We use a variety of tools – observational field studies, manipulative experiments in the lab and field, ecological and simulation modeling, population genetic, and genomic approaches – to forge a deeper understanding of the ecology and evolution of forest insects, microbes and trees, particularly in the context of biological invasion.  Principal themes of our research include:
Global connectivity and invasion biology
Patterns and consequence of global
connectivity in invasive populations
Novel assemblages in a connected world
Novel associations and communities in
forest and plantation ecosystems
Neonectria perethecia on Fagus grandifolia
Community variation and landscape genetics 
in the beech bark disease pathogen complex
Bark beetle gallery
Community consequences of native
insect range shifts  
Emerald ash borer in New Hampshire
Biological control of Emerald ash borer:
Understanding drivers to predict outcomes
  Chysomelid beetle larvae feeding
Plant-insect interactions; biodiversity of
insects and fungi in forest ecosystems