Dalhousie University, BSc, Honours
Dalhousie University, MES
University of Toronto, 1987, PhD


I have been working to understand the consequences of environmental change, driven by the changing climate, on Arctic tundra ecosystems through long-term observations and field experiments. Studies of plant growth, phenology and reproduction, biodiversity responses, biotic interactions, evolutionary and migration potential of plant species, carbon and nutrient fluxes, and effects of permafrost disturbance form the basis of investigations by my group. We also work in Arctic communities to help northern students understand and interpret observations of environmental change by elders through shared field and class experiences and participation in science-based projects on berry producing shrub species.


ELMENDORF, S.C., HENRY, G.H.R., HOLLISTER, R.D., FOSAA, A.M., GOULD, W.A., HERMANUTZ, L., HOFGAARD, A., JÓNSDÓTTIRI, I., JORGENSON, J.C., LÉVESQUE, E., MAGNUSSON, B., MOLAU, U., MYERS-SMITH, I.H., OBERBAUER, S.F., RIXEN, C., TWEEDIE, C.E., and WALKER, M. 2015 ‘Experiment, monitoring, and gradient methods used to infer climate change effects on plant communities yield consistent patterns’ Proceedings of the National Academy of Sciences of the U.S.A. 112, 448-452



BOULANGER-LAPOINTE, N., LÉVESQUE, E., BOUDREAU, S., HENRY, G.H.R., and SCHMIDT, N.M. 2014 ‘Population structure and dynamics of Arctic willow (Salix arctica) in the High Arctic’ Journal of Biogeography 41, 1967-1978



HENRY, G.H.R., HARPER, K.A., CHEN, W., DESLIPPE, J.R., GRANT, R.F., LAFLEUR, P.M., LÉVESQUE, E., SICILIANO, S.D., SIMARD, S.W. 2012 ‘Effects of observed and experimental climate change on terrestrial ecosystems in northern Canada: results from the Canadian IPY program’ Climatic Change 115, 207-234

ELMENDORF, S.C., HENRY, G.H.R., HOLLISTER, R.D., et al. (48 authors) 2012 ‘Plot-scale evidence of tundra vegetation change and links to recent summer warming’ Nature Climate Change 2, 453-457

WALKER, X.A., HENRY, G.H.R., MCLEOD, K., HOFGAARD, A. 2012 ‘Reproduction and establishment of Picea glauca across the northernmost forest-tundra region in Canada’ Global Change Biology 18, 3202-3211

ELMENDORF, S.C., HENRY, G.H.R., HOLLISTER, R.D., BJÖRK, R.G., BJORKMAN, A.D., et al. (41 authors) 2012 ‘Global assessment of experimental climate warming on tundra vegetation: heterogeneity over space and time’ Ecology Letters 15(2), 164–175

RAYBACK, S.A., HENRY, G.H.R. and LINI, A. 2012 ‘Multiproxy reconstructions of climate for three sites in the Canadian High Arctic using Cassiope tetragona’ Climatic Change DOI 10.1007/s10584-012-0431-7



CALLAGHAN, T.V., TWEEDIE, C.E., ÅKERMAN, J., ANDREWS, C., BERGSTEDT, J., BUTLER, M.G., CHRISTENSEN, T.R., COOLEY, D., DAHLBERG, U., DANBY, R.K., DANIËLS, F.J.A., DE MOLENAAR, J.G., DICK, J., EBBE MORTENSEN, C., EBERT-MAY, D., EMANUELSSON, U., ERIKSSON, H., HEDENÅS, H., HENRY, G.H.R., HIK, D.S., HOBBIE, J.E., JANTZE, E.J., JASPERS, C., JOHANSSON, C., JOHANSSON, M., JOHNSON, D.R., JOHNSTONE, J.F., et al. (24 authors) 2011 ‘Multi-decadal Changes in Tundra Environments and Ecosystems: Synthesis of the International Polar Year – Back to the Future Project (IPY-BTF)’ Ambio 40, 705-716

LAMB, E.G., HAN, S., LANOIL, B.D., HENRY, G.H.R., BRUMMELL, M.E., BANERJEE, S., and SICILIANO, S.D. 2011 ‘A High Arctic soil ecosystem resists long-term environmental manipulations’ Global Change Biology 17, 3187–3194

RAYBACK, S.A., LINI, A. and HENRY, G.H.R. 2011. ‘Spatial variability of the dominant climate signal in Cassiope tetragona from sites in Arctic Canada’ Arctic 64, 98-114

ELLIOTT, T.L. and HENRY, G.H.R. 2011 ‘Effects of simulated grazing in ungrazed wet sedge tundra in the High Arctic’ Arctic, Antarctic and Alpine Research 43, 198-206

KLADY, R.K., HENRY, G.H.R. and LEMAY, V. 2011 ‘Changes in High Arctic tundra plant reproduction in response to long-term experimental warming’ Global Change Biology 17, 1611–1624

HILL, G. and HENRY, G.H.R. 2011 ‘Responses of High Arctic wet sedge tundra to climate warming since 1980’ Global Change Biology 17, 276–287 DOI 10.1111/j.1365-2486.2010.02244.x



CHEN, Z., CHEN, W., LEBLANC, S.G. and HENRY, G.H.R. 2010 ‘Digital photograph analysis for measuring percent plant cover in the Arctic’ Arctic 63, 315-326

HUDSON, J.G.M., HENRY, G.H.R. and CORNWELL, W.K. 2010 ‘Taller and larger: shifts in Arctic tundra leaf traits after 16 years of experimental warming’ Global Change Biology DOI 10.1111/j.1365-2486.2010.02294.x

HUDSON, J.M.G. and HENRY, G.H.R. 2010 ‘High Arctic plant community resists 15 years of experimental warming’ Journal of Ecology 98, 1035–1041. This paper was featured in the Research Highlights section of Nature 466, 534 (29 July 2010)

LANTZ, T.C., GERGEL, S.E. and HENRY, G.H.R. 2010 ‘Response of green alder (Alnus viridis subsp. fruticosa) patch dynamics and plant community composition to fire and regional temperature in north-western Canada’ Journal of Biogeography 37, 1597-1610

TREFRY, S.A., FREEDMAN, B., HUDSON, J.M.G. and HENRY, G.H.R. 2010 ‘Breeding bird surveys at Alexandra Fiord, Ellesmere Island, Nunavut (1980-2008)’ Arctic 63, 308-314

Winter 2018

GEOB307 Biogeography and Global Change Sections

Biogeographic concepts in understanding responses in ecosystems to environmental change at global, regional, and local scales. Conservation issues such as the loss of biodiversity and endangered species.

Winter 2018

GEOB500 Contemporary Research Trends in Physical Geography Sections

Winter 2018

GEOB505 Permafrost Sections

Winter 2018

GEOG311 Urban Environments Sections

The impact of urban development on the natural environment and vice versa. Study of the ecology and metabolism of cities and green urban design, using global and local case studies.

Winter 2018

GEOG497 The Arctic Sections

Physical and biological characteristics of the circumpolar Arctic, emphasizing terrestrial environments and the impacts on and by humans, including: glacial history; climatology; biogeography/ecology of arctic tundra; human-environment interactions, settlement and exploration; and current environmental, social and economic problems.