My research focuses on applied forest ecology. I seek solutions to environmental problems and ultimately the preservation of natural ecosystems. My interests include the response of species to climatic change, the conservation of rare species, and the biology of invasive or exotic species. I have also used simulation models to predict population changes for both Canada geese and whitebark pine. Diagram of stage-based demographic model for whitebark pine infected with white pine blister rust.
Arrows indicate the probability of transitioning from on life history stage to the next each year.
Growth increase, especially since 1950, corresponds with increasing CO2 concentrations suggesting a possible fertilization effect.