Show simple item record

dc.contributor.authorLinsy, P.
dc.contributor.authorNath, B.N.
dc.contributor.authorMascarenhas-Pereira, M.B.L.
dc.contributor.authorVinitha, P.V.
dc.contributor.authorRay, D.
dc.contributor.authorPrakashBabu, C.
dc.contributor.authorRao, B.R.
dc.contributor.authorKazip, A.
dc.contributor.authorSebastian, T.
dc.contributor.authorKocherla, M.
dc.contributor.authorMiriyala, P.
dc.date.accessioned2018-06-06
dc.date.accessioned2018-10-23T09:24:46Z
dc.date.available2018-02-20
dc.date.available2018-10-23T09:24:46Z
dc.date.issued2018
dc.identifier.citationMarine Chemistry, vol.199; 2018; 53-66
dc.identifier.issn0304-4203
dc.identifier.urihttps://doi.org/10.1016/J.MARCHEM.2018.01.007
dc.identifier.urihttp://drs.nio.org/drs/handle/2264/7715
dc.description.abstractResults of a study on phosphorus (P) cycling in the Eastern Arabian Sea provides convincing evidence of present-day phosphogenesis in the study area. This finding contrasts with previous reports of the occurrence of only old phosphorites along the Indian margin. Extensive benthic P regeneration is observed in the sediments that are deposited on topographic highs in the western Indian continental margin, which is impinged by a perennial oxygen minimum zone (OMZ). The phosphate flux from the sediments ranged between 1.1 and 22mmolm?2yr?1. Among the P reservoirs, biogenic P (Pbio) is the major pool of P within the upper 30cm of sediment. P released from organic matter decomposition and fish debris dissolution mainly controls benthic P regeneration while the role of redox cycling of iron is weak. The change in authigenic P (Pauth) with depth in the sediment and concomitant decrease in porewater dissolved inorganic phosphate (DIP), solid phase Pbio and organic P (Porg) content collectively indicate the transformation of P from labile phases to an authigenic phase. Molar Corg/Porg and Corg/Preactive ratios also support the notion of ongoing phosphogenesis in the area. The content of carbonate fluroapatite (CFA) is elevated especially in one of the three study sites as a result of in-situ precipitation and a contribution from eolian and water column authigenesis. The estimated burial efficiency of P at the sediment-water interface at two locations is only about 2%, which is much less than in the western Arabian Sea also indicating extensive P regeneration.
dc.language.isoen
dc.publisherElsevier
dc.relation.ispartofMar Chem
dc.relation.isreferencedbySCI
dc.titleBenthic cycling of phosphorus in the Eastern Arabian Sea: Evidence of present day phosphogenesis
dc.typeJournal Article
dc.affiliation.authorCSIR-National Institute of Oceanography, Dona Paula, Goa, India


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record