Does short-term litter input manipulation affect soil respiration and its carbon-isotopic signature in a coniferous forest ecosystem of central China?

doi:10.1016/j.apsoil.2017.01.013

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	Does short-term litter input manipulation affect soil respiration and its carbon-isotopic signature in a coniferous forest ecosystem of central China?
	Wu, Junjun; Zhang, Qian; Yang, Fan; Lei, Yao; Zhang, Quanfa; Cheng, Xiaoli
刊名	APPLIED SOIL ECOLOGY
	2017-05-01
卷号	113 页码:45-53
关键词	Carbon isotope Litter inputs manipulation Microbial community structure Soil respiration Substrate availability
ISSN号	0929-1393
DOI	10.1016/j.apsoil.2017.01.013
英文摘要	Global Change greatly alters the quality and quantity of plant litter inputs to soils and further impacts soil respiration. However, it is not fully understood how soil respiration may change with future shifts in litter input. The Detritus Input and Removal Treatment (DIRT) experiment were conducted in a coniferous forest (Platycladus orientalis (Linn.) Franco) ecosystem of central China to investigate the impact of above and belowground litter input on soil respiration and the carbon-isotopic signature of soil-respired CO2. Short-term litter input manipulation significantly affected soil respiration. Based on annual flux values, soil respiration decreased by 31.9%, 20.5% and 37.2% in treatments with no litter (NL), no roots (NR) and no roots and no litter (NRNL), respectively, compared to the control (CK) treatment. Conversely, the double litter (DL) treatment increased soil respiration by 9.1% compared to the CK treatment. The recalcitrance index of carbon (RIC) and the relative abundance of fungi increased under NL, NR and NRNL treatment compared to the CK treatment. The carbon-isotopic signature of soil-respired CO2 was enriched under NRNL treatment and was slightly depleted under DL treatment compared to the CK treatment. The soil respiration rate and its carbon-isotopic signature exhibited similar seasonal patterns among treatments with higher soil respiration rates and lower delta C-13 values of soil-respired CO2 in the summer compared with other seasons. Basal soil respiration was positively related to labile C and microbial biomass and negatively related to RIC and the fungi-to-bacteria (F:B) ratio, whereas the delta C-13 value of soil-respired CO2 was negatively correlated with soil temperature and water content. Our results suggest that short-term litter input manipulation can affect soil respiration by altering substrate availability and microbial community structure and can impact the carbon-isotopic signature of soil-respired CO2 possibly due to changes in the components of soil respiration and soil microclimate. (C) 2017 Elsevier B.V. All rights reserved.
资助项目	National Natural Science Foundation of China[31470557] ; National Natural Science Foundation of China[31270550] ; National Natural Science Foundation of China[31130010] ; Strategic Priority Research Program B of the Chinese Academy of Sciences[XDB15010200]
WOS研究方向	Agriculture
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000399859200006
内容类型	期刊论文
源URL	[http://202.127.146.157/handle/2RYDP1HH/1379]
专题	中国科学院武汉植物园
通讯作者	Cheng, Xiaoli
作者单位	Chinese Acad Sci, Wuhan Bot Garden, Key Lab Aquat Bot & Watershed Ecol, Wuhan 430074, Peoples R China
推荐引用方式 GB/T 7714	Wu, Junjun,Zhang, Qian,Yang, Fan,et al. Does short-term litter input manipulation affect soil respiration and its carbon-isotopic signature in a coniferous forest ecosystem of central China?[J]. APPLIED SOIL ECOLOGY,2017,113:45-53.
APA	Wu, Junjun,Zhang, Qian,Yang, Fan,Lei, Yao,Zhang, Quanfa,&Cheng, Xiaoli.(2017).Does short-term litter input manipulation affect soil respiration and its carbon-isotopic signature in a coniferous forest ecosystem of central China?.APPLIED SOIL ECOLOGY,113,45-53.
MLA	Wu, Junjun,et al."Does short-term litter input manipulation affect soil respiration and its carbon-isotopic signature in a coniferous forest ecosystem of central China?".APPLIED SOIL ECOLOGY 113(2017):45-53.