Journal article

Evaluating freshwater mining sediment toxicity in Tasmania: Achieving strong multiple lines of evidence

W Tyler Mehler, Bryant Gagliardi, Michael J Keough, Vincent Pettigrove



Mining-impacted aquatic systems could be at risk from an assortment of pollutants. The present study evaluated toxicity of mining site sediments from western Tasmania by conducting bioassays with two Australian freshwater species (Chironomus tepperi and Austrochiltonia subtenuis). The present study used multiple lines of evidence (LoE) to assess risk to aquatic biota and the potential sources of that risk at these sites using a sediment quality guideline (SQG) comparison approach (i.e. comparing chemical concentrations at the site (in this case metals, sulfate, and acidic pH) to sediment guideline values) as well as a statistical approach (principle component analysis). Five of the nine mini..

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University of Melbourne Researchers


Funding Acknowledgements

We would like to thank S. Ware, R. Bhavara, and the rest of the Filchemand Lanxess teamfor providing assistance as well as generously donating samples of Lewatit MonoPlus TP 207 and Lewatit A365. We would also like to express our gratitude to J. You and H. Li for conversations and insight regarding themanuscript. Also, we would like to give a special thanks to Simon Sharp for laboratory and field assistance. This work was partially funded by the Holsworth Wildlife Research Endowment and the Albert Shimmins Fund. The authors have no competing interest to declare.