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New insights into environmental controls on the occurrence and abundance of Group I alkenones and their paleoclimate applications: Evidence from volcanic lakes of northeastern China
Yao, Yuan1,2; Zhao, Jiaju1; Longo, William M.2; Li, Gaoyuan3; Wang, Xian2; Vachula, Richard S.2; Wang, Karen J.2; Huang, Yongsong1,2
Corresponding AuthorHuang, Yongsong(yongsong_huang@brown.edu)
2019-12-01
Source PublicationEARTH AND PLANETARY SCIENCE LETTERS
ISSN0012-821X
Volume527Pages:11
AbstractThe distinctive long-chain alkenones (LCAs) produced by Group I Isochrysidales from freshwater and oligohaline lakes have great potential for quantitative paleotemperature reconstructions. The widespread application of sedimentary Group I LCAs, however, is hampered by an incomplete understanding of the environmental controls on the occurrence of Group I LCAs in freshwater lakes. The correspondence between Group I LCA concentrations and pH (6.2-8.5) in northern Alaskan freshwater lakes (Longo et al., 2016) suggests that Group I Isochrysidales may preferentially thrive in freshwater lakes with high pH. Here, we systematically study LCA distributions, haptophyte-specific 18S rDNA sequences, and concentrations of major ions and trace elements in 18 freshwater volcanic lakes in northeastern China with an extended pH range from 7.17 to 9.99. We find that 11 of the 18 lakes examined contain Group I LCAs and the corresponding DNA sequences of their producers. Our DNA results indicate that the dominant alkenone producer in all 11 lakes is closely related to the Group I Greenland OTU 5 genotype, with the exception of two anthropogenically impacted lakes where small numbers of Group II sequences are found. Statistical analyses indicate that the highest concentrations of Group I LCAs are found in oligotrophic freshwater lakes with pH ranging from similar to 7.3 to 8.8. We find that elevated concentrations of certain trace elements may lead to the disappearance of Group I LCAs despite lake water falling within the optimal pH range. Together with previously published Group I LCA data from the temperature calibration in Northern Hemisphere freshwater lakes (Longo et al., 2018), we find, for the first time, that Group I R3b (R3b = C-37:3b/(C38:3bEt + C-37:3b)) values are most sensitive to winter temperature changes when mean winter temperature is higher than similar to-20 degrees. Our results suggest that the freshwater volcanic lakes in northeastern China are highly valuable targets for paleotemperature reconstructions using Group I LCAs. (C) 2019 Elsevier B.V. All rights reserved.
Keywordalkenones Group I Isochrysidales DNA winter temperature proxy volcanic lakes
DOI10.1016/j.epsl.2019.115792
WOS KeywordLONG-CHAIN-ALKENONES ; TEMPERATURE ; DISTRIBUTIONS ; ICE ; PALEOTEMPERATURE ; ALKENOATES ; SEDIMENTS ; LACUSTRINE ; CLIMATE ; CALIBRATION
Indexed BySCI ; SCI
Language英语
Funding ProjectNational Natural Science Foundation of China[41573113] ; National Natural Science Foundation of China[41702187] ; National Natural Science Foundation of China[41602193] ; State Key Laboratory of Loess and Quaternary Geology in the Institute of Earth Environment, Chinese Academy of Sciences[SKLLQGPY1704] ; U.S. National Science Foundation[EAR-1122749] ; U.S. National Science Foundation[PLR-1503846] ; U.S. National Science Foundation[EAR-1502455] ; U.S. National Science Foundation[EAR-1762431]
WOS Research AreaGeochemistry & Geophysics
Funding OrganizationNational Natural Science Foundation of China ; State Key Laboratory of Loess and Quaternary Geology in the Institute of Earth Environment, Chinese Academy of Sciences ; U.S. National Science Foundation
WOS SubjectGeochemistry & Geophysics
WOS IDWOS:000491609700016
PublisherELSEVIER
Citation statistics
Cited Times:11[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/12934
Collection古环境研究室
Corresponding AuthorHuang, Yongsong
Affiliation1.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Shaanxi, Peoples R China
2.Brown Univ, Dept Earth Environm & Planetary Sci, Providence, RI 02912 USA
3.China Univ Geosci, State Key Lab Biogeol & Environm Geol, Beijing 100083, Peoples R China
Recommended Citation
GB/T 7714
Yao, Yuan,Zhao, Jiaju,Longo, William M.,et al. New insights into environmental controls on the occurrence and abundance of Group I alkenones and their paleoclimate applications: Evidence from volcanic lakes of northeastern China[J]. EARTH AND PLANETARY SCIENCE LETTERS,2019,527:11.
APA Yao, Yuan.,Zhao, Jiaju.,Longo, William M..,Li, Gaoyuan.,Wang, Xian.,...&Huang, Yongsong.(2019).New insights into environmental controls on the occurrence and abundance of Group I alkenones and their paleoclimate applications: Evidence from volcanic lakes of northeastern China.EARTH AND PLANETARY SCIENCE LETTERS,527,11.
MLA Yao, Yuan,et al."New insights into environmental controls on the occurrence and abundance of Group I alkenones and their paleoclimate applications: Evidence from volcanic lakes of northeastern China".EARTH AND PLANETARY SCIENCE LETTERS 527(2019):11.
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