A challenge facing forest managers is providing habitats for wildlife L'Baboration d'habitats associ6s aux fo&b matures ou aux vieilles associated with mature or old-growth forests. One approach is to for6ts constitue un d6fi auquel font face les amknagistes forestiers. use partial cutting which maintains forest cover while still allowUne approche repose sur l'utilisation de la coupe partielle qui pering timber harvest. We compared small mammal (voles, mice and met de maintenir le couvert forestier tout en rCcoltant de la shrews) and bird abundance after two intensities of partial cutmatikre ligneuse. NOUS avons compar6 l'abondance des petits mamting (30% and 60% volume removal) . We concluded that both of the partial cutting treatments familier (Spizella passerina) se retrouvaient exclusivement dans ~rovidedhabitat for small r~~ammals and birds typical of mature 1es coupes h blanc. Les quelques peupliers et bouleaux laiss6s dans forest, although the heavy removal began to show a shift towards dew des coupes 2 blanc furent utilis&s par les oiseaux nicheurs dans species typical of clearcuts. Because no single treatment was optides cavitAs, soit le pic h poitrine rouge (Sphyrapicus ruber), le pic ma1 for all species, we recommend that partial cutting be part of chevelu (Picoides villosus) et l'hirondelle bicolore (Tachycineta a landscape strategy to provide a range of habitat conditions simbicolor). Nous concluons que les deux coupes partielles proilar to those occurring under natural disturbance regimes. curent un habitat aux petits mammifkres et oiseaux semblables B ce qu'on retrouve en forst mature, m6me si la coupe plus intense Key words: Partial cutting, clearcutting, silvicultural systems, tend h indiquer un changement vers des e s w s typiques des coupes wildlife habitat, biodiversity, ecosystem management, birds, B blanc. C o m e aucun traitement n'a 6tB le meilleur pour toutes small mammals les espkes, nous recornmandons que la coupe partielle soit un 616-ment de I'amCnagement des paysages constituant un Bventail de conditions se rapportant B l'habitat semblable 21 ce qu'on retrouve suite 2 des r6gimes de perturbation naturelle.

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Based on relative abundance data, partial cutting has been suggested as a technique to maintain habitat for birds associated with late-seral forests, but there has been little study of partial cutting effects on nesting success. One of the primary limitations to nesting success is nest predation. We compared predation rates (proportion of nests disturbed in a 14-day period) in partially cut (30 or 60% basal area removal), clearcut, and uncut forests in northwestern British Columbia, in two experiments using ground-placed (1993) and shrub-placed (1998) artificial nests. In the ground-nest experiment there was a very low predation rate (0.06) and no detectable difference among treatments (p = 0.403). In the shrub-nest experiment, there was a 0.36 predation rate and little evidence of treatment differences (p = 0.295). Based on 90% confidence intervals for differences in observed predation rate, the 30% removal clearly did not increase predation risk relative to uncut forest. With the 60% removal, however, we cannot rule out a possible increase in predation risk compared with either uncut forest or clearcuts.