Once a site is selected for surveying, it is important
to then consider where to place traps in relation to the
forest stand. Traps placed under a closed canopy or
along a forest edge were superior in terms of total
scolytids and cerambycids captured and average species
richness compared with traps placed in a clearing.
However, traps placed along an edge and in a clearing
had slightly higher numbers of species and unique
species captured than the closed canopy forest. Edge
habitats were the best in terms of capturing the largest
numbers of species and unique species and should be
selected whenever possible during an exotic bark and
woodborer survey. Although similar numbers were
also caught in traps in the clearings, other factors (e.g.,
amount of exposure, vandalism, foot trafÞc) make
placing traps on a forest edge where they can be
concealed a better option.
Acknowledgments
This work would not have been completed if not for the
efforts of Garret Dubois, Angela Maddux-Hammond, and
Molly Heuss (U.S. Forest Service) who helped with insect
collections, laboratory sorting, and identiÞcation. Rick Hoebeke
(Cornell University, Ithaca, NY) provided assistance
with identiÞcation of some beetles and conÞrmation of others.
Public Service of New Hampshire and Paula Duchano
allowed access to property for experiments. Dan Miller (U.S.
Forest Service) provided valuable comments on a draft version
of this manuscript