My research focuses on population dynamics and disturbance processes in forests, including their interaction with climate and land-use changes. My work primarily involves field studies and often applies tree-ring methods to address questions concerning past forest conditions and tree responses to disturbances.

In recent years, I have collaborated with others to study a range of wetter to drier forest types in western North America. Our study areas have included old-growth cedar-hemlock forests and declining yellow-cedar forests in coastal British Columbia and ponderosa pine forests on the Arizona Strip and Hualapai tribal lands in northwestern Arizona.

Ponderosa pine stand on the Hualapai tribal lands in northwestern Arizona.

Old-growth cedar-hemlock stand in coastal British Columbia in which processes of gap dynamics dominate the disturbance regime.

Me with a cross section from a petrified giant sequoia at the San Diego Natural History Museum.