Sedimentary pigments and nature of organic matter within the oxygen minimum zone (OMZ) of the Eastern Arabian Sea (Indian margin)

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dc.contributor.author Rasiq, K.T.
dc.contributor.author Kurian, S.
dc.contributor.author Karapurkar, S.G.
dc.contributor.author Naqvi, S.W.A.
dc.date.accessioned 2016-06-14T06:46:47Z
dc.date.available 2016-06-14T06:46:47Z
dc.date.issued 2016
dc.identifier.citation Estuarine, Coastal and Shelf Science, vol.176; 2016; 91-101
dc.identifier.other no
dc.identifier.uri http://drs.nio.org/drs/handle/2264/4974
dc.description.abstract Sedimentary pigments, carbon and nitrogen content and their stable isotopes were studied in three short cores collected from the oxygen minimum zone (OMZ) of the Eastern Arabian Sea (EAS). Nine pigments including chlorophyll a and their degradation products were quantified using High Performance Liquid Chromatography (HPLC). Astaxanthin followed by canthaxanthin and zeaxanthin were the major carotenoids detected in these cores. The total pigment concentration was high in the core collected from 500 m water depth (6.5 microgg<sup>-1</sup>) followed by 800 m (1.7 microgg<sup>-1</sup>) and 1100 m (1.1 microgg<sup>-1</sup>) depths respectively. The organic carbon did not have considerable control on sedimentary pigments preservation. Pigment degradation was comparatively high in the core collected from the 800 m site which depended not only the bottom dissolved oxygen levels, but also on the faunal activity. As reported earlier, the bottom water dissolved oxygen and presence of fauna have good control on the organic carbon accumulation and preservation at Indian margin OMZ sediments. The C/N ratios and delta13C values for all the cores conclude the marine origin of organic matter and delta15N profiles revealed signature of upwelling associated denitrification within the water column
dc.language.iso en
dc.publisher Elsevier
dc.relation.requires Estuar_Coast_Shelf_Sci_176_91.jpg
dc.rights An edited version of this paper was published by Elsevier. Copyright [2016] Elsevier
dc.subject CHEMISTRY AND BIOGEOCHEMISTRY
dc.subject CHEMISTRY AND BIOGEOCHEMISTRY
dc.subject GEOLOGY AND GEOPHYSICS
dc.subject CHEMISTRY AND BIOGEOCHEMISTRY
dc.title Sedimentary pigments and nature of organic matter within the oxygen minimum zone (OMZ) of the Eastern Arabian Sea (Indian margin)
dc.type Journal Article


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