Unusually low TEX86 values in the transitional zone between Pearl River estuary and coastal South China Sea: Impact of changing archaeal community composition
Wang, Jin-Xiang; Wei, Yuli; Wang, Peng; Hong, Yiguo; Zhang, Chuanlun L.; jinxiang@uga.edu; yl_wei@shou.edu.cn; archaeazhang_1@tongji.edu.cn
2015
发表期刊CHEMICAL GEOLOGY
卷号402页码:18-29
文章类型0009-2541
摘要TEX86, calculated based on the distribution of isoprenoid glycerol dialkyl glycerol tetraethers (GDGTs), is used worldwide for paleotemperature reconstruction in marine and lacustrine environments. Recently, however, increasing evidence showed that TEX86 could be affected by multiple environmental variables. In this study, TEX86 was calculated for core and polar GDGTs obtained from water column and surface sediments in the lower Pearl River and its estuary. Together with previously published core GDGT data from the coastal and open South China Sea (SCS), a comparison was made between TEX86-derived and satellite-based surface water temperature, which showed a TEX86-temperature minimum that is considerably lower than winter satellite temperature in the transitional zone between the Pearl River estuary and the coastal SCS. TEX86 showed significantly positive correlation with GDGT-2 and GDGT-3 in this transitional zone, indicating that they are the primary compounds for the TEX86 bias toward cooler temperature. Lipid and molecular DNA data both indicate that the variation in archaeal community composition rather than water depth or seasonality is likely the crucial factor causing the deviation of TEX86 in the transitional area. Our study has implications for studies in ancient continental margins where unusually low TEX86 temperatures may be observed in the geological record. (C) 2015 Elsevier B.V. All rights reserved.
部门归属[Wang, Jin-Xiang; Wang, Peng; Zhang, Chuanlun L.] Tongji Univ, State Key Lab Marine Geol, Shanghai 200092, Peoples R China; [Wang, Jin-Xiang] Univ Georgia, Dept Marine Sci, Athens, GA 30602 USA; [Wei, Yuli] Shanghai Ocean Univ, Hadal Sci & Technol Res Ctr, Shanghai, Peoples R China; [Hong, Yiguo] Chinese Acad Sci, South China Sea Inst Oceanog, State Key Lab Trop Marine Environm, Guangzhou 510301, Guangdong, Peoples R China ; LTO
关键词Tex86 Isoprenoid Gdgts The Lower Pearl River Estuary South China Sea
学科领域Geochemistry & Geophysics
文献类型期刊论文
条目标识符http://ir.scsio.ac.cn/handle/344004/15085
专题热带海洋环境国家重点实验室(LTO)
通讯作者jinxiang@uga.edu; yl_wei@shou.edu.cn; archaeazhang_1@tongji.edu.cn
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GB/T 7714
Wang, Jin-Xiang,Wei, Yuli,Wang, Peng,et al. Unusually low TEX86 values in the transitional zone between Pearl River estuary and coastal South China Sea: Impact of changing archaeal community composition[J]. CHEMICAL GEOLOGY,2015,402:18-29.
APA Wang, Jin-Xiang.,Wei, Yuli.,Wang, Peng.,Hong, Yiguo.,Zhang, Chuanlun L..,...&archaeazhang_1@tongji.edu.cn.(2015).Unusually low TEX86 values in the transitional zone between Pearl River estuary and coastal South China Sea: Impact of changing archaeal community composition.CHEMICAL GEOLOGY,402,18-29.
MLA Wang, Jin-Xiang,et al."Unusually low TEX86 values in the transitional zone between Pearl River estuary and coastal South China Sea: Impact of changing archaeal community composition".CHEMICAL GEOLOGY 402(2015):18-29.
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