Lipid biomarker composition in surface sediments from the Carlsberg Ridge near the Tianxiu Hydrothermal Field

查看全文 作　　者：Shengyi [1]Mao;Hongxiang [1]Guan;Lihua [1]Liu;Xiqiu [2]Han;Xueping [3]Chen;Juan [3]Yu;Yongge [4]Sun;Yejian [2]Wang

机构地区：[1]CAS Key Laboratory of Gas Hydrate,Guangzhou Institute of Energy Conversion,Chinese Academy of Sciences,Guangzhou 510640,China;[2]Key Laboratroy of Submarine Geosciences&Second Institute of Oceanography,Ministry of Natural Resources,Hangzhou 310012,China;[3]School of Environmental and Chemical Engineering,Shanghai University,Shanghai 200444,China;[4]Institute of Environmental and Biogeochemistry(eBig),School of Earth Sciences,Zhejiang University,Hangzhou 310027,China

出　　处：《Acta Oceanologica Sinica》索引2021年第40卷第8期,共12页

基　　金：The Key-Area Research and Development Program of Guangdong Province under contract No.2020B1111010004;the Science and Technology Program of Guangzhou,China under contract Nos 201804010264 and 201804010372;the Guangdong MEPP Fund under contract No.GDOE[2019]A41;the National Natural Science Foundation of China under contract No.91951201;the China Ocean Mineral Resources R&D Association Project under contract No.DY135-S2-1-05。 摘　　要：Hydrothermal venting has a profound effect on the chemical and biological properties of local and distal seawater and sediments. In this study, lipid biomarkers were analyzed to examine the potential influence of hydrothermal activity on the fate of organic matter(OM) in surface sediments around Tianxiu Hydrothermal Field in the Carlsberg Ridge(CR), Northwest Indian Ocean. By comparing the biomarker distributions of the samples with that of other typical hydrothermal sediments in the mid ocean ridge, it is shown that the location of the samples is not affected by the hydrothermal activity. The relatively low abundances of terrestrial n-alkyl lipids and riverine1,15-C_(32) diol suggested a minor contribution of terrigenous OM to the study area. The bacteria contributed predominantly to sedimentary marine OM;however, other marine source organisms, e.g., eukaryotes(i.e.,phytoplankton and fungi) could not be completely neglected. The marine-originated biomarkers showed significantly variable distributions between the two sediments, suggesting different dynamic physical and biogeochemical processes controlling the fate of marine OM. This study identified various diagnostic biomarkers(5,5-diethyl alkanes, diols and β-OH FAs), which may have significant environmental implications for future works in this region. 关键词：Carlsberg Ridge Tianxiu Hydrothermal Field surface sediments biomarkers

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Lipid biomarker composition in surface sediments from the Carlsberg Ridge near the Tianxiu Hydrothermal Field

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