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题名: Carbon isotopic characteristics and their genetic relationships for individual lipids in plants and sediments from a marsh sedimentary environment
作者: Duan, Y ; Zhang, H ; Zheng, CY ; Wu, BX ; Zheng, GD
刊名: CHINESE SCIENCE BULLETIN
出版日期: 2005
卷号: 48, 期号:8, 页码:1203-1210
关键词: marsh environment ; plants ; sediments ; individual lipids ; carbon isotopic compositions ; genetic relationships
学科分类: Geosciences, Multidisciplinary
英文摘要: Molecular composition and compound-specific carbon and hydrogen stable isotope ratios of n-alkanes are presented for leaves of grass, reeds and trees from five regions extending between latitudes 22 degrees and 39 degrees, China. The distribution of n-alkanes ranges from C(15) to C(35) with a high odd over even predominance and carbon-number maxima at C(27), C(29) or C(31). The carbon preference index (CPI) values are from 3.49 to 17.25, with mean values increasing following tree leaf > reed > grass. The average chain length (ACL) values are between 26.24 and 30.26 and the mean values increase following grass > reed > tree leaf. It is observed that C(max), CPI and ACL values of n-alkanes in plants from low latitudes are higher than those from high latitudes. The delta(13)C values of C(27) and C(29) n-alkanes in plants range from -25.3 to -35.5 parts per thousand and the grass has a lighter mean carbon isotopic composition than the reed and tree leaf. The delta D values of C(27) and C(29) n-alkanes in the plants are between -132.1 and -192.6%0 and the mean hydrogen isotopic compositions of C(27) and C(29) n-alkanes in the grass are lighter than those in the reed and tree leaves. C(27) and C(29) n-alkanes in the grass and tree leaves from high-latitude and elevation area have relatively lighter hydrogen isotopic composition, indicating that these delta D values can be used as excellent indicators of environment and climate.
收录类别: SCI
语种: 英语
内容类型: 期刊论文
URI标识: http://ir.lig.ac.cn/handle/132962/2092
Appears in Collections:油气地球化学研究室_期刊论文

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Duan, Y; Zhang, H; Zheng, CY; Wu, BX; Zheng, GD.Carbon isotopic characteristics and their genetic relationships for individual lipids in plants and sediments from a marsh sedimentary environment,CHINESE SCIENCE BULLETIN,2005,48(8):1203-1210
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