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Water depth affecting thaumarchaeol production in Lake Qinghai, northeastern Qinghai-Tibetan plateau: Implications for paleo lake levels and paleoclimate
Wang, HY (Wang, Huanye)[ 1,2,3,4 ]; Dong, HL (Dong, Hailiang)[ 5,6 ]; Zhang, CLL (Zhang, Chuanlun L.)[ 2,7 ]; Jiang, HC (Jiang, Hongchen)[ 5 ]; Zhao, MX (Zhao, Meixun)[ 8 ]; Liu, ZH (Liu, Zhonghui)[ 9 ]; Lai, ZP (Lai, Zhongping)[ 3 ]; Liu, WG (Liu, Weiguo)[ 1 ]
2014-03-12
Source PublicationCHEMICAL GEOLOGY
Volume368Pages:76-84
Subtype期刊论文
Abstract

Archaeal glycerol dialkyl glycerol tetraethers (GDGTs) are increasingly popular and versatile tool for palaeolimnology studies, but their applications in paleohydrology are scarce, especially for thaumarchaeol which is specific for the newly proposed phylum Thaumarchaeota. After investigating our published GDGT data of Lake Qinghai, we found that both the concentration of thaumarchaeol and the relative abundance of thaumarchaeol to total archaeal GDGTs (%thaum) in core-top sediments increased significantly with increasing water depth (R=0.88 and 0.95, respectively), with lower concentrations of 5+/-5 ng/g in shallow areas (water depth<5m) and higher concentrations of 121+/-65ng/g in deep areas (water depth>10m). This is likely because that the producers of thaumarchaeol, Thaumarchaeota, prefer living in the relative deeper zone in lacustrine systems, where probably both competition of ammonium (the substrate) from other microbes and light intensity are low. Therefore, we proposed that thaumarchaeol was mainly produced in situ and changes in % thaum might reflect water-depth variations in this closed-basin lake. The application of % thaum as a water-depth indicator in a Holocene sediment sequence of core QH-2011 provided a high-resolution relative lake-level history of Lake Qinghai which resembles that inferred from the delta C-13(org) value obtained in the same core. This supports the use of %thaumas an indicator of lakewater depth in paleohydrology studies, especially for medium lakes. Moreover, the records of the two independent proxies in core QH-2011 confirmed a shallow Lake Qinghai in the early Holocene and a late-Holocene highstand, highlighting the importance of local temperature (and evaporation loss) in controlling effective moisture in the arid/semi-arid region.

KeywordThaumarchaeol Δ13c Org Lake Level Paleohydrology Lake Qinghai Qinghai–tibetan Plateau
DOI10.1016/j.chemgeo.2014.01.009
Indexed BySCI
Language英语
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/9799
Collection加速器质谱中心
Corresponding AuthorWang, HY (Wang, Huanye)[ 1,2,3,4 ]; Dong, HL (Dong, Hailiang)[ 5,6 ]; Zhang, CLL (Zhang, Chuanlun L.)[ 2,7 ]
Affiliation1.State Key Laboratory of Loess and Quaternary Geology, IEE, CAS, Xi'an 710075, China;
2.State Key Laboratory of Marine Geology, Tongji University, Shanghai 200092, China;
3.Key Laboratory of Salt Lake Resources and Chemistry, Qinghai Institute of Salt Lake, Chinese Academy of Sciences, China;
4.University of Chinese Academy of Sciences, Beijing 100049, China;
5.State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Beijing 100083, China;
6.Department of Geology and Environmental Earth Science, Miami University, Oxford, OH 45056, USA;
7.Department of Marine Sciences, The University of Georgia, Athens, GA 30602, USA;
8.State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430074, China;
9.Key Laboratory of Marine Chemistry Theory and Technology (Ocean University of China), Ministry of Education/Qingdao Collaborative Innovation Center of Marine Science and Technology, Qingdao 266100, China;
10.Department of Earth Sciences, The University of Hong Kong, Hong Kong, China
Recommended Citation
GB/T 7714
Wang, HY ,Dong, HL ,Zhang, CLL ,et al. Water depth affecting thaumarchaeol production in Lake Qinghai, northeastern Qinghai-Tibetan plateau: Implications for paleo lake levels and paleoclimate[J]. CHEMICAL GEOLOGY,2014,368:76-84.
APA Wang, HY .,Dong, HL .,Zhang, CLL .,Jiang, HC .,Zhao, MX .,...&Liu, WG .(2014).Water depth affecting thaumarchaeol production in Lake Qinghai, northeastern Qinghai-Tibetan plateau: Implications for paleo lake levels and paleoclimate.CHEMICAL GEOLOGY,368,76-84.
MLA Wang, HY ,et al."Water depth affecting thaumarchaeol production in Lake Qinghai, northeastern Qinghai-Tibetan plateau: Implications for paleo lake levels and paleoclimate".CHEMICAL GEOLOGY 368(2014):76-84.
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