EFFECTS OF CLEAR-CUTTING AND PLANT COMPETITION CONTROL METHODS ON CARABID (COLEOPTRA: CARABIDAE) ASSEMBLAGES IN NORTHWESTERNS ONTARIO

摘要

Total captures, species richness, diversity,a nd assemblages of adult carabids (Coleoptera: Carabidae) in a boreal mixed-wood ecosystem study were comapred among unharvested,a nd clearcut plots untreated or treated with herbicides (Vision and Relase), mechanical treatments (brush saw and Silvana Selective). Carabids were sampled using unbaited pitfall traps for one growing season 7 and 9 years after clear-cutting, in the second growing season after compettion control was applied. A total of 5032 individulas representing 30 species were collected between June 1 and September 25, 1995. Total catches were no affected by the harvest or the conifer release alternatives applied. Species richness and diversity increased following conifer release alternatives. Ten species showed habitat preferences after treatment whereas the remaining 20 species were not significantly affected by treatment.