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- W1982191729 endingPage "421" @default.
- W1982191729 startingPage "410" @default.
- W1982191729 abstract "The distribution and compound-specific carbon isotope ratios of n-alkanes and fatty acids in a sediment core (63 cm) collected from Lake Dianchi were examined to investigate organic matter sources in the eutrophic lake. Fatty acids included free and bound fatty acids. The carbon isotope compositions of individual n-alkanes and fatty acids from Lake Dianchi sediments were determined using gas chromatography/isotope ratio mass spectrometry (GC–IRMS). The δ13C values of individual n-alkanes (C16–C31) varied between − 24.1‰ and − 35.6‰, suggesting a dominance of 13C-depleted n-alkanes that originated from C3 plants and lacustrine algae. Fatty acids from the sediment extracts were analyzed for their abundances and carbon isotopic compositions. Molecular and isotopic evidence indicates that most of the short-chain fatty acids from Lake Dianchi sediment extracts are sourced from intense microbial recycling and resynthesis of organic matter. Long-chain free fatty acids are mainly derived from terrestrial sources. However, long-chain bound fatty acids are sourced from a combination of terrestrial organic matter, bacteria and algae, with the contribution from algal sources higher in the hypereutrophic stage." @default.
- W1982191729 created "2016-06-24" @default.
- W1982191729 creator A5002558474 @default.
- W1982191729 creator A5010280012 @default.
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- W1982191729 creator A5057785820 @default.
- W1982191729 creator A5082434401 @default.
- W1982191729 date "2014-03-01" @default.
- W1982191729 modified "2023-10-15" @default.
- W1982191729 title "Source characterization of sedimentary organic matter using molecular and stable carbon isotopic composition of n-alkanes and fatty acids in sediment core from Lake Dianchi, China" @default.
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