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Liber, Karsten
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Academic Degrees
B.Sc., Ph.D. (Guelph)Current Teaching
TOX 321.3 Risk Assessment and Regulatory Toxicology
Current and Recent Research Projects
Toxicity of uranium to aquatic organisms, including toxicity to native species, significance of life stage and water quality characteristics, and routes and mechanisms of uptake.
Distribution, speciation and bioavailability of selenium in northern aquatic ecosystems.
Investigation of cause of benthic invertebrate community impairment at Canadian mine sites.
Alternative approaches to the derivation of sediment quality guidelines.
Assessment of leaching of toxic constituents from oil sands coke and associated implications for use of coke in aquatic reclamation landscapes.
Assessment of industrial impacts on aquatic ecosystems, including Investigations-of-Cause.
Toxicity of the insecticide imidacloprid to benthic macroinvertebrates and the influence of dissolved oxygen condition and other pesticides on toxicity.
Publications
Selected Publications
Wiramanaden, C.I.E., K. Liber and I.J. Pickering. 2010. Selenium speciation in whole-sediment using X-ray absorption spectroscopy and micro X-ray fluorescence imaging. Environ. Sci. Technol. 44: 5389-5394.
Puttaswamy, N. and K. Liber. 2010. Variation in toxicity response of Ceriodaphnia dubia to Athabasca oil sands coke leachates. Chemosphere. 80: 489-497.
Wiramanaden, C.I.E., E. Forster and K. Liber. 2010. Selenium distribution in a lake system receiving effluent from a metal mine and milling operation in northern Saskatchewan, Canada. Environ. Toxicol. Chem. 29: 1-11.
Muscatello, J.R. and K. Liber. 2009. Accumulation and chronic toxicity of uranium over different life stages of the aquatic invertebrate Chironomus tentans. Arch. Environ. Contam. Toxicol. 57:531-539.
Robertson, E. and K. Liber. 2009. Effect of sampling method on contaminant measurement in pore-water and surface water at two uranium operations: can method affect conclusions? Environ. Monit. Assess. 155:539-553.
deRosemond, S., Q. Xie and K. Liber. 2008. Arsenic concentration and speciation in five freshwater fish species from Back Bay near Yellowknife, NT, Canada. Environ. Monit. Assess. 147: 199-210.
Robertson, E. and K. Liber. 2007. Bioassays with caged Hyalella azteca to determine aquatic toxicity downstream of two Saskatchewan, Canada, uranium operations. Environ. Toxicol. Chem. 26: 2345-2355.
Liber, K., W. Goodfellow, P. den Besten, W. Clements, T. Galloway, A. Gerhardt, A. Green, and S. Simpson. 2007. In-situ-based effects measures: Consideration for improving methods and approaches. Integr. Environ. Assess. Manage. 3: 246-258.
Doig, L.E. and K. Liber. 2006. Influence of dissolved organic matter on nickel bioavailability and toxicity to Hyalella azteca in water-only exposures. Aquat. Toxicol. 76: 203-216.
de Rosemond, S.J.C. and K. Liber. 2004. Wastewater treatment polymers identified as the toxic component of a diamond mine effluent. Environ. Toxicol. Chem. 23: 2234-2242.
Irving, E.C., K. Liber and J.M. Culp. 2004. Lethal and sublethal effects of low dissolved oxygen condition on two aquatic invertebrates, Chironomus tentans and Hyalella azteca. Environ. Toxicol. Chem. 23: 1561-1566.
