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dc.contributor.authorBahadori, Mohammaden_US
dc.contributor.authorChen, Chengrongen_US
dc.contributor.authorLewis, Stephenen_US
dc.contributor.authorRezaei Rashti, Mehranen_US
dc.contributor.authorCook, Freemanen_US
dc.contributor.authorParnell, Andrewen_US
dc.contributor.authorEsfandbod, Maryamen_US
dc.contributor.authorBoyd, Sueen_US
dc.date.accessioned2019-06-06T01:32:37Z
dc.date.available2019-06-06T01:32:37Z
dc.date.issued2018en_US
dc.identifier.issn0048-9697en_US
dc.identifier.doi10.1016/j.scitotenv.2018.11.084en_US
dc.identifier.urihttp://hdl.handle.net/10072/381262
dc.description.abstractDetermining the source of sediments and associated nutrients from terrestrial to aquatic environments is critical for managing the detrimental impacts of soil erosion and loss of nutrients from terrestrial into aquatic environment. However, tracing the source of particulate nutrients from different land uses has not been adequately carried out due to methodological difficulties in separating sources, particularly in the Great Barrier Reef (GBR) catchment. The objective of this study was to develop a method to differentiate the sources of particulate nutrients from soils collected from different land uses (combination of beef and dairy grazing, sugarcane, forest and banana) using both geochemical and isotopic signatures. In order to select a discriminative group of signatures, all soil samples collected from each of the land use areas were fractionated to <63 μm size fraction and were analysed for both isotopic (δ13C, δ15N) and acid extractable geochemical properties (e.g. Zn, Pt and S). Considering the fact that the outcome of tracing models often depends on the type and robustness of the methods used, here we have employed a stable isotope mixing model (SIAR) to evaluate if the suite of selected elements could be used to estimate the relative contribution of different sources for a series of five virtually created sediment mixtures. For the five groups of virtual sediments, the SIAR model provided close estimates to the contribution values of sediment sources with the Mean Absolute Error (MAE) varying from 0.30 to 2.88%. Results from this study show for the first time that the combined use of isotopic and geochemical signatures enable the SIAR model to provide an accurate estimation of source apportionment where a variety of land uses needs to be investigated and shows promise as a valuable new sediment and particulate nutrient tracing tool.en_US
dc.description.peerreviewedYesen_US
dc.languageEnglishen_US
dc.publisherElsevieren_US
dc.publisher.placeNetherlandsen_US
dc.relation.ispartofpagefrom1en_US
dc.relation.ispartofpageto30en_US
dc.relation.ispartofjournalScience of the Total Environmenten_US
dc.subject.fieldofresearchEnvironmental Sciences not elsewhere classifieden_US
dc.subject.fieldofresearchMultidisciplinaryen_US
dc.subject.fieldofresearchcode059999en_US
dc.subject.fieldofresearchcodeMDen_US
dc.titleA novel approach of combining isotopic and geochemical signatures to differentiate the sources of sediments and particulate nutrients from different land usesen_US
dc.typeJournal articleen_US
dc.type.descriptionC1 - Articlesen_US
dc.type.codeC - Journal Articlesen_US
dcterms.licensehttp://creativecommons.org/licenses/by-nc-nd/4.0/en_US
dc.description.versionPost-printen_US
gro.facultyGriffith Sciences, School of Environment and Scienceen_US
gro.rights.copyright© 2018 Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Licence which permits unrestricted, non-commercial use, distribution and reproduction in any medium, providing that the work is properly cited.en_US
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