IOCAS-IR  > 海洋生态与环境科学重点实验室
The origins and implications of glycerol ether lipids in China coastal wetland sediments
Lu, Xiaoxia1,2; Liu, Xiaolei3; Xu, Changgui4; Song, Jinming5; Li, Xuegang5; Yuan, Huamao5; Li, Ning5; Wang, Deying6; Yuan, Hongming7; Ye, Siyuan7
Corresponding AuthorLu, Xiaoxia(
AbstractCoastal wetlands are terrestrial-marine transition zones harboring diverse active microbial communities. The origins of diverse glycerol ether lipids preserved in coastal wetlands are rarely investigated. 16 surface sediments were collected from the coastal wetland at Guangrao (GR), Changyi (CY) and Xiamen (XM), where both climate and sedimentary environment show significant differences. Ten groups of glycerol ether lipids, including isoprenoidal and branched glycerol dialkyl glycerol tetraethers (iGDGTs and bGDGTs), isoprenoidal and branched glycerol dialkanol diethers (iGDDs and bGDDs), hydroxylated isoprenoidal GDGTs and GDDs (OH-GDGTs and OH-GDDs), overly branched GDGTs (OB-GDGTs), sparsely branched GDGTs (SB-GDGTs), hybrid isoprenoid/branched GDGTs (IB-GDGTs) and a tentatively assigned H-shaped branched GDGTs (H-B-GDGTs) were detected and quantified. Sediments collected in the north (Guangrao and Changyi) contain, in general, a lower abundance of GDGT (3.7-55.9 ng/g sed) than samples from south (Xiamen; 251-1020 ng/g sed). iGDGTs and bGDGTs are the predominant components at all sites and account for 17.2-74.3% and 16.1-75.1% of total ether lipids, respectively. The relative abundance of iGDGTs decreases but that of bGDGTs increases with the distance from sea, suggesting a marine vs. terrestrial origin of iGDGT and bGDGTs, respectively. In addition, the methylation index (MIOB/B/SB) of branched GDGTs shows a significant inverse correlation with water content, suggesting that marine waters have a major influence on the microbial communities inhabiting wetland sediment. Such an assumption was confirmed by the distinct lipid pattern of three low water content (<5%) samples collected in an area isolated from tidal flushing. The other isoprenoidal ether lipids, such as iGDDs, OH-GDGTs and OH-GDGTs, have a similar distribution as iGDGTs, indicating a common biological source, so do the corresponding non-isoprenoidal ether lipid series with bGDGTs. The BIT value increases with increasing distance from the sea, which implies that the BIT index can be probably applied to trace past sea level change in costal wetland settings. The reconstructed temperature from TEX86 shows significant offset from observed data, but only little deviation for the MBT/CBT calculated temperature. This suggests that the MBT/CBT has the potential to reconstruct past temperatures in coastal wetland settings.
Indexed BySCI
Funding ProjectNational Natural Science Foundation of China[41976043] ; Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology, Shandong Province[MGQNLM201808] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA23050501] ; Key Program for International Science &Technology Cooperation Projects of China[2016YFE0109600] ; China Geological Survey[DD20189503] ; Qingdao National Laboratory for Marine Science and Technology[2018SDKJ05041]
WOS Research AreaScience & Technology - Other Topics
WOS SubjectMultidisciplinary Sciences
WOS IDWOS:000501745300001
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Document Type期刊论文
Corresponding AuthorLu, Xiaoxia
Affiliation1.China Univ Geosci, Coll Marine Sci & Technol, Wuhan 430074, Peoples R China
2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao 266061, Shandong, Peoples R China
3.MARUM Ctr Marine Environm Sci, Organ Geochem Grp, D-28334 Bremen, Germany
4.CNOOC China Ltd, Tianjin Branch, Tianjin 300459, Peoples R China
5.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China
6.CNOOC, Bohai Oil Res Inst, Tianjin 300459, Peoples R China
7.China Geol Survey, Qingdao Inst Marine Geol, Key Lab Coastal Wetland Biogeosci, Qingdao 266071, Peoples R China
Recommended Citation
GB/T 7714
Lu, Xiaoxia,Liu, Xiaolei,Xu, Changgui,et al. The origins and implications of glycerol ether lipids in China coastal wetland sediments[J]. SCIENTIFIC REPORTS,2019,9:11.
APA Lu, Xiaoxia.,Liu, Xiaolei.,Xu, Changgui.,Song, Jinming.,Li, Xuegang.,...&Ye, Siyuan.(2019).The origins and implications of glycerol ether lipids in China coastal wetland sediments.SCIENTIFIC REPORTS,9,11.
MLA Lu, Xiaoxia,et al."The origins and implications of glycerol ether lipids in China coastal wetland sediments".SCIENTIFIC REPORTS 9(2019):11.
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