IDENTIFICATION OF SULFATE REDUCING BACTERIA AND SULFUR-OXIDIZING BACTERIA IN MARINE SEDIMENTS FROM SHENHU AREA, NORTHERN SOUTH CHINA SEA: IMPLICATION FROM FATTY ACIDS

MAO Shengyi; ZHU Xiaowei; SUN Yongge; GUAN Hongxiang; WU Daidai; WU Nengyou

doi:10.3724/SP.J.1140.2015.02139

2015 Vol. 35, No. 2

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MAO Shengyi, ZHU Xiaowei, SUN Yongge, GUAN Hongxiang, WU Daidai, WU Nengyou. IDENTIFICATION OF SULFATE REDUCING BACTERIA AND SULFUR-OXIDIZING BACTERIA IN MARINE SEDIMENTS FROM SHENHU AREA, NORTHERN SOUTH CHINA SEA: IMPLICATION FROM FATTY ACIDS[J]. Marine Geology & Quaternary Geology, 2015, 35(2): 139-148. doi: 10.3724/SP.J.1140.2015.02139

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MAO Shengyi, ZHU Xiaowei, SUN Yongge, GUAN Hongxiang, WU Daidai, WU Nengyou. IDENTIFICATION OF SULFATE REDUCING BACTERIA AND SULFUR-OXIDIZING BACTERIA IN MARINE SEDIMENTS FROM SHENHU AREA, NORTHERN SOUTH CHINA SEA: IMPLICATION FROM FATTY ACIDS[J]. Marine Geology & Quaternary Geology, 2015, 35(2): 139-148. doi: 10.3724/SP.J.1140.2015.02139

IDENTIFICATION OF SULFATE REDUCING BACTERIA AND SULFUR-OXIDIZING BACTERIA IN MARINE SEDIMENTS FROM SHENHU AREA, NORTHERN SOUTH CHINA SEA: IMPLICATION FROM FATTY ACIDS

1. Guangzhou Institute of Energy Conversion, CAS, Guangzhou 510640;
2. Guangzhou Center for Gas Hydrate Research, CAS, Guangzhou 510640;
3. Guangzhou Institute of Geochemistry, CAS, Guangzhou 510640;
4. Department of Geosciences, Zhejiang University, Hangzhou 310027

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Corresponding author: ZHU Xiaowei, miseraboy@126.com

Received Date: 11 July 2014

Revised Date: 09 October 2014

Abstract

Abstract

The lipid biomarkers of fatty acids in Site4B sediments from Shenhu Area, Northern South China Sea are studied in this paper and the sources of branched fatty acids and monounsaturated fatty acids are discussed. The results reveal that i/a-C15:0, i/a-C17:0, 16:1ω5 and 18:1ω9 are derived from sulfate reducing bacteria (SRB), while 16:1ω7t/c and 18:1ω7 are originated from sulfur-oxidizing bacteria (SOB). The distribution of SRB and SOB may be related with the process that sulfate was reduced to sulfide, and then sulfide oxidized to sulfate and element of sulfur, and at last elemental sulfur was disproportionated to sulfide and sulfate. In this process, SRB dominated the sulfur cycle system in the sediments. The increasing biomass of SRB and SOB at depths of 95~97 cm is related with diapire structure around Site4B, which carries a great amount of nutrient fluid.
- sulfate reducing bacteria /
- sulfur-oxidizing bacteria /
- fatty acid /
- Shenhu Area

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References

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