Rare earth element geochemistry in soils along arid and semiarid grasslands in northern China | |
Cao, Yi-Wen2,3; Liu, Xiao-Ming4; Wang, Chao2; Bai, Edith1; Wu, Nanping5 | |
刊名 | ECOLOGICAL PROCESSES |
2022-03-21 | |
卷号 | 11期号:1页码:14 |
关键词 | Rare earth elements Soil Grassland Northern China Aridity index |
DOI | 10.1186/s13717-022-00375-z |
通讯作者 | Wu, Nanping |
英文摘要 | Background Rare earth elements (REE) are a group of trace elements that behave geochemically coherently. REE fractionation patterns normalized to reference materials provide a powerful tool for documenting pedogenesis. In-soil processes are particularly difficult to illustrate with respect to contemporary and past climate conditions. In this study, we characterize the rare earth element (REE) contents in bulk soils and respective geochemical fractions (e.g., exchangeable, carbonate-bound, reducible, and oxidizable fractions) and to decipher the relationships between REE geochemistry components and climatic factors across a large-scale northern China transect (NCT). Results Across the NCT, bulk REE concentrations ranged from 55.2 to 241.1 mu g g(-1) with a main portion in the residual fraction (49-79%), followed by oxidizable fraction (2-40%), reducible fraction (3-22%), carbonate-bound fraction (0.1-16%), and negligible exchangeable fraction. The REE contents of geochemical components (carbonate-bound, reducible, and oxidizable) in topsoils correlated to climate factors (mean annual precipitation, mean annual temperature, potential evaporation, and aridity index (AI)). The normalized abundances to the upper continental crust (UCC) composition show that the middle REE was generally enriched than the light REE and heavy REE in topsoils along the transect. The overall UCC-normalized bulk REE patterns in topsoils and subsoils were similar, characterized by weak negative Ce anomalies and positive Eu anomalies. Conclusions Our data in topsoils and depth profiles collectively suggest that cycling of REE was primarily regulated by abiotic processes in area with AI < 0.2, while the biological effect on REE circulation in soil played a more effective role in area with AI > 0.3. The similar UCC normalized patterns in topsoils suggest that the REE was originated from a common source with limited influences from other sources (e.g., atmospheric dusts and anthropogenic contributions). Our results to some extent provide evidence for climatic influence REE distribution patterns both in topsoils and subsoils across the continental-scale transect. Our investigation gives insights into future studies on vertical REE mobility and its associated biogeochemical pathways. |
资助项目 | Chinese Academy of Sciences[E01X0301] ; National Natural Science Foundation of China[41673005] ; China Scholarship Council ; Youth Innovation Promotion Association CAS[2018231] |
WOS关键词 | SEQUENTIAL EXTRACTION PROCEDURE ; MINE TAILINGS ; FRACTIONATION ; REE ; BEHAVIOR ; PLANT ; SEDIMENTS ; TRACE ; FE ; BIOAVAILABILITY |
WOS研究方向 | Environmental Sciences & Ecology |
语种 | 英语 |
出版者 | SPRINGER |
WOS记录号 | WOS:000771452100001 |
资助机构 | Chinese Academy of Sciences ; National Natural Science Foundation of China ; China Scholarship Council ; Youth Innovation Promotion Association CAS |
内容类型 | 期刊论文 |
版本 | 出版稿 |
源URL | [http://ir.idsse.ac.cn/handle/183446/9229] |
专题 | 深海科学研究部_深海地质与地球化学研究室 |
通讯作者 | Wu, Nanping |
作者单位 | 1.Northeast Normal Univ, Sch Geog Sci, Key Lab Geog Proc & Ecol Secur Changbai Mt, Changchun 130024, Peoples R China 2.Chinese Acad Sci, Inst Appl Ecol, CAS Key Lab Forest Ecol & Management, Shenyang 110016, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Univ N Carolina, Dept Earth Marine & Environm Sci, Chapel Hill, NC 27515 USA 5.Chinese Acad Sci, Inst Deep Sea Sci & Engn, Sanya 572000, Peoples R China |
推荐引用方式 GB/T 7714 | Cao, Yi-Wen,Liu, Xiao-Ming,Wang, Chao,et al. Rare earth element geochemistry in soils along arid and semiarid grasslands in northern China[J]. ECOLOGICAL PROCESSES,2022,11(1):14. |
APA | Cao, Yi-Wen,Liu, Xiao-Ming,Wang, Chao,Bai, Edith,&Wu, Nanping.(2022).Rare earth element geochemistry in soils along arid and semiarid grasslands in northern China.ECOLOGICAL PROCESSES,11(1),14. |
MLA | Cao, Yi-Wen,et al."Rare earth element geochemistry in soils along arid and semiarid grasslands in northern China".ECOLOGICAL PROCESSES 11.1(2022):14. |
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