Comparing soil carbon loss through respiration and leaching under extreme precipitation events in arid and semiarid grasslands

doi:10.5194/bg-15-1627-2018

CORC > 植物研究所 > 中国科学院植物研究所 > 植被与环境变化国家重点实验室

	Comparing soil carbon loss through respiration and leaching under extreme precipitation events in arid and semiarid grasslands
	Liu, Ting ; Wang, Liang ; Feng, Xiaojuan 2; Zhang, Jinbo 3; Ma, Tian 2; Wang, Xin 2; Liu, Zongguang
刊名	BIOGEOSCIENCES
	2018
卷号	15 期号:5 页码:1627-1641
ISSN号	1726-4170
DOI	10.5194/bg-15-1627-2018
文献子类	Article
英文摘要	Respiration and leaching are two main processes responsible for soil carbon loss. While the former has received considerable research attention, studies examining leaching processes are limited, especially in semiarid grass-lands due to low precipitation. Climate change may increase the extreme precipitation event (EPE) frequency in arid and semiarid regions, potentially enhancing soil carbon loss through leaching and respiration. Here we incubated soil columns of three typical grassland soils from Inner Mongolia and the Qinghai-Tibetan Plateau and examined the effect of simulated EPEs on soil carbon loss through respiration and leaching. EPEs induced a transient increase in CO2 release through soil respiration, equivalent to 32 and 72% of the net ecosystem productivity (NEP) in the temperate grass-lands (Xilinhot and Keqi) and 7% of NEP in the alpine grass-lands (Gangcha). By comparison, leaching loss of soil carbon accounted for 290, 120, and 15% of NEP at the corresponding sites, respectively, with dissolved inorganic carbon (DIC, biogenic DIC C lithogenic DIC) as the main form of carbon loss in the alkaline soils. Moreover, DIC loss increased with recurring EPEs in the soil with the highest pH due to an elevated contribution of dissolved CO2 from organic carbon degradation (indicated by DIC-delta C-13). These results highlight the fact that leaching loss of soil carbon (particularly in the form of DIC) is important in the regional carbon budget of arid and semiarid grasslands and also imply that SOC mineralization in alkaline soils might be underestimated if only measured as CO2 emission from soils into the atmosphere. With a projected increase in EPEs under climate change, soil carbon leaching processes and the influencing factors warrant a better understanding and should be incorporated into soil carbon models when estimating carbon balance in grassland ecosystems.
学科主题	Ecology ; Geosciences, Multidisciplinary
电子版国际标准刊号	1726-4189
出版地	GOTTINGEN
WOS关键词	DISSOLVED ORGANIC-CARBON ; INORGANIC CARBON ; ISOTOPE FRACTIONATION ; RAINFALL VARIABILITY ; TEMPORAL VARIATION ; CLIMATE EXTREMES ; NORWAY SPRUCE ; DIOXIDE FLUX ; NITROGEN ; MATTER
语种	英语
出版者	COPERNICUS GESELLSCHAFT MBH
WOS记录号	WOS:000427717900002
资助机构	Chinese National Key Development Program for Basic Research [2015CB954201, 2017YFC0503902] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [41422304, 31370491, 41603076] ; International Partnership Program of Chinese Academy of Sciences [151111KYSB20160014] ; National Thousand Young Talents recruiting plan of China
内容类型	期刊论文
源URL	[http://ir.ibcas.ac.cn/handle/2S10CLM1/20656]
专题	植被与环境变化国家重点实验室
作者单位	1.Nanjing Normal Univ, Sch Geog Sci, Nanjing 210023, Jiangsu, 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, Peoples R China
推荐引用方式 GB/T 7714	Liu, Ting,Wang, Liang,Feng, Xiaojuan,et al. Comparing soil carbon loss through respiration and leaching under extreme precipitation events in arid and semiarid grasslands[J]. BIOGEOSCIENCES,2018,15(5):1627-1641.
APA	Liu, Ting.,Wang, Liang.,Feng, Xiaojuan.,Zhang, Jinbo.,Ma, Tian.,...&Liu, Zongguang.(2018).Comparing soil carbon loss through respiration and leaching under extreme precipitation events in arid and semiarid grasslands.BIOGEOSCIENCES,15(5),1627-1641.
MLA	Liu, Ting,et al."Comparing soil carbon loss through respiration and leaching under extreme precipitation events in arid and semiarid grasslands".BIOGEOSCIENCES 15.5(2018):1627-1641.