Balsam fir and red maple were browsed much more intensively than mountain maple, indicating a greater preference.
Eastern hemlock had a low availability, yet ranked second in contributing to moose diets and was the most intensively browsed species.
Under this latter situation the CAG on twigs may be much larger in effect decreasing the amount of twig in excess of the CAG that may be browsed.
Trace amounts of white spruce have been recorded in winter moose diets in Maine (Ludewig and Bowyer 1985) and on Isle Royale even though it had sufficient nutritional quality to be heavily browsed (Belovsky 1981).
1998), except when a food species is rare, whereupon it is heavily and repeatedly browsed (Brandner et al.
Long shoot dry mass, leaf dry mass, leaf number, leaf area, and chlorophyll and N content of leaves on long shoots are higher on moderately browsed B.
Balsam fir (Abies balsamea) generally shows very little compensatory growth following browsing, and browsed stems eventually become progressively weaker and then die (Brandner et al.
Birches whose shoots were previously browsed by moose have a higher probability of being browsed again than unbrowsed or slightly browsed birches because of the higher leaf and stem chemical quality, large long shoots, and greater proportion of shoots within reach of moose (Bergstrom 1984, Danell and Huss-Danell 1985, Danell et al.
Mean numbers of browsed twigs / ha did not significantly differ among ecoregions in 1977 (P = 0.
In 1977, the most commonly browsed species were Canada yew, mountain maple, balsam fir, and white birch which made up 31, 16, 13, and 12% of the browsed twigs, respectively.
Species browsed by moose in greater proportions relative to their availability in 1977 decreased in availability by 1996 (Table 3).
Use of balsam fir ranged from 16 to 34% of the total browsed twigs in 1977 and ranged from 73.