Carbon dioxide concentration can limit the identification of C-4 plants by stable isotope composition

doi:10.1007/s12517-016-2621-5

	Carbon dioxide concentration can limit the identification of C-4 plants by stable isotope composition
	Zhang, Pu 2,3; Liu, Weiguo 2; Lu, Xue 3,4; Ma, Junjie 3; Wu, Jiangli 1,3
刊名	ARABIAN JOURNAL OF GEOSCIENCES
	2016-08-01
卷号	9 期号:12
关键词	Carbon Isotope C-4 And C-3 Plants High Co2 Concentration Environmental Implications Of The Emergence And Expansion Of C-4 Plants
DOI	10.1007/s12517-016-2621-5
文献子类	Article
英文摘要	The global expansion of C-4 plants during the Late Cenozoic is an important event in the Earth's environmental-ecosystem evolution. Taking into account the nonglobal expansion of C-4 plants, the CO2 concentration is not the only prerequisite for C-4 expansion. The direct driving factors for C-4 expansion may be associated with regional arid and/or warm seasonal precipitation and temperature variations. However, a large change in the CO2 concentration occurred, varying from 100 similar to 300 to > 2000 ppm during geological history; thus, it is necessary to understand the impact of such changes in the atmospheric CO2 concentration on the delta C-13 values of C-3 and C-4 plants during different geological periods. In this article, we analyzed the delta C-13 values for seven C-4 and C-3 plants grown under different CO2 concentrations for 10, 20, and 30 days. According to our study, the delta C-13 records for all the C-3 and C-4 plants show a rapid decrease followed by a slowly stable decreased trend with increasing CO2 concentration when the plants were grown for 10, 20, and 30 days. Comparing with the value averaging about -26 to -27 parts per thousand for C-3 plants and about -12 parts per thousand for C-4 plants, when the CO2 levels reach 20,000 ppm, all of the delta C-13 values of C-4 plants become more negative, varying from -27.5 to -36.1 parts per thousand, which fall into the range of delta C-13 values for C-3 plants. Namely, the increase of carbon dioxide can limit the identification of C-4 plants by carbon isotope composition. Thus, the expansion of C-4 plants as reconstructed from the geological records of carbon isotopes possibly does not reflect the origin and expansion of C-4 plants when atmospheric CO2 concentration was reduced to a threshold value, as previously thought. However, another possible explanation is that the atmospheric CO2 concentration was reduced to a threshold value from which the carbon isotope values of C-3 and C-4 plants can be distinguished. Therefore, we suggest that it is necessary to understand the delta C-13 range for C-3 and C-4 plants, to accurately evaluate the origin and expansion of C-4 plants, for geological periods when a high CO2 concentration occurred.
WOS关键词	CHINESE LOESS PLATEAU ; ATMOSPHERIC CO2 CONCENTRATION ; LATE MIOCENE ; NORTHERN PAKISTAN ; GREAT-PLAINS ; EXPANSION ; CLIMATE ; VEGETATION ; PALEOSOLS ; MONSOON
WOS研究方向	Geology
语种	英语
WOS记录号	WOS:000381983600014
内容类型	期刊论文
源URL	[http://ir.ieecas.cn/handle/361006/5685]
专题	地球环境研究所_加速器质谱中心
作者单位	1.China Geol Survey, Xian Ctr, Xian 710054, Peoples R China 2.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710075, Peoples R China 3.Northwest Univ, Coll Urban & Environm Sci, Xian 710127, Peoples R China 4.Yulin Univ, Coll Life Sci, Yulin 719000, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Pu,Liu, Weiguo,Lu, Xue,et al. Carbon dioxide concentration can limit the identification of C-4 plants by stable isotope composition[J]. ARABIAN JOURNAL OF GEOSCIENCES,2016,9(12).
APA	Zhang, Pu,Liu, Weiguo,Lu, Xue,Ma, Junjie,&Wu, Jiangli.(2016).Carbon dioxide concentration can limit the identification of C-4 plants by stable isotope composition.ARABIAN JOURNAL OF GEOSCIENCES,9(12).
MLA	Zhang, Pu,et al."Carbon dioxide concentration can limit the identification of C-4 plants by stable isotope composition".ARABIAN JOURNAL OF GEOSCIENCES 9.12(2016).