Infrastructure within eastern boreal forests of Quebec affects native woodborer composition but may not serve as a pathway of introduction for non-native species

Infrastructure including sawmills, mines and campgrounds can facilitate introduction of invasive woodborers through importation of equipment in solid wood packing or transport of infested firewood. We sampled woodborers near 11 sawmills, 10 mines, 11 campgrounds (11) in 12 national parks/faunal reserves throughout northwestern Quebec using fluon treated lindgren funnels baited with ‘super-lure’ pheromone blends (Monochamol, fuscamol, fuscamol acetate, UHR EtOH, and α-pinene) in 2021 and again in 2022. In 2021, we collected a total of 11 286 longhorns representing 36 species but did not collect any non-native longhorn beetle species. Infrastructure did affect native woodborers. Seven species including Tetropium cinnamopterum, Clytus ruricola, Acmaeops proteus proteus, Rhagium inquisitor, Monochamus notatus, Tetropium schwarzianum and Xylotrechus undulatus were more abundant near sawmills than in parks/reserves. Four species including Monochamus mutator, Monochamus marmorator, Acmaeops proteus proteus and Asemum striatum were more abundant near mines than parks/reserves. A single Tetropium species was more abundant in campgrounds than in parks/reserves. Based on these preliminary results, sawmills, mines and campgrounds do not appear to be important points for the introduction and establishments of invasive woodborers. At this point, however, we are not however able to distinguish whether this is related to lack of an invasion pathway which limits introductions or resistance from native woodborers that limits establishment.