Delta(CO2)-C-14 from dark respiration in plants and its impact on the estimation of atmospheric fossil fuel CO2

doi:10.1016/j.jenvrad.2017.01.003

	Delta(CO2)-C-14 from dark respiration in plants and its impact on the estimation of atmospheric fossil fuel CO2
	Xiong, Xiaohu 1,2,3; Fu, Yunchong 2,3; Lu, Xuefeng 2,3; Du, Hua 2,3; Niu, Zhenchuan 2,3; Wu, Shugang 2,3; Cheng, Peng 2,3; Zhou, Weijian 2,3; Burr, George S.2,3
刊名	JOURNAL OF ENVIRONMENTAL RADIOACTIVITY
	2017-04-01
卷号	169 期号:2017 页码:79-84
关键词	Delta C-14 Plant Dark Respiration Fossil Fuel Co2 Carbon Cycle
DOI	10.1016/j.jenvrad.2017.01.003
文献子类	Article
英文摘要	Radiocarbon (C-14) has been widely used for quantification of fossil fuel CO2 (CO2ff) in the atmosphere and for ecosystem source partitioning studies. The strength of the technique lies in the intrinsic differences between the C-14 signature of fossil fuels and other sources. In past studies, the C-14 content of CO2 derived from plants has been equated with the C-14 content of the atmosphere. Carbon isotopic fractionation mechanisms vary among plants however, and experimental study on fractionation associated with dark respiration is lacking. Here we present accelerator mass spectrometry (AMS) radiocarbon results of CO2 respired from 21 plants using a lab-incubation method and associated bulk organic matter. From the respired CO2 we determine Delta C-14(res) values, and from the bulk organic matter we determine-Delta C-14(born) values. A significant difference between Delta C-14(res) and Delta C-14(bom) (P < 0.01) was observed for all investigated plants, ranging from -42.3 parts per thousand to 10.1 parts per thousand. The results show that Delta C-14(res) values are in agreement with mean atmospheric Delta(CO2)-C-14 for several days leading up to the sampling date, but are significantly different from corresponding bulk organic Delta C-14 values. We find that although dark respiration is unlikely to significantly influence the estimation of CO2ff, an additional bias associated with the respiration rate during a plant's growth period should be considered when using Delta C-14 in plants to quantify atmospheric CO2. (C) 2017 Elsevier Ltd. All rights reserved.
WOS关键词	CARBON-ISOTOPE COMPOSITION ; RADIOCARBON CONCENTRATION ; RESPIRED CO2 ; ANTHROPOGENIC CO2 ; SOUTHERN POLAND ; RESIDENCE TIMES ; TREE-RINGS ; SOIL CO2 ; C-14 ; FRACTIONATION
WOS研究方向	Environmental Sciences & Ecology
语种	英语
WOS记录号	WOS:000398752300010
内容类型	期刊论文
源URL	[http://ir.ieecas.cn/handle/361006/5489]
专题	地球环境研究所_加速器质谱中心
作者单位	1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China 3.Xian AMS Ctr, Xian 710061, Peoples R China
推荐引用方式 GB/T 7714	Xiong, Xiaohu,Fu, Yunchong,Lu, Xuefeng,et al. Delta(CO2)-C-14 from dark respiration in plants and its impact on the estimation of atmospheric fossil fuel CO2[J]. JOURNAL OF ENVIRONMENTAL RADIOACTIVITY,2017,169(2017):79-84.
APA	Xiong, Xiaohu.,Fu, Yunchong.,Lu, Xuefeng.,Du, Hua.,Niu, Zhenchuan.,...&Burr, George S..(2017).Delta(CO2)-C-14 from dark respiration in plants and its impact on the estimation of atmospheric fossil fuel CO2.JOURNAL OF ENVIRONMENTAL RADIOACTIVITY,169(2017),79-84.
MLA	Xiong, Xiaohu,et al."Delta(CO2)-C-14 from dark respiration in plants and its impact on the estimation of atmospheric fossil fuel CO2".JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 169.2017(2017):79-84.