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

被引：0
作者：
Yang Y. [1 ]
Hao Y. [1 ]
Ruan X. [2 ]
Li X. [3 ]
Yao Y. [3 ]
Yang C. [3 ]
机构：
[1] State Key Laboratory of Biogeology and Environmental Geology, School of Earth Sciences, China University of Geosciences, Wuhan
[2] Key Laboratory of Tectonics and Petroleum Resources, Ministry of Education, China University of Geosciences, Wuhan
[3] Guangzhou Marine Geological Survey, Ministry of Land and Resources, Guangzhou
来源：
Diqiu Kexue - Zhongguo Dizhi Daxue Xuebao/Earth Science - Journal of China University of Geosciences | 2018年 / 43卷 / 11期
关键词：
Bacteria; Fatty acid; Phytoplankton production; South China Sea; Terrestrial input;
D O I：
10.3799/dqkx.2018.284
中图分类号：
学科分类号：
摘要：
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. © 2018, Editorial Department of Earth Science. All right reserved.
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页码：4027 / 4035
页数：8
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