Morrissey, Christy

Associate Professor

Christy Morrissey

Department of Biology
University of Saskatchewan, 112 Science Place
Saskatoon, Saskatchewan, Canada
S7N 5E2

Phone: 306-966-4433



Current Courses

Current Courses

  • BIOL 121.3 Diversity of Life
  • BIOL 470.3 Conservation Biology
  • BIOL 410.3 Current Issues in Environmental Biology
  • ENVS 806.3: Field skills in Environment and Sustainability
  • BIOL 475.3 Ecological Toxicology (Next offering Jan 2020)
  • BIOL 898.3 Ecotoxicology: Theory and Practice (Next offering Jan 2020)

Research Interests

  • Pathways of contaminant exposure in avian wildlife
  • Assessing pesticide and other agricultural stressors on Prairie agroecosystems
  • Captive and field studies to assess contaminant effects on avian life cycles- particularly migration and reproduction
  • Freshwater ecotoxicology - direct and indirect effects of chemical stressors on stream and wetland communities and ecosystems


J Elliott, V Norbury, C Bishop, C Morrissey 2018. Using American dippers Cinclus mexicanus to investigate the influence of run-of-the-river dams on mercury exposure and food webs in mountain streams around the Salish Sea.

C Hao, ML Eng, F Sun, CA Morrissey 2018. Part-per-trillion LC-MS/MS determination of neonicotinoids in small volumes of songbird plasma. Science of The Total Environment 644, 1080-1087

VM Silverthorn, CA Bishop, JE Elliott, CA Morrissey 2018. An assessment of run-of-river hydroelectric dams on mountain stream ecosystems using the American dipper as an avian indicator. Ecological Indicators 93, 942-951

K Bianchini, CA Morrissey 2018. Polycyclic aromatic hydrocarbon exposure impairs pre-migratory fuelling in captively-dosed Sanderling (Calidris alba). Ecotoxicology and environmental safety 161, 383-391

EM Maloney, CA Morrissey, JV Headley, KM Peru, K Liber 2018. Can chronic exposure to imidacloprid, clothianidin, and thiamethoxam mixtures exert greater than additive toxicity in Chironomus dilutus? Ecotoxicology and environmental safety 156, 354-365

MC Cavallaro, K Liber, JV Headley, KM Peru, CA Morrissey 2018. Community‐Level and Phenological Responses of Emerging Aquatic Insects Exposed To Three Neonicotinoid Insecticides: An In Situ Wetland Limnocorral Approach. Environmental toxicology and chemistry

RL Stanton, CA Morrissey, RG Clark 2018. Analysis of trends and agricultural drivers of farmland bird declines in North America: A review. Agriculture, Ecosystems & Environment 254, 244-254

VM Silverthorn, CA Bishop, T Jardine, JE Elliott, CA Morrissey 2018. Impact of flow diversion by run‐of‐river dams on American dipper diet and mercury exposure. Environmental toxicology and chemistry 37 (2), 411-426

ML Eng, BJM Stutchbury, CA Morrissey 2017. Imidacloprid and chlorpyrifos insecticides impair migratory ability in a seed-eating songbird. Scientific Reports 7 (1), 15176

EM Maloney, CA Morrissey, JV Headley, KM Peru, K Liber 2017. Cumulative toxicity of neonicotinoid insecticide mixtures to Chironomus dilutus under acute exposure scenarios. Environmental toxicology and chemistry 36 (11), 3091-3101

R Stanton, RG Clark, CA Morrissey 2017. Intensive agriculture and insect prey availability influence oxidative status and return rates of an aerial insectivore. Ecosphere 8 (3)

AR Main, J Fehr, K Liber, JV Headley, KM Peru, CA Morrissey 2017. Reduction of neonicotinoid insecticide residues in Prairie wetlands by common wetland plants. Science of the Total Environment 579, 1193-1202

MC Cavallaro, CA Morrissey, JV Headley, KM Peru, K Liber 2017. Comparative chronic toxicity of imidacloprid, clothianidin, and thiamethoxam to Chironomus dilutus and estimation of toxic equivalency factors. Environmental toxicology and chemistry 36 (2), 372-382

VM Norbury, CA Bishop, TD Jardine, J Elliott, CA Morrissey 2017. Impacts of run-of-river hydropower on food web structure and mercury bioaccumulation in American dippers of coastal British Columbia.

NL Michel, AC Smith, RG Clark, CA Morrissey, KA Hobson 2016. Differences in spatial synchrony and interspecific concordance inform guild‐level population trends for aerial insectivorous birds. Ecography 39 (8), 774-786

RL Stanton, CA Morrissey, RG Clark 2016. Tree Swallow (Tachycineta bicolor) foraging responses to agricultural land use and abundance of insect prey. Canadian journal of zoology 94 (9), 637-642

D Gibbons, C Morrissey, P Mineau 2016. Erratum to: A review of the direct and indirect effects of neonicotinoids and fipronil on vertebrate wildlife. Environmental science and pollution research international 23, 947

AR Main, NL Michel, MC Cavallaro, JV Headley, KM Peru, CA Morrissey 2016. Snowmelt transport of neonicotinoid insecticides to Canadian Prairie wetlands. Agriculture, Ecosystems & Environment 215, 76-84

Main A.R., Michel N.L., Headley J.V., Peru K.M., and Morrissey C.A (in revision). Drivers of neonicotinoid insecticide detections and concentrations in Canada’s Prairie wetlands. Environmental Science and Technology.

