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Phosphorus speciation in the sediment and mass balance for the central region of the Great Barrier Reef continental shelf (Australia)

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dc.contributor Australian Institute Of Marine Science
dc.contributor Univ Plymouth
dc.contributor University Of Plymouth
dc.contributor Beach
dc.contributor Australian Inst Marine Sci
dc.contributor Australian Institute Of Marine Science (aims) en
dc.contributor.author PFITZNER, J.
dc.contributor.author MONBET, PH.
dc.contributor.author BRUNSKILL, G. J.
dc.contributor.author ZAGORSKIS, I.
dc.date.accessioned 2013-02-28T06:43:03Z
dc.date.accessioned 2017-03-21T00:58:53Z
dc.date.accessioned 2013-02-28T06:43:03Z
dc.date.accessioned 2018-11-01T03:05:22Z
dc.date.available 2017-03-21T00:58:53Z
dc.date.available 2017-03-21T00:58:53Z
dc.date.available 2013-02-28T06:43:03Z
dc.date.available 2018-11-01T03:05:22Z
dc.date.issued 2007-06-01
dc.identifier 7448 en
dc.identifier.citation Monbet P, Brunskill GJ, Zagorskis IE and Pfitzner J (2007) Phosphorus speciation in the sediment and mass balance for the central region of the Great Barrier Reef continental shelf (Australia). Geochimica et Cosmochimica Acta. 71: 2762 2779. en
dc.identifier.issn 0016-7037
dc.identifier.uri http://epubs.aims.gov.au/11068/7448
dc.description Link to abstract/full text - http://dx.doi.org/10.1016/j.gca.2007.03.025 en
dc.description.abstract Solid phase P speciation has been determined in sediments from a transect across the central section of the continental shelf and slope of the Great Barrier Reef (GBR) lagoon. This region is characterized by a gradient of riverine aluminosilicate clay and silt nearshore, seawards of which biogenic carbonate sediment predominates. Phosphorus speciation results show large variations along this transect. Organic P and authigenic (apatite) P are the major chemical forms of phosphorus in the central GBR continental shelf sediments. Post-depositional reorganization of P was also observed, converting organic P and iron bound P (Fe-P) to authigenic (apatite) P. Phosphorus burial rate was estimated from measurements of total P concentration and excess (210)Pb sediment mass accumulation rates. Burial efficiency varies significantly over the shelf. Inshore areas showed significant P remobilization from sediments to the water column (up to similar to 50%). The mid and the outer shelf showed little evidence for remobilization (except for coral reef platform sediments), with more of the sediment P being in the less reactive authigenic apatite phases. An appreciable fraction of this non-labile authigenic apatite phase was identified as fish bone. P sources and sinks over the central part of the GBR shelf were quantified using a mass balance approach. This showed that Coral Sea shelf edge upwelling events are essential to satisfy the large P nutrient demand of the whole GBR lagoon. P inputs due to upwelling events were greater than those contributed by local rivers over an average year. (c) 2007 Elsevier Ltd. All rights reserved.
dc.description.uri http://dx.doi.org/10.1016/j.gca.2007.03.025 en
dc.language English
dc.language en en
dc.relation.ispartof Geochimica et Cosmochimica Acta - pages: 71: 2762 2779 en
dc.relation.ispartof Null
dc.subject N-p Ratios
dc.subject Marine-sediments
dc.subject Mangrove Rhizophora-apiculata
dc.subject Organic-matter
dc.subject Community Structure
dc.subject Coral-reef
dc.subject Geochemistry & Geophysics
dc.subject North-sea
dc.subject Water-column
dc.subject Phytoplankton Dynamics
dc.subject Heavy-metals
dc.title Phosphorus speciation in the sediment and mass balance for the central region of the Great Barrier Reef continental shelf (Australia)
dc.type journal article en
dc.identifier.doi 10.1016/j.gca.2007.03.025
dc.identifier.wos WOS:000247087100008


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