dc.contributor.author | Linsy, P. | |
dc.contributor.author | Nath, B.N. | |
dc.contributor.author | Mascarenhas-Pereira, M.B.L. | |
dc.contributor.author | Vinitha, P.V. | |
dc.contributor.author | Ray, D. | |
dc.contributor.author | PrakashBabu, C. | |
dc.contributor.author | Rao, B.R. | |
dc.contributor.author | Kazip, A. | |
dc.contributor.author | Sebastian, T. | |
dc.contributor.author | Kocherla, M. | |
dc.contributor.author | Miriyala, P. | |
dc.date.accessioned | 2018-06-06 | |
dc.date.accessioned | 2018-10-23T09:24:46Z | |
dc.date.available | 2018-02-20 | |
dc.date.available | 2018-10-23T09:24:46Z | |
dc.date.issued | 2018 | |
dc.identifier.citation | Marine Chemistry, vol.199; 2018; 53-66 | |
dc.identifier.issn | 0304-4203 | |
dc.identifier.uri | https://doi.org/10.1016/J.MARCHEM.2018.01.007 | |
dc.identifier.uri | http://drs.nio.org/drs/handle/2264/7715 | |
dc.description.abstract | Results 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.iso | en | |
dc.publisher | Elsevier | |
dc.relation.ispartof | Mar Chem | |
dc.relation.isreferencedby | SCI | |
dc.title | Benthic cycling of phosphorus in the Eastern Arabian Sea: Evidence of present day phosphogenesis | |
dc.type | Journal Article | |
dc.affiliation.author | CSIR-National Institute of Oceanography, Dona Paula, Goa, India | |