heterotrophic respiration Carbon cycling Drought intensity Birch effect
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000468709200023
WOS关键词	EXPERIMENTAL THROUGHFALL REDUCTION ; SONORAN DESERT ; EXTREME PRECIPITATION ; MICROBIAL BIOMASS ; PINE FOREST ; RESPIRATION ; DECOMPOSITION ; PLANTATION ; ECOSYSTEMS ; LITTER
WOS类目	Agronomy ; Forestry ; Meteorology & Atmospheric Sciences
WOS研究方向	Agriculture ; Forestry ; Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/213954
作者单位	1.Henan Univ, Sch Life Sci, State Key Lab Cotton Biol, Kaifeng 475004, Henan, Peoples R China; 2.Chinese Acad Forestry, Res Inst Forest Ecol Environm & Protect, Key Lab Forest Ecol & Environm, Chinas State Forestry Adm, Beijing 100091, Peoples R China
推荐引用方式 GB/T 7714	Liu, Yanchun,Liu, Shirong,Miao, Renhui,et al. Seasonal variations in the response of soil CO2 efflux to precipitation pulse under mild drought in a temperate oak (Quercus variabilis) forest[J],2019,271:240-250.
APA	Liu, Yanchun,Liu, Shirong,Miao, Renhui,Liu, Yinzhan,Wang, Dong,&Zhao, Cancan.(2019).Seasonal variations in the response of soil CO2 efflux to precipitation pulse under mild drought in a temperate oak (Quercus variabilis) forest.AGRICULTURAL AND FOREST METEOROLOGY,271,240-250.
MLA	Liu, Yanchun,et al."Seasonal variations in the response of soil CO2 efflux to precipitation pulse under mild drought in a temperate oak (Quercus variabilis) forest".AGRICULTURAL AND FOREST METEOROLOGY 271(2019):240-250.