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| Carbon isotopic studies of individual lipids in organisms from the Nansha sea area, China | |
| 作者姓名： | DUAN Yi SONG Jinming & ZHANG Hui . Lanzhou Institute of Geology Chinese Academy of Sciences Lanzhou China . School of Geology Lanzhou University Lanzhou China . Institute of Oceanology Chinese Academy of Sciences Qingdao China |
| 作者单位： | DUAN Yi1，2，SONG Jinming3 & ZHANG Hui1 1. Lanzhou Institute of Geology，Chinese Academy of Sciences，Lanzhou 730000，China; 2. School of Geology，Lanzhou University，Lanzhou 730000，China; 3. Institute of Oceanology，Chinese Academy of Sciences，Qingdao 266071，China |
| 基金项目： | 国家自然科学基金，the Important Direction Project of Knowledge Innovation in Resource and Environment Field;Chinese Academy of Sciences，国家杰出青年科学基金 |
| 摘 要： | Sediments contain abundant lipid compounds in general, which are used as biomarker compounds to study organic matter sources and reconstruct the pa-laeoenvironments1—7]. However, lipid compounds in sediments are generally a mixture of various genetic components so that it is difficult to correctly decouple their biological sources only by the results of bio-chemical researches. Carbon isotopic studies of indi-vidual sedimentary lipid compounds can discover their genetic information, which pr… |
| 收稿时间： | 7 April 2003 |
Carbon isotopic studies of individual lipids in organisms from the Nansha sea area, China |
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| DUAN Yi,,SONG Jinming & ZHANG Hui . Lanzhou Institute of Geology,Chinese Academy of Sciences,Lanzhou ,China, . School of Geology,Lanzhou University,Lanzhou ,China, . Institute of Oceanology,Chinese Academy of Sciences,Qingdao ,China.Carbon isotopic studies of individual lipids in organisms from the Nansha sea area, China[J].Science in China(Earth Sciences),2004,47(7):593-598. | |
| Authors: | DUAN Yi SONG Jinming ZHANG Hui |
| Institution: | 1. Lanzhou Institute of Geology, Chinese Academy of Sciences, Lanzhou 730000, China;School of Geology, Lanzhou University, Lanzhou 730000, China 2. Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China 3. Lanzhou Institute of Geology, Chinese Academy of Sciences, Lanzhou 730000, China |
| Abstract: | Carbon isotopes of individual lipids in typical organisms from the Nansha sea area were measured by the GC-IRMS analytical technique. δ13C values of saturated fatty acids in different organisms examined are from 25.6‰ to 29.7‰ with the average values ranging from 26.4‰ to 28.2‰ and the variance range of 1.8‰ between different organisms is also observed. Unsaturated fatty acids have heavy carbon isotopic compositions and the mean differences of 2.9‰–6.8‰ compared to the same carbon number saturated fatty acids. δ13C values of n-alkanes range from 27.5‰ to 29.7‰ and their mean values, ranging from 28.6‰ to 28.9‰, are very close in different organisms. The mean difference in δ13C between the saturated fatty acids and n-alkanes is only 1.5‰, indicating that they have similar biosynthetic pathways. The carbon isotopic variations between the different carbon-number lipids are mostly within ±2.0‰, reflecting that they experienced a biosynthetic process of the carbon chain elongation. At the same time, the carbon isotopic genetic relationships between the biological and sedimentary lipids are established by comparative studies of carbon isotopic compositions of individual lipids in organisms and sediments from the Nansha sea area, which provides scientific basis for carbon isotopic applied research of individual lipids. |
| Keywords: | marine organisms individual lipids carbon isotopic compositions genetic relationships |
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