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Source and implication of fatty acids in surface sediments from the Pearl River Mouth Basin, South China Sea
Mao, Shengyi1; Zhu, Xiaowei2; Sun, Yongge3; Guan, Hongxiang1; Wu, Daidai1; Wu, Nengyou1
2015-10-01
Source PublicationINDIAN JOURNAL OF GEO-MARINE SCIENCES
Volume44Issue:10Pages:1528-1539
AbstractPresent study consists the fatty acid composition of five samples of Site 4B surface sediment from the Pearl River Mouth Basin in the South China Sea. Total fatty acid (TFA) content of the ranged from 5.14 mu g/g to 8.99 mu g/g (mu g FA/g dry sediment), and the carbon number ranged from C-12 to C-32. The fatty acids detected in the five surface samples include the normal saturated fatty acids, branched-chain fatty acids, monounsaturated fatty acids, polyunsaturated fatty acids, and isoprenoid acids. Short-chain fatty acids in the normal saturated fatty acids were mainly from the marine microorganisms, whereas the long-chain fatty acids were from terrigenous higher plants. The higher concentration of short-chain fatty acids relative to the long-chain fatty acids indicates that the input from marine microorganisms in the surface sediment is far greater than that from terrigenous higher plants. The branched-chain fatty acids i/a15:0, i/a17:0, and 1 Ome16:0 and the monounsaturated fatty acids 18:1(09 and 16:10)9 were mainly synthesized by sulfate-reducing bacteria, whereas 16:1 omega 7 was from the sulfur-oxidizing bacteria. Relative content of the different fatty acids indicate that the surface sediment is dominated by a reductive environment. In addition, eight isoprenoid acids including phytanic acid, 17 beta(H),21 beta(H)-32-bi-homohopanoic acid, and pristane acid were detected in the surface sediment, and they mainly originated from chlorophyll a and bacteria.
SubtypeArticle
KeywordFatty Acids Carbon Isotopic South China Sea Pearl River Mouth Basin
WOS HeadingsScience & Technology ; Physical Sciences
WOS Subject ExtendedOceanography
WOS KeywordSULFATE-REDUCING BACTERIA ; GULF-OF-MEXICO ; ORGANIC-MATTER ; LIPID BIOMARKERS ; MARINE-SEDIMENTS ; NORTH PACIFIC ; MICROBIAL COMMUNITIES ; HYDROTHERMAL VENTS ; CONTINENTAL-SLOPE ; WESTERN PACIFIC
Indexed BySCI
Language英语
Funding OrganizationGuangzhou Marine Geological Survey ; Major State Basic Research Development Program(2009CB219506) ; NSFC(U0933004 ; State Key Laboratory of Organic Geochemistry Open Fund(OGL-201209) ; 41303067 ; 41103043)
WOS SubjectOceanography
WOS IDWOS:000379451200008
Citation statistics
Document Type期刊论文
Identifierhttp://ir.giec.ac.cn/handle/344007/11799
Collection中国科学院广州能源研究所
Affiliation1.Chinese Acad Sci, Guangzhou Inst Energy Convers, Key Lab Gas Hydrate, Guangzhou 510640, Guangdong, Peoples R China
2.Chinese Acad Sci, Key Lab Marginal Sea Geol, South China Sea Inst Oceanol, Guangzhou 510301, Guangdong, Peoples R China
3.Zhejiang Univ, Dept Geosci, Hangzhou 310037, Zhejiang, Peoples R China
Recommended Citation
GB/T 7714
Mao, Shengyi,Zhu, Xiaowei,Sun, Yongge,et al. Source and implication of fatty acids in surface sediments from the Pearl River Mouth Basin, South China Sea[J]. INDIAN JOURNAL OF GEO-MARINE SCIENCES,2015,44(10):1528-1539.
APA Mao, Shengyi,Zhu, Xiaowei,Sun, Yongge,Guan, Hongxiang,Wu, Daidai,&Wu, Nengyou.(2015).Source and implication of fatty acids in surface sediments from the Pearl River Mouth Basin, South China Sea.INDIAN JOURNAL OF GEO-MARINE SCIENCES,44(10),1528-1539.
MLA Mao, Shengyi,et al."Source and implication of fatty acids in surface sediments from the Pearl River Mouth Basin, South China Sea".INDIAN JOURNAL OF GEO-MARINE SCIENCES 44.10(2015):1528-1539.
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