Stewart, Katherine

Assistant Professor

Katherine Stewart

Department of Soil Science
5E74 - 51 Campus Drive
Saskatoon, Saskatchewan, Canada
S7N 5A8

Phone: 306-966-1916


Academic Degrees

  • BSc., MSc., Lakehead University
  • PhD., University of Northern British Columbia

Current Teaching

  • Tox 400.3 - Quantitative Toxicology
  • SLSC 398.3 - Ecology and Practice of Terrestrial Restoration and Remediation
  • SLSC 990 - Soil Science Seminar

Current and Recent Research Projects

I examine biologically mediated nitrogen input and nitrogen cycling in arctic, alpine and boreal ecosystems to identify means of restoring sustainable pathways that promote long-term ecosystem health.  My research group works with belowground soil systems, early successional soil surface communities and native vascular plants allowing for an integrated approach to examining both the impact and remediation of contaminants in the environment.  Collaborating with industrial partners across northern Canada we work to develop soil amendment technology and practices for the reclamation and restoration of plant-soil systems impacted by hydrocarbons, heavy metals and herbicides.


Stewart, K.J.and Siciliano, S.D. 2015. Potential contribution of native herbs and biological soil crusts to restoration of the biogeochemical nitrogen cycle in mining impacted sites in northern Canada. Ecological Restoration 33: 30-42.

Harper, K.A, Macdonald, S.E., Mayerhofer, M.S., Biswas, S.R., Esseen, P-A., Hylander, K., Stewart, Mallik, A.U., Drapeau, P., Jonsson, B-G., Lesieur, D., Kouki, J. And Bergeron, Y. 2015. Edge influence on vegetation at natural and anthropogenic edges of boreal forests in Canada and Fennoscandia. Journal of Ecology 103: 550-562.

Stewart, K.J., Grogan, P., Coxson, D.S. and Siciliano, S.D. 2014. Topography as a key factor driving atmospheric nitrogen exchanges in arctic terrestrial ecosystems. Soil Biology and Biochemistry 70: 96-112.

Lamb, E.G., Mengersen, K.L., Stewart, K.J., Attanayake, U. and Siciliano, S.D. 2014. Spatially explicit structural equation modelling. Ecology 95: 2434-2442.

Stewart, K.J., Brummel, M.E., Coxson, D.S. and Siciliano, S.D. 2013. How is nitrogen fixation in the high arctic linked to greenhouse gas emissions? Plant and Soil 362: 215-229.