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dc.contributor.authorAlagarsamy, R.
dc.date.accessioned2008-07-18T05:08:37Z
dc.date.available2008-07-18T05:08:37Z
dc.date.issued2003
dc.identifier.citationChemistry and Ecology, Vol.19; 419-429p.
dc.identifier.urihttp://drs.nio.org/drs/handle/2264/1224
dc.description.abstractThe quantity and biochemical composition of organic matter (OM) in the sediments underlying and below oxygen minimum zone (OMZ) in the Arabian Sea were studied to provide information on the diagenetic processes of organic carbon under different environmental conditions. Concentrations of total organic carbon (TOC), total nitrogen (TN) and total hydrolysable amino acids (THAA) were significantly higher is sediments within rather than below OMZ, while those of total carbohydrates (TCHO) were slightly lower in the latter, suggesting the presence of a larger supply of labile compounds into the sea bottom at the shallower site (i.e. within OMZ). Hydrolysable amino acid and carbohydrate contribution to TOC were even lower (about 10% in surficial sediments) than the values obtained from the abyssal oligotrophic North Pacific, suggesting that OM food availability in the Oman Margin sediments within OMZ was lower than that observed at abyssal depths. The presence of the highest THAA and TCHO concentrations in the top 40 mm of the sediment core at both sites reflected the presence of bioturbation processes. In contrast with the general view of the deep sea as a stable and constant system, below OMZ in the Arabian Sea sediments, some differences were observed in the two investigated cores indicating the presence of a certain spatial variability in OM content and diagenesis
dc.language.isoen
dc.publisherTaylor and Francis
dc.rightsCopyright [2003]. It is tried to respect the rights of the copyright holders to the best of the knowledge. If it is brought to our notice that the rights are violated then the item would be withdrawn.
dc.subjectsediment chemistry
dc.subjectsediment composition
dc.subjectorganic matter
dc.subjectamino acids
dc.subjectcarbohydrates
dc.subjectcarbon
dc.subjectnitrogen
dc.subjectoxygen minimum layer
dc.subjectbiochemical composition
dc.titleOrganic matter composition in sediments of the Oman margin
dc.typeJournal Article


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