Helen Baulch

Assistant Professor, School of Environment and Sustainability and Global Institute for Water Security

(306) 966-2549


  • Doctor of Philosophy in Environmental and Life Sciences, Trent University
  • Master of Science in Biological Sciences, University of Alberta
  • Honours Bachelor of Science in Biology, University of Waterloo

Research Interests

Water quality; aquatic ecology; global change; biogeochemical cycles; greenhouse gas emissions; eutrophication

Select Publications

  • Baulch, H.M., S. L. Schiff, R. Maranger and P.J. Dillon.  Nitrogen enrichment and the emissions of nitrous oxide from streams.  Global Biogeochemical Cycles (in press).
  • Baulch, H.M., P.J. Dillon, R. Maranger, and S. L. Schiff.  Budgeting N2O emissions from freshwater ecosystems: Revisiting the IPCC methodology.  Canadian Journal of Fisheries and Aquatic Sciences (in press).
  • Baulch, H.M., P.J. Dillon, R. Maranger and S.L. Schiff.  Diffusive and ebullitive fluxes of methane and nitrous oxide from streams: are bubble-mediated fluxes important?  Journal of Geophysical Research – Biogeosciences (in press). 
  • Baulch, H.M., S. Schiff, S. Thuss and P. J. Dillon. 2011. Isotopic character of N2O emitted from streams. Environmental Science and Technology 45: 4682-4688.  http://pubs.acs.org/doi/abs/10.1021/es104116a
  • Whitfield, C.J., J. Aherne, and H.M. Baulch.  Controls on greenhouse gas concentrations in polymictic headwater lakes in Ireland.  Science of the Total Environment (in press).  http://dx.doi.org/10.1016/j.scitotenv.2011.09.045
  • Whitehead, P.G., L. Jin, H.M. Baulch, D.A. Butterfield, S.K. Oni, P.J. Dillon, M. Futter, A.J. Wade, R. North and E.A. O’Connor.  Modelling phosphorus dynamics in multi-branch river systems: A study of the Black River, Lake Simcoe Canada.  Science of the Total Environment (accepted). 
  • Baulch, H.M., J. J. Venkiteswaran, P.J. Dillon and R. Maranger. 2010. Revisiting the application of open-channel estimates of denitrification. Limnology and Oceanography Methods. 8:202-215.  http://www.aslo.org/lomethods/free/2010/0202.pdf
  • Baulch, H.M., M.A. Turner, D.L. Findlay, R.D. Vinebrooke, and W.F. Donahue. 2009. Benthic algal biomass – measurement approaches and measurement error. Canadian Journal of Fisheries and Aquatic Sciences. 66: 1989-2001
  • Turner, M.A., H.M. Baulch, S.E.M. Kasian, D.L. Findlay, R.D. Vinebrooke and D.M. McNicol. 2009. Resilience and hysteresis in benthic algal associations of a boreal shield lake recovering from acidification. Canadian Journal of Fisheries and Aquatic Sciences 66: 1875-1891
  • Barlow-Busch, L., H.M. Baulch, and W.D. Taylor. 2006. Phosphate uptake by seston and epilithon in the Grand River, southern Ontario. Aquatic Sciences68: 181-192
  • Baulch, H.M., D.W. Schindler, M.A. Turner, D.L. Findlay, M.J. Paterson, and R.D Vinebrooke. 2005. Effects of temperature on benthic communities in a boreal lake: Implications of climate warming. Limnology and Oceanography 50 (5): 1377-1392.  www.aslo.org/lo/toc/vol_50/issue_5/1377.pdf
  • Reid, H., B. Pisupati, and H. Baulch. 2004. Biodiversity and climate change. Policy brief. Scidev.net. http://www.scidev.net/en/policy-briefs/how-biodiversity-and-climate-change-interact.html
  • Baulch, H.M., T.W. Nord, M.Y. Ackerman, J.D. Dale, R.R.O. Hazewinkel, D.W. Schindler and R.D. Vinebrooke. 2003. Climate warming experiments: design of a mesocosm heating system. Limnology and Oceanography Methods. 1:10-15. http://www.aslo.org/lomethods/free/2003/0010.pdf

Current Research

  • Understanding how declining periods of ice cover will affect lake biogeochemistry and ecology
  • Characterizing the importance of aquatic ecosystems in regional and global greenhouse gas budgets
  • Modelling catchment nutrient dynamics to understand current and future controls on nutrient concentrations in streams, and nutrient loads to downstream ecosystems
  • Understanding temporal changes in the role of lakes as sites of nutrient retention in the landscape