Zahara, A.R.D., Michel, N.L., Flahr, L.M., Ejack, L.E., and C.A. Morrissey 2015. Latent cognitive effects from low-level PCB exposure in juvenile European starlings, Sturnus vulgaris. Environmental Toxicology and Chemistry DOI 10.1002/35c.3084

Michel, N.L., Smith, A., Clark, R.G.*, Hobson, K.A.*, and C.A. Morrissey (in review). Continental-scale analysis of population trends of aerial insectivores reveals diverse spatiotemporal patterns. Methods in Ecology and Evolution

Michel, N.L., Hobson, K.A., C.A. Morrissey, Clark, R.G. (in review). Climate variability explains most of the variation in population trends among North American aerial insectivorous birds. Nature Climate Change

Flahr, L.M., Michel, N.L., Zahara A.R.D., Jones, P.D., and C.A. Morrissey. 2015. Developmental exposure to Aroclor 1254 alters migratory behaviour in juvenile European starlings (Sturnus vulgaris). Environmental Science and Technology 49(10):6274-83.

Morrissey, C.A., Devries, J., Mineau, P., Sanchez-Bayo, F., Liess, M., Cavallaro, M., Liber, K. 2015. Neonicotinoid contamination of surface waters and relative risks to aquatic invertebrates: a review. Environment International 74:291-303.

Delso, N. and 29 others alphabetically (incl. Morrissey, C.A.). 2014. Systemic insecticides (neonicotinoids and fipronil): trends, uses, mode of action and metabolites. Environ Sci and Poll Res (special issue).  DOI 10.1007/s11356-014-3470-y

Pisa, L. and 17 others (incl Morrissey, C.A.) 2014. Effects of neonicotinoids and fipronil on non-target invertebrates. Environ Sci and Poll Res (special issue).  DOI 10.1007/s11356-014-3471-x

Changnon, M., Kreutzweiser D., Mitchell, E.A.D., Morrissey, C.A., Noome, D.A. and Van der Sluijs, J. 2014. Risks of large scale use of systemic insecticides to ecosystem functioning and services. Environ Sci and Poll Res (special issue).  DOI 10.1007/s11356-014-3277-x.

Van der Sluijs, J.P. and 29 others alphabetically (incl. Morrissey, C.A.) 2014.  Conclusions of the Worldwide Integrated Assessment on the risks of neonicotinoids and fipronil to biodiversity and ecosystem functioning. Environ Sci and Poll Res (special issue). DOI 10.1007/s11356-014-3229-5.

Gibbons, D., Morrissey, C.A., Mineau, P. 2014. A review of the direct and indirect effects of neonicotinoids and fipronil on vertebrate wildlife. Environ Sci and Poll Res (special issue).  DOI 10.1007/s11356-014-3180-5.

Morrissey C.A., Stanton D.W.G., Tyler C.R., Pereira M.G., Newton J., Durance I., Ormerod S.J. 2014. Developmental impairment in Eurasian dipper nestlings exposed to urban stream pollutants. Environ Toxicol Chem 33(6): 1315–1323.

Main A.R., Headley J.V., Peru K.M., Michel N.L., Cessna A.J., and Morrissey C.A. 2014. Widespread use and frequent detection of neonicotinoid insecticides in wetlands of Canada's prairie pothole region. PLoS ONE 9:e92821.

Cavallaro, M., Main, A.R., and Morrissey, C.A. 2014. Muskrat (Ondatra zibethicus) interference with aquatic invertebrate traps. Canadian Field Naturalist 128 (2):200-203.

Morrissey, C.A., Stanton, D.W.G., Pereira, D.G., Durance, I., Tyler, C.R., Ormerod, S.J. 2013. Eurasian dipper eggs indicate elevated organohalogenated contaminants in urban rivers. Environ Sci &Technol. 47 (15): 8931–8939.

Morrissey, C.A., Boldt, A., Mapstone, A., Newton, J. and S.J. Ormerod.  2013. Stable isotopes as indicators of wastewater effects on the macroinvertebrates of urban rivers. Hydrobiologia 700: 231-244.

Elliott, J.E., Levac, J., Guigueno, M.F., Shaw, P., Wayland, M., Morrissey, C.A., Muir, D.C.G., and K.H. Elliott. 2012. Factors influencing legacy pollutant accumulation in alpine osprey: biology, topography, or melting glaciers? Environmental Science and Technology 46(17):9681-89.

Morrissey, C.A., Pollet, I., Ormerod, S.J. and J.E. Elliott. 2012. American dippers indicate contaminant biotransport by Pacific salmon. Environmental Science and Technology 46 (2), pp 1153–1162

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