南海不同水深表层沉积物脂肪酸分布特征及其生物源的空间变化

杨义; 郝宇昕; 阮小燕; 李学杰; 姚永坚; 杨楚鹏

doi:10.3799/dqkx.2018.284

Volume 43 Issue 11

Nov. 2018

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Article Navigation > Earth Science > 2018 > 43(11): 4027-4035

CHENG Qiu-ming, 2011. Singularity Modeling of Geo-Anomalies and Recognition of Anomalies Caused by Buried Sources. Earth Science, 36(2): 307-316. doi: 10.3799/dqkx.2011.032

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Yang Yi, Hao Yuxin, Ruan Xiaoyan, Li Xuejie, Yao Yongjian, Yang Chupeng, 2018. Spatial Distribution of Fatty Acids and Inferred Organisms in Surface Sediments of Different Water Depths in the South China Sea. Earth Science, 43(11): 4027-4035. doi: 10.3799/dqkx.2018.284

CHENG Qiu-ming, 2011. Singularity Modeling of Geo-Anomalies and Recognition of Anomalies Caused by Buried Sources. Earth Science, 36(2): 307-316. doi: 10.3799/dqkx.2011.032

Citation:

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Spatial Distribution of Fatty Acids and Inferred Organisms in Surface Sediments of Different Water Depths in the South China Sea

doi: 10.3799/dqkx.2018.284

1.
State Key Laboratory of Biogeology and Environmental Geology, School of Earth Sciences, China University of Geosciences, Wuhan 430074, China
2.
Key Laboratory of Tectonics and Petroleum Resources, Ministry of Education, China University of Geosciences, Wuhan 430074, China
3.
Guangzhou Marine Geological Survey, Ministry of Land and Resources, Guangzhou 510075, China

Received Date: 2018-03-17
Publish Date: 2018-11-15

Abstract

Abstract

To investigate the spatial distribution of lipid biomarkers from offshore to deep basin in the marginal sea, fatty acids (FAs) in surface sediments collected from different water depths across four different transects were studied. Abundant FAs, including saturated and unsaturated normal FAs, as well as saturated iso- and anteiso-FAs, were detected. The FAs are dominated by short-chain saturated FAs, showing a mono-model distribution. The long-chain FAs, showing an even-over-odd distribution, are mainly derived from terrestrial higher plants, and short-chain normal FAs are derived from marine phytoplankton, while saturated iso- and anteiso-FAs are mainly contributed by marine bacteria. The long-chain FAs derived from the higher plants show the higher concentration in the coastal area which is contributed by the fluvial input, as well as in the deep basin which may be resulted from the ocean current, and likely, the aeolian dust input. Branched short-chain FAs indicate that the bacteria have great contribution in the coastal area but not in the deep basin. Short-chain normal FAs indicate that the phytoplankton relative abundance is great in northeast South China Sea and the deep basin. The higher contribution of both bacteria and phytoplankton in the coastal area is possibly related to higher nutrient input, while the higher phytoplankton distribution in the deep basin may be influenced by the ocean current or other input.
- South China Sea,
- fatty acid,
- terrestrial input,
- phytoplankton production,
- bacteria

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致谢: 本研究受国家重点研发计划项目(2016YFA0601100)和自然资源部广州海洋地质调查局项目(GZH201500202)资助，两位审稿人提出了宝贵的修改意见，在此一并致以诚挚的感谢!

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Spatial Distribution of Fatty Acids and Inferred Organisms in Surface Sediments of Different Water Depths in the South China Sea

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