(1) Large-scale wind and fire in temperate and boreal forests; (2) European earthworm invasion in forests and the complex interactions with other invasive species and deer grazing; (3) Asian earthworm invasion in Minnesota; (4) Long-term dynamics of old-growth maple and hemlock forests in Upper Michigan; (5) Patterns of tree height in the eastern U.S.; (6) Conservation of biodiversity in fragmented forest landscapes; (7) Climate change, its influence on biome distributions and interactions with deer, fire and wind, insects and invasive species in forests.
