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Associations between beetles and forest stand characteristics, as well as beetle diversity, were investigated for 41 forest stands in Nova Scotia, Canada. Over 200 morphospecies from 45 Families of beetles were caught using window flight-intercept traps. In both years, correspondence analysis revealed distinct groupings of softwood and hardwood stands based on species assemblages. Multiple regression analysis was used to determine associations between forest variables and total species richness. Analyses were conducted for all stands combined and for hardwood and softwood stands separately. Hardwood stands had greater beetle richness than softwood stands. Within hardwood stands, volume of intermediate-sized deadwood was the best predictor of total species richness. Within softwood stands, volume of well-decayed deadwood was the best predictor of total beetle richness. Deadwood volume was associated with stand age in softwoods, and it appears that over 140 years is required for deadwood volume to reach pre-disturbance levels. On a etudie des associations entre les coleopteres et les caracteristiques des peuplements ainsi que la diversite des coleopteres pour 41 peuplements de la Nouvelle-Ecosse, au Canada. Plus de 200 morpho-especes appartenant a 45 familles de coleopteres ont ete capturees a l’aide de pieges-fenetres. Pour les deux annees, des analyses de correspondance ont revele des regroupements distincts dans les peuplements de resineux et de feuillus, d’apres les assemblages d’especes. On s’est servi d’une analyse de regression multiple pour etablir des associations entre des variables des forets et la richesse totale en especes. Des analyses ont ete effectuees pour l’ensemble des1 peuplements et separement pour les peuplements de feuillus et pour les peuplements de resineux. La richesse en coleopteres etait plus grande dans les peuplements de feuillus, pour lesquels le volume de bois mort de taille moyenne constituait le meilleur indicateur de la richesse totale en especes. En ce qui concerne les peuplements de resineux, c’etait le volume de bois mort bien decompose qui etait le meilleur indicateur de la richesse totale en coleopteres. Dans le cas des resineux, le volume de bois mort etait associe a l’âge du peuplement, et il semble qu’il faille plus de 140 ans pour retrouver les niveaux pre-perturbation.

BEETLE DIVERSITY ASSOCIATED WITH FOREST STRUCTURE INCLUDING DEADWOOD IN SOFTWOOD AND HARDWOOD STANDS IN NOVA SCOTIA