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CONCLUSIONS
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Our
objective was to determine if the abundance of selected avian
species indicates disturbance in mixed pine-hardwood stands that
differ in military and forestry practices. These stands, which
were burned in 2000 or 2002, have disturbance features such as
roads and clearcuts. The combination of burning and heavy land
use can alter habitats and may increase abundance of early successional
species and/or pine grassland species.
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Abundance for only two species, Northern Bobwhite and Indigo Bunting,
differed among the four land use treatments, and these differed
only between the treatment extremes: both species were more abundant
in recently burned, heavy use sites (2002H) than in light use
sites burned in 2000 (2000L). This suggests that these species
respond positively to the open conditions created by both burning
and heavy military use. However, differences in abundance were
not found for other early successional or open site species.
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Disturbance
likely influences occurrence of most of the selected avian species
across the Ft. Benning landscape. Abundance of the selected species,
however, may not be a suitable indicator of current land use because
these species may not discriminate finely over a landscape and region
that reflects a long history of natural disturbances and intensive
land use. An intensive study of avian abundance across Ft. Benning
may better define distribution and population patterns, and would
likely show that early successional species are positively affected
by management practices. |
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