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
文献类型：期刊论文
| 作者 | Yao, Yuan2,3; Zhao, Jiaju3; Longo, William M.2; Li, Gaoyuan1; Wang, Xian2; Vachula, Richard S.2; Wang, Karen J.2; Huang, Yongsong2,3 |
| 刊名 | EARTH AND PLANETARY SCIENCE LETTERS
 |
| 出版日期 | 2019-12-01 |
| 卷号 | 527页码:11 |
| 关键词 | alkenones Group I Isochrysidales DNA winter temperature proxy volcanic lakes |
| ISSN号 | 0012-821X |
| DOI | 10.1016/j.epsl.2019.115792 |
| 通讯作者 | Huang, Yongsong(yongsong_huang@brown.edu) |
| 英文摘要 | The 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. |
| WOS关键词 | LONG-CHAIN-ALKENONES ; TEMPERATURE ; DISTRIBUTIONS ; ICE ; PALEOTEMPERATURE ; ALKENOATES ; SEDIMENTS ; LACUSTRINE ; CLIMATE ; CALIBRATION |
| 资助项目 | National 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研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000491609700016 |
| 出版者 | ELSEVIER |
| 资助机构 | National 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 |
| 源URL | [http://ir.ieecas.cn/handle/361006/12933]  |
| 专题 | 地球环境研究所_古环境研究室 |
| 通讯作者 | Huang, Yongsong |
| 作者单位 | 1.China Univ Geosci, State Key Lab Biogeol & Environm Geol, Beijing 100083, Peoples R China 2.Brown Univ, Dept Earth Environm & Planetary Sci, Providence, RI 02912 USA 3.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Shaanxi, Peoples R China |
| 推荐引用方式 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. |
入库方式： OAI收割
来源：地球环境研究所
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