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Roy V. Rea Kenneth N. Child David P. Spata Douglas MacDonald 《Environmental management》2010,46(1):101-109
Plants cut at different times produce resprouts that vary in their nutritional value relative to when they are cut. To determine
how vegetation management in transportation (road and rail) corridors at different times of the year could influence browse
quality in the years following cutting, and how this could potentially influence encounters between herbivores and vehicles,
we undertook a 3-year study. In 2001, at a wildlife viewing area near Prince George, British Columbia, Canada, we established
a control area and treatment areas where shrubs and trees that are used as food by moose (Alces alces) were cut at the beginning of June, July, August, September, and October. In the fall, moose were most often observed browsing
the resprouts of plants cut in August (years 1 and 2 post-treatment) and September (year 3). Cumulative winter track counts
were highest in the uncut control area in the years following cutting. Spring pellet counts revealed that most pellets were
deposited in the uncut (years 1 and 2) and August-cut (year 3) areas during winter. With the exception of the first year after
cutting, browse removal by moose was highest for plants cut later in the growing season. Overall, our findings suggest that
following cutting, plants cut later in the year are selected more often by moose relative to those cut earlier. To reduce
browse use of corridor vegetation in areas where concerns for moose-vehicle collisions exist, we recommend that vegetation
maintenance activities be conducted in the early summer months of June and July. 相似文献
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An experiment was conducted to determine the influence the time of brush-cutting can have on plant regrowth and attractiveness
to herbivores that browse in linear corridors. The influence of cutting time on leaf flush and senescence, shoot morphometry,
and biomass was measured for 3 consecutive years after initial brush-cutting. Results indicate that morphological and phenological
attributes of three woody deciduous plants were influenced by the timing of brush-cutting for up to 3 years after initial
cutting. Brush-cutting generally stimulated plants to produce larger than normal shoots and delay leaf senescence. The degree
to which plants were affected, however, varied with the timing of initial cutting and the species in question. Generally,
plants cut later in the year resprouted more vigorously and were taller in the third year after cutting but produced less
overall biomass than when cut earlier. In the years following brush-cutting, plants cut earlier flushed leaves earlier in
the spring but delayed leaf senescence in the fall when compared to uncut controls. Results of these trials suggest that brush-cutting
time influences plant response and several plant attributes known to influence plant attractiveness to moose and other herbivores.
We therefore recommend that roadside and railside vegetation management plans consider the influence of cutting time on plant
regrowth. Such considerations can ensure that brush is cut to reduce the attractiveness of plant regrowth in these linear
corridors, reduce the utilization of such brush by herbivores, and, as such, mitigate collision risk between motorists and
herbivores such as moose. 相似文献
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