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dc.contributor.authorKerr, Jason G
dc.contributor.authorBurford, Michele
dc.contributor.authorOlley, Jon
dc.contributor.authorUdy, James
dc.date.accessioned2017-05-03T11:47:29Z
dc.date.available2017-05-03T11:47:29Z
dc.date.issued2011
dc.date.modified2013-05-29T02:49:09Z
dc.identifier.issn0168-2563
dc.identifier.doi10.1007/s10533-010-9422-9
dc.identifier.urihttp://hdl.handle.net/10072/36837
dc.description.abstractPhosphorus (P) is often a key limiting nutrient in freshwater systems, and excessive P can result in algal blooms, with flow-on effects to aquatic food webs. P sorption is an important process in aquatic and terrestrial ecosystems whereby phosphate (PO4 3-) is exchanged between liquid and solid phases. This study shows that differences in the concentration of PO4 3- in a subtropical river system during high and low flow can be attributed to differences in P sorption characterises of its catchment soils and sediments. The sediments have lower Equilibrium Phosphate Concentrations (EPC0) and higher binding energy (Kd); the surface soils have higher EPC0 and higher easily desorbed P (NH4Cl-P). A comparison of filterable reactive phosphorus (frP) in water samples collected at high and low flows, with soil and sediment EPC0, suggested that during event flows, the high EPC0 and NH4Cl-P of surface soils is producing a net movement of PO4 3- from the soil/sediment system into runoff and stream flow. At baseflow, there is more likely a net movement of PO4 3- into the riverbed sediments. This has important implications for management actions aimed at reducing P loads to river systems and downstream water storages, namely the need to increase the infiltration of rainfall to decrease the amount of PO4 3- being flushed from the surface soil.
dc.description.peerreviewedYes
dc.description.publicationstatusYes
dc.languageEnglish
dc.language.isoeng
dc.publisherSpringer
dc.publisher.placeNetherlands
dc.relation.ispartofstudentpublicationN
dc.relation.ispartofpagefrom73
dc.relation.ispartofpageto85
dc.relation.ispartofissue1-3
dc.relation.ispartofjournalBiogeochemistry
dc.relation.ispartofvolume102
dc.rights.retentionY
dc.subject.fieldofresearchOther chemical sciences
dc.subject.fieldofresearchGeochemistry
dc.subject.fieldofresearchEcology not elsewhere classified
dc.subject.fieldofresearchEnvironmental management
dc.subject.fieldofresearchcode3499
dc.subject.fieldofresearchcode3703
dc.subject.fieldofresearchcode310399
dc.subject.fieldofresearchcode4104
dc.titlePhosphorus sorption in soils and sediments: implications for phosphate supply to a subtropical river in southeast Queensland, Australia
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
gro.facultyGriffith Sciences, Griffith School of Environment
gro.date.issued2011
gro.hasfulltextNo Full Text
gro.griffith.authorBurford, Michele A.
gro.griffith.authorOlley, Jon M.


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