Home > Our Offices > Departments > Entomology > Research > Decomposition of Douglas-fir logs as affected by different initial communities of bark beetles, ambrosia beetles and fungi and by moisture content A National Science Foundation supported study of decomposition of Douglas-fir logs as affected by different initial communities of bark beetles, ambrosia beetles and fungi and by moisture content. Canopy Arthropod Response Study Data from a National Science Foundation supported long term study of canopy arthropod responses to different forest structures in conifer forests at or near the H.J. Andrews Experimental Forest Long Term Ecological Research (LTER) Site in western Oregon.