Sources and reactivities of marine-derived organic matter in coastal sediments as determined by alkaline CuO oxidation

Details Sources and reactivities of marine-derived organic matter in coastal sediments as determined by alkaline CuO oxidation Sources and reactivities of marine-derived organic matter in coastal sediments as determined by alkaline CuO oxidation

Jul 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995gecoa..59.2965g&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 59, Issue 14, pp.2965-2981

Mathematics

Logic

14

Scientific paper

Alkaline CuO oxidation of ubiquitous biochemicals such as proteins, polysaccharides, and lipids, yields specific products, including fatty acids, diacids, and carboxylated phenols. Oxidation of a variety of marine organisms, including macrophytes, phytoplankton, zooplankton, and bacteria, yields these CuO products in characteristic patterns that can often differentiate these biological sources. Sediments from Skan Bay (Unalaska Island, Alaska) display organic carbon and total nitrogen profiles which are consistent with three kinetically distinct pools of organic matter. The CuO fingerprints of these sediments distinguish these three pools at the molecular level, indicating a highly labile, fatty acid-rich surface organic layer of likely bacterial origin, intermediately reactive kelp debris and a background of phytoplankton remains that predominates at depth. The CuO method, which has been previously applied only to characterize cutin and lignin constituents of vascular land plants, also provides information on other types of abundant biochemicals, including those indicative of marine sources.

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