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Seasonality of C4 plant growth and carbonate precipitation in the Chinese Loess Plateau may cause positive carbon isotope anomalies in pedogenic carbonates

文献类型：期刊论文

作者Fu, Yang2,4; Guo, Zhengtang1,2,4; Wang, Guoan3
刊名QUATERNARY RESEARCH
出版日期2023-12-12
页码12
ISSN号0033-5894
关键词Carbon isotope Pedogenic carbonate Soil organic matter the Chinese Loess Plateau Seasonality C-4 plants
DOI10.1017/qua.2023.66
英文摘要Carbon isotope analysis of pedogenic carbonate (delta C-13(Carb)) and soil organic matter (delta C-13(TOC)) is widely applied in reconstructions of terrestrial paleovegetation. The delta C-13 of different archives is considered well matched and equally reflects the proportion of C-3/C-4 plant biomass covering the soil profile. However, modern soil and paleosol sequences provide substantial evidence that delta C-13(Carb) and delta C-13(TOC) do not always match, raising doubts about the accuracy of quantitative C-4 plant reconstructions. Here we report paired delta C-13 records of pedogenic carbonates and organic matter occluded within carbonate nodules from the Shaozhai section in the central Chinese Loess Plateau (CLP). The delta C-13(Carb) record exhibits a positive anomaly and exceeds the theoretical fractionation range with the coexisting delta C-13(TOC) record during the expansion of C4 plants. The possibility of contamination by detrital carbonates and atmospheric CO2 affecting delta C-13(Carb) was ruled out based on the morphological features, mineral fractions, and geochemical composition of carbonate nodules. Our study suggests that the enhanced respiration of C-4 plants during pedogenic carbonate precipitation may have caused positive shifts in delta C-13(Carb) records, supporting the hypothesis that the discrepancy in carbon sources explains the delta C-13(Carb) positive anomaly. Thus, the delta C-13(Carb) could reflect the maximum relative abundance of C-4 plants during their metabolic peaks.
WOS关键词ASIAN SUMMER MONSOON ; LAST GLACIAL MAXIMUM ; SOIL CARBONATE ; STABLE CARBON ; LATE MIOCENE ; NORTHERN CHINA ; ORGANIC-MATTER ; CLIMATE-CHANGE ; CO2 RECORD ; EAST-ASIA
资助项目National Natural Science Foundation of China[41888101] ; National Natural Science Foundation of China[41430531]
WOS研究方向Physical Geography ; Geology
语种英语
出版者CAMBRIDGE UNIV PRESS
WOS记录号WOS:001123994300001
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
源URL[http://ir.iggcas.ac.cn/handle/132A11/111705]  
专题地质与地球物理研究所_中国科学院新生代地质与环境重点实验室
通讯作者Guo, Zhengtang
作者单位1.CAS Ctr Excellence Life & Paleoenvironment, Beijing 100044, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.China Agr Univ, Coll Resources & Environm Sci, Beijing Key Lab Farmland Soil Pollut Prevent contr, Beijing 100193, Peoples R China
4.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Cenozo Geol & Environm, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Fu, Yang,Guo, Zhengtang,Wang, Guoan. Seasonality of C4 plant growth and carbonate precipitation in the Chinese Loess Plateau may cause positive carbon isotope anomalies in pedogenic carbonates[J]. QUATERNARY RESEARCH,2023:12.
APA Fu, Yang,Guo, Zhengtang,&Wang, Guoan.(2023).Seasonality of C4 plant growth and carbonate precipitation in the Chinese Loess Plateau may cause positive carbon isotope anomalies in pedogenic carbonates.QUATERNARY RESEARCH,12.
MLA Fu, Yang,et al."Seasonality of C4 plant growth and carbonate precipitation in the Chinese Loess Plateau may cause positive carbon isotope anomalies in pedogenic carbonates".QUATERNARY RESEARCH (2023):12.

入库方式： OAI收割

来源：地质与地球物理研究所

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