Is the maximum carbon number of long-chain n-alkanes an indicator of grassland or forest? Evidence from surface soils and modern plants
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- 作者：ZhiGuo Rao (1) (2)
Yi Wu (1) (3)
ZhaoYu Zhu (1)
GuoDong Jia (1)
Andrew Henderson (4) - 关键词：surface soils ; modern plants ; long ; chain n ; alkanes ; molecular distribution ; vegetation type
- 刊名：Chinese Science Bulletin
- 出版年：2011
- 出版时间：June 2011
- 年：2011
- 卷：56
- 期：16
- 页码：1714-1720
- 全文大小：636KB
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Yi Wu (1) (3)
ZhaoYu Zhu (1)
GuoDong Jia (1)
Andrew Henderson (4)
1. Key Laboratory of Marginal Sea Geology, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, China
2. Key Laboratory of Western China鈥檚 Environmental Systems (Ministry of Education), Lanzhou University, Lanzhou, 730000, China
3. Graduate University of Chinese Academy of Sciences, Beijing, 100049, China
4. School of Geographical & Earth Sciences, University of Glasgow, Glasgow, G12 8QQ, UK - ISSN：1861-9541
文摘
The molecular distribution of long-chain n-alkanes in 62 soil samples collected from diverse locations across eastern China was analyzed. The long-chain n-alkanes were mostly dominated by n-C29 or n-C31, regardless of the overlying vegetation type at each site. The results were compared with those summarized from the literature, covering more than 100 soil samples within China and more than 300 genera of modern plants distributed worldwide. There were similar n-alkane distribution patterns for most genera, with no clear differences among grasses, shrubs, and trees. The evidence from analyses of surface soils and modern plants indicates that the relationship between the molecular distribution of long-chain n-alkanes of surface soils and source vegetation is highly complex, and is influenced by many factors. Further, it is suggested that source vegetation types should not be simply inferred from distribution patterns of long-chain n-alkanes in sediments.