Size-fractionated distribution of glycerol dialkyl glycerol tetraether core lipids in surface sediments of a large-river delta-front estuary
文献类型：期刊论文
| 作者 | Wang, Jinpeng1,5,6; Zhao, Bin8; Yao, Peng3,4,7; Bianchi, Thomas S.2; Lipp, Julius S.5; Elvert, Marcus5; Yu, Zhiqiang6; Yu, Zhigang3,4; Hinrichs, Kai-Uwe5 |
| 刊名 | SCIENCE OF THE TOTAL ENVIRONMENT
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| 出版日期 | 2024-02-20 |
| 卷号 | 912页码:14 |
| 关键词 | Changjiang Estuary Surface sediments Size fractionation brGDGTs isoGDGTs BIT |
| ISSN号 | 0048-9697 |
| DOI | 10.1016/j.scitotenv.2023.169626 |
| 英文摘要 | Glycerol dialkyl glycerol tetraether core lipids (GDGTs) are microbial biomarkers ubiquitously distributed in terrestrial and marine environments. Dispersal and fate of GDGTs in an estuary largely depends on sediment grain size, however, their size distribution patterns remain poorly understood. Here, surface sediments collected from the Changjiang Estuary were separated into <20, 20-32, 32-63, 63-125 and >125 mu m fractions, and analyzed for GDGTs as well as total organic carbon (TOC), stable isotopic composition (delta 13C) of TOC and lignin phenols, to investigate the size and spatial distributions of GDGTs and the particle size effects on GDGTs proxies in this large river delta -front estuary. The concentrations of isoprenoidal GDGTs (isoGDGTs) were higher in the finest fractions and in off-estuary sites. On the contrary, branched GDGTs (brGDGTs) were high not only in the finest fractions but in coarser fractions (>32 mu m fractions), and thus at both near- and off-estuary sites. The branched and isoprenoid tetraether (BIT) index increased with increasing grain size, and decreased sharply from the estuary (-0.52) to the shelf (-0.16). BrGDGTs were positively correlated with crenarcheaol in both high and low BIT regions. The brGDGTIIIa/IIa ratios in all size fractions were <0.59, further indicating that the brGDGTs were mainly derived from terrestrial input with minimum in -situ production. Fractional TOC source assignments derived from the BIT index was significantly positively correlated with the fractions of terrestrial OC from a mixing model based on delta C-13-TOC and lignin contents, indicating that BIT may track a broader pool of terrestrial OC than just soil OC. This work provides novel, yet preliminary insights into the size fractionated distribution characteristics of GDGTs and the applicability of BIT as a proxy for OC sources in estuarine sediments. More work is needed to further clarify the particle size effects on other GDGTs proxies in estuarine systems. |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:001154188200001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/76227]  |
| 专题 | 有机地球化学国家重点实验室 |
| 通讯作者 | Yao, Peng |
| 作者单位 | 1.Minist Ecol & Environm, South China Inst Environm Sci, State Environm Protect Key Lab Water Environm Simu, Guangzhou 510535, Peoples R China 2.Univ Florida, Dept Geol Sci, Gainesville, FL 32611 USA 3.Lab Marine Ecol & Environm Sci, Qingdao Natl Lab Marine Sci & Technol, Qingdao 266237, Peoples R China 4.Ocean Univ China, Frontiers Sci Ctr Deep Ocean Multispheres & Earth, Key Lab Marine Chem Theory & Technol, Minist Educ, Qingdao 266100, Peoples R China 5.Univ Bremen, MARUM Ctr Marine Environm Sci, Leobener Str 8, D-28359 Bremen, Germany 6.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Organ Geochem, Guangzhou 510640, Peoples R China 7.Ocean Univ China, Frontiers Sci Ctr Deep Ocean Multispheres & Earth, Key Lab Marine Chem Theory & Technol, Minist Educ, 238 Songling Rd, Qingdao 266100, Peoples R China 8.Minist Nat Resources, Inst Oceanog 1, Key Lab Marine Ecoenvironm Sci & Technol, Qingdao 266061, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Jinpeng,Zhao, Bin,Yao, Peng,et al. Size-fractionated distribution of glycerol dialkyl glycerol tetraether core lipids in surface sediments of a large-river delta-front estuary[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2024,912:14. |
| APA | Wang, Jinpeng.,Zhao, Bin.,Yao, Peng.,Bianchi, Thomas S..,Lipp, Julius S..,...&Hinrichs, Kai-Uwe.(2024).Size-fractionated distribution of glycerol dialkyl glycerol tetraether core lipids in surface sediments of a large-river delta-front estuary.SCIENCE OF THE TOTAL ENVIRONMENT,912,14. |
| MLA | Wang, Jinpeng,et al."Size-fractionated distribution of glycerol dialkyl glycerol tetraether core lipids in surface sediments of a large-river delta-front estuary".SCIENCE OF THE TOTAL ENVIRONMENT 912(2024):14. |
入库方式： OAI收割
来源：广州地球化学研究所
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