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Horticultural Use of Copper-Based Fungicides Has Not Increased Copper Concentrations in Sediments in the Mid- and Upper Yarra Valley |
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| Authors: | Adam M Wightwick George Croatto Suzanne M Reichman Neal W Menzies Vincent Pettigrove Graeme Allinson |
| Institution: | 1. School of Agriculture and Food Sciences, The University of Queensland, St Lucia, QLD, 4072, Australia 2. Co-operative Research Centre for Contamination Assessment and Remediation of the Environment (CRC CARE), Mawson Lakes, SA, 5095, Australia 3. Future Farming Systems Research, Department of Primary Industries, 2a Bellarine Highway, PO BOX 114, Queenscliff, VIC, 3225, Australia 4. Future Farming Systems Research, Department of Primary Industries, Ernest Jones Drive, Macleod, VIC, 3085, Australia 6. School of Civil, Environmental and Chemical Engineering, RMIT University, GPO Box 2476, Melbourne, VIC, 3001, Australia 5. Centre for Aquatic Pollution Identification and Management (CAPIM), Bio21 Institute, The University of Melbourne, 30 Flemington Road, Parkville, VIC, 3010, Australia 7. Melbourne Water, Research and Technology, PO Box 4342, Melbourne, VIC, 3001, Australia |
| Abstract: | The use of Cu-based fungicide can pose a risk to nearby surface water bodies due to the run-off of accumulated Cu from agricultural soils. In 2008, we conducted a reconnaissance survey of the presence and concentration of copper in sediments at 18 sites within the Yarra River Catchment, an important horticultural production system in south-eastern Australia. Observed Cu concentrations in sediment samples from the study sites (mean (95 % confidence interval) 12.0 (10.6–13.6)? mg/kg dry weight) were similar to the concentrations present in the samples from the reference sites (mean (95 % confidence interval) 12.0 (6.7–16.8)? mg/kg dry weight). The data on Cu and other metals in the sediments suggest that that there is unlikely to have been wide spread, diffuse, off-site transport of Cu from the soils of horticultural properties to nearby surface waterways in the Yarra River Catchment and that that observed sediment metal concentrations are unlikely to pose an ecological risk to sediment-dwelling organisms at the study sites. |
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