Dr. Mark Hanson

Associate Department Head

Associate Professor
Grad Chair
Department of Environment and Geography
252 Wallace
University of Manitoba
Winnipeg, Manitoba
R3T 2N2
(204) 474-9897
Fax: (204) 474-7699


Ph.D. University of Guelph
Postdoctoral Fellow INRA, France


Research Interests

Dr. Hanson’s research focuses on the response of freshwater organisms to various types of stressors, with a special emphasis on aquatic plants and invertebrates. The interactions between organisms and the way in which these can influence the stress response are studied at the laboratory and field-level.  This helps in our understanding and ability to predict the risk an exposure to a toxicant or change in water quality can provoke at the ecosystem-level. The use of microcosms, large-scale model freshwater ecosystems, is emphasized along with developing new methodologies to assess changes in water quality in a rapid and effective manner.


Recent Publications

Rodriguez-Gil, J. L., Lissemore, L., Solomon, K., and Hanson, M. 2016. Dissipation of a commercial mixture of polyoxyethylene amine surfactants in aquatic outdoor microcosms: Effect of water depth and sediment organic carbon. Science of the Total Environment. 550: 449-458.

Brooks, B., Fulton, B., and Hanson, M. 2015. Aquatic toxicology studies with macrophytes and algae should balance experimental pragmatism with environmental realism. Science of the Total Environment. 536: 406-407

Baxter L.R., Brain R.A., Hosmer, A., Nema, M., Muller, K., Solomon K.R., and Hanson M.L. 2015. Effects of atrazine on egg masses of the yellow-spotted salamander (Ambystoma maculatum) and its endosymbiotic alga (Oophila amblystomatis).  Environmental Pollution. 206: 324-321.

Anderson, J., Joudan, S., Shoichet, E., Cuscito, L., Alipio, A., Donaldson C., Khan S., Goltz, D., Knapp., C., Hanson, M.L. and Wong, C.  2015. Reducing nutrients, organic micropollutants, antibiotic resistance, and toxicity in rural wastewater effluent with subsurface filtration treatment technology.  Ecological Engineering.  84: 375-385.

Brown, A., Challis, J., Wong C. and Hanson, M.L. 2015. Selective serotonin reuptake inhibitors and β-blocker transformation products may not pose a significant risk of toxicity to aquatic organisms in wastewater effluent-dominated receiving waters.  Integrated Environmental Assessment and Management. 11(4):618-639.

Prosser, R., Brain, R.A., Andrus, M., Hosmer, A., Solomon, K.R. and Hanson, M.L. 2015.  Assessing temporal and spatial variation in sensitivity of field-derived periphyton communities to, and ability to recover from, atrazine exposure.  Ecotoxicology and Environmental Safety. 118: 204-216.

Van Der Kraak, G.J., Hosmer, A.J., Hanson, M.L., Kloas, W., and Solomon, K. R. 2014. Effects of atrazine in fish, amphibians, and reptiles: An analysis based on quantitative weight of evidence. Critical Reviews in Toxicology. 44(S5), 1-66.

Rodriguez-Gil J.L., Brain R.A., Baxter L.R., Ruffell, S., McConkey, B., Solomon K.R., and Hanson M.L. 2014. Optimization of culturing conditions for toxicity testing with the alga Oophila sp. (Chlorophyceae), an amphibian endosymbiont. Environmental Toxicology and Chemistry. 33(11): 2566-2575.



Courses Taught

ENVR 3180  Methods in Ecotoxicology (undergraduate level)
ENVR 4180  Ecotoxicological Risk Characterization (undergraduate level)
GEOG 7010  Ecotoxicological Risk Characterization (graduate level)
ENVR 2270  Environmental Problem Solving and Scientific Thinking (undergraduate level)