期刊
ORGANIC GEOCHEMISTRY
卷 31, 期 7-8, 页码 745-749出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0146-6380(00)00081-4
关键词
lakes; lipids; n-alkanes; aquatic macrophytes; delta C-13
Lipid analysis of aquatic plants from lakes on Mt. Kenya, E. Africa, revealed that non-emergent (submerged and floating-leaved) species displayed enhanced abundances of mid-chain length, C-23 and C-25 n-alkanes. In contrast, the emergent aquatic plants had n-alkane distributions similar to those of the terrestrial vegetation, typically dominated by the long-chain length homologues (> C-29). A proxy ratio, P-aq, has been formulated to reflect the non-emergent aquatic macrophyte input to lake sediments relative to that from the emergent aquatic and terrestrial plants. (C) 2000 Elsevier Science Ltd. All rights reserved.
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