Challenges in understanding the sources of bioaccumulated metals in biota inhabiting turbid river systems

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dc.contributor.authorCresswell, Ten_AU
dc.contributor.authorSmith, REWen_AU
dc.contributor.authorSimpson, SLen_AU
dc.date.accessioned2016-07-04T04:37:49Zen_AU
dc.date.available2016-07-04T04:37:49Zen_AU
dc.date.issued2014-01en_AU
dc.date.statistics2016-07-07en_AU
dc.description.abstractBioaccumulation of As, Cd, Cu, Pb and Zn by Macrobrachium prawns was observed to occur in the Strickland River downstream of a gold mine at Porgera, Papua New Guinea. This was despite the total metal concentrations of waters and sediments indicating no difference from reference sites within tributaries. To provide information on potential sources and bioavailability of metals to prawns, an extensive range of analyses were made on waters, suspended solids, deposited sediments and plant materials within the river system. Dissolved metal concentrations were mostly sub-micrograms per liter and no major differences existed in concentrations or speciation between sites within the Strickland River or its tributaries. Similarly, no differences were detected between sites for total or dilute acid-extractable metal concentrations in bed sediments and plant materials, which may be ingested by the prawns. However, the rivers in this region are highly turbid and the dilute acid-extractable cadmium and zinc concentrations in suspended solids were greater at sites in the Strickland River than at sites in tributaries. The results indicated that mine-derived inputs increased the proportion of these forms of metals or metalloids in the Strickland River. These less strongly bound metals and metalloids would be more bioavailable to the prawns via the dietary pathway. The results highlighted many of the difficulties in using routine monitoring data without information on metal speciation to describe metal uptake and predict potential effects when concentrations are low and similar to background. The study indicated that the monitoring of contaminant concentrations in organisms that integrate the exposure from multiple exposure routes and durations may often be more effective for detecting impacts than intermittent monitoring of contaminants in waters and sediments. © 2020 Springer Nature Switzerland AG.en_AU
dc.identifier.citationCresswell, T., Smith, R. E. W., & Simpson, S. L. (2014). Challenges in understanding the sources of bioaccumulated metals in biota inhabiting turbid river systems. Environmental Science and Pollution Research, 21(3), 1960-1970. doi:10.1007/s11356-013-2086-yen_AU
dc.identifier.govdoc6786en_AU
dc.identifier.issn0944-1344en_AU
dc.identifier.issue3en_AU
dc.identifier.journaltitleEnvironmental Science and Pollution Researchen_AU
dc.identifier.pagination1960-1970en_AU
dc.identifier.urihttp://dx.doi.org/10.1007/s11356-013-2086-yen_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/7138en_AU
dc.identifier.volume21en_AU
dc.language.isoenen_AU
dc.publisherSpringer Linken_AU
dc.subjectFresh wateren_AU
dc.subjectBiological evolutionen_AU
dc.subjectMiningen_AU
dc.subjectSolubilityen_AU
dc.subjectMetalsen_AU
dc.subjectZincen_AU
dc.titleChallenges in understanding the sources of bioaccumulated metals in biota inhabiting turbid river systemsen_AU
dc.typeJournal Articleen_AU
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