A combined multidisciplinary kinetic modeling approach for determination of coastal ecosystem contaminant fluxes

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dc.contributor.authorSzymczak, Ren_AU
dc.contributor.authorTwining, JRen_AU
dc.contributor.authorHollins, SEen_AU
dc.contributor.authorMazumder, Den_AU
dc.contributor.authorCreighton, NMen_AU
dc.date.accessioned2021-03-08T04:16:24Zen_AU
dc.date.available2021-03-08T04:16:24Zen_AU
dc.date.issued2006-08-26en_AU
dc.date.statistics2021-03-05en_AU
dc.description.abstractThe historical operation of manufacturing, chemical and other industries in the Sydney Harbour catchment over many decades has left a legacy of high chemical contamination in the surrounding catchment. These contaminants are now seriously impacting on incident commercial fisheries and public utilisation of estuarine resources. Elucidation of environmental processes is the key to effective ecosystem management, however few tools are available to predict their inter-relationships, rates and directions. This work seeks to combine GIS, contaminant transport, ecological, and bioaccumulation models to improve the accuracy and specificity of a probabilistic ecological risk assessment strategy. This study has four components: (1) determination of chemical linkages between high trophic order species and different habitats resources using stable isotopic analyses of carbon and nitrogen. These studies identify trophic cascades forming the basis for selection of biota for contaminant transfer experiments; (2) short-term (weeks – months) chronology and geochemistry of sediment cores and traps in Homebush Bay to determine rates of sedimentation and resuspension (using environmental/cosmogenic 7-Be). Models derived from these studies provide the contaminants levels against which risk is assessed; (3) biokinetic studies using proxy radiotracer isotopes (eg. 75-Se & 109-Cd for analogous stable metals) of the uptake and trophic transfer of contaminants by specific estaurine biota. Here we identify the rates and extent to which contaminants accumulated and transferred to predators/seafoods; and (4) application of a probabilistic ecological risk assessment model (AQUARISK) set to criteria determined by stakeholder consensus. Here we report initial results of the distribution of natural isotopes and redistribution of artificial isotopes injected into ecological compartments to determine the key trophic linkages, contaminant pathways and their rates in temperate estuarine systems of Sydney Harbour & Botany Bay (Australia).en_AU
dc.identifier.citationSzymczak, R., Twining, J., Hollins, S., Mazumder, D., & Creighton, N. (2006). A combined multidisciplinary kinetic modeling approach for determination of coastal ecosystem contaminant fluxes. Paper presented to the 16th Annual V.M. Goldschmidt Conference : Geochemistry Downunder : 27 August- 1 September 2006, Melbourne Exhibition and Convention Centre, Melbourne, Australia.en_AU
dc.identifier.conferenceenddate1 September 2006en_AU
dc.identifier.conferencename6th Annual V.M. Goldschmidt Conference (Goldschmidt 2006) - 'Geochemistry downunder',en_AU
dc.identifier.conferenceplaceMelbourne, Australiaen_AU
dc.identifier.conferencestartdate27 August 2006en_AU
dc.identifier.urihttps://goldschmidtabstracts.info/abstracts/abstractView?id=2006000542en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/10495en_AU
dc.language.isoenen_AU
dc.publisherGoldschmidten_AU
dc.subjectNew South Walesen_AU
dc.subjectAustraliaen_AU
dc.subjectManufacturingen_AU
dc.subjectIndustryen_AU
dc.subjectContaminationen_AU
dc.subjectEstuariesen_AU
dc.subjectFishing industryen_AU
dc.subjectEcologyen_AU
dc.subjectRisk assessmenten_AU
dc.subjectBiological accumulationen_AU
dc.subjectHarborsen_AU
dc.titleA combined multidisciplinary kinetic modeling approach for determination of coastal ecosystem contaminant fluxesen_AU
dc.typeConference Abstracten_AU
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