Early diagenesis of fatty acids in lacustrine sediments--I. Identification and distribution of fatty acids in recent sediment from a freshwater lake

Details Early diagenesis of fatty acids in lacustrine sediments--I. Identification and distribution of fatty acids in recent sediment from a freshwater lake Early diagenesis of fatty acids in lacustrine sediments--I. Identification and distribution of fatty acids in recent sediment from a freshwater lake

Jun 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977gecoa..41..777m&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 41, Issue 6, pp.777-783

Physics

3

Scientific paper

Fatty acids have been isolated and quantitatively determined from a 1.5 m sediment core of Lake Suwa, a eutrophic lake in the central districts of Japan. The fatty acids identified by combined gas chromatography-mass spectrometry were straight-chain saturated (C 12 to C 34 ), monounsaturated with even carbon number (C 16 to C 24 ) and branched-chain ( iso, anteiso , 10-methyloctadecanoic) acids. The concentrations of the higher molecular weight ( C 20 ) saturated fatty acids remained nearly constant throughout the core, suggesting a high degree of preservation of those acids, whereas the monounsaturated and the lower molecular weight saturated fatty acids indicated a great decrease in concentration with depth to an approximately 20cm level. It is suggested that the microbial activity in sediments causes a significant reconstruction of the fatty acid distribution during early diagenesis.

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