แปลบทความวิจัยshould promote understory vegetation and provide
a potential small mammal resource, though we
caution that this hypothesis requires further examination
of vole populations within managed stands.
Second, we supply logs at the ground level to further
increase habitat potential for voles, and allow marten
to access this prey resource in winter. Ultimately,
this type of stand-level management should be incorporated
into an overall landscape-level management
strategy (Bissonette et al., 1989). Our habitat
‘window’ should therefore occur during a reasonable
harvest rotation. In this example, we target the final
harvest at a dominant height of 17 m (Fig. 5).
The first objective is to increase the rate of stem
growth, so that sufficiently large logs will be available
for CWD, using a precommercial thinning. As
shown in Fig. 5, we target a quadratic mean diameter
(0,) of 15 cm as the tree size necessary to generate
logs of a reasonable size. Once trees reach the target
Dq, a second density manipulation analogous to a
commercial thinning will insure that the stand remains
outside the ZICM until harvest. A reduction
from 2200 to 1100 stems ha-’ will accomplish this
goal (Fig. 5). Subcanopy structure will be
created/enhanced if cut trees are left on the ground