Natural product biomarkers as indicators of sources and transport of sedimentary organic matter in a subtropical river

Chemosphere
Rudolf JafféBernd R T Simoneit

Abstract

The sources and transformations of sedimentary organic matter along the Harney River, a representative subtropical river of the Florida Everglades, were assessed using a natural product biomarker approach. Sediment samples were collected from the headwaters to the Continental Shelf, with characteristic vegetation dominated by freshwater marsh species, mangrove (middle to lower estuary), and seagrass as the marine end-member. A peat sample was collected inland. All sample extracts were analyzed by GC-MS as underivatized and as silylated compounds. With these total extract analyses, major compound classes can be defined: n-alkanols, n-alkanoic acids, methyl alkanoates, methyl alpha- and omega-hydroxyalkanoates, triterpenoids, phytosterols and saccharides, with traces of hydrocarbons. In general, the peat sample extract has a different overall composition compared to the sediment extracts. The major differences include distinct carbon number maxima for the lipid series (e.g., C(max)=28 for n-alkanols) probably from sawgrass and periphyton biomass, and predominance of phytosterols (sitosterol and stigmasterol) from higher plant detritus. In contrast, river sediment extracts contain biomarkers predominantly from mangrove-derived org...Continue Reading

References

Jun 9, 1967·Science·G Eglinton, R J Hamilton
Jan 1, 1982·Progress in Lipid Research·P A Cranwell

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Citations

Sep 18, 2009·Analytical and Bioanalytical Chemistry·Corinne C HoergerThomas D Bucheli
Dec 7, 2013·Environmental Science & Technology·Shawn P McElmurryThomas C Voice
Apr 24, 2010·International Journal of Analytical Chemistry·Orok E Oyo-ItaBernd R T Simoneit
Apr 20, 2010·Journal of Chromatography. a·V López-DíasL López-Merino
Jan 9, 2007·Journal of Chromatography. a·Patricia M Medeiros, Bernd R T Simoneit
Jul 19, 2013·Water Research·Barbara A CottrellWilliam J Cooper
Jul 12, 2012·Anais Da Academia Brasileira De Ciências·Cesar A Silva, Luiz A S Madureira
Nov 13, 2007·Phytochemical Analysis : PCA·Venkatesan KumarPulok K Mukherjee

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