counts at a total of 12 points twice a week, every other week, with the exception of 4 points in
the Lake Alice Conservation Area, which I only sampled once a week. During the spring (4/05-
5/05), I surveyed 32 points once a week. During the summer (5/05-8/05), I surveyed 20 points
once a week, every other week. In the fall (9/05-11/05), I again surveyed 32 points once a week.
Vegetation sampling
To determine whether structural differences occurred, I conducted vegetation sampling at
both edge and interior locations during both the growing (spring, summer, and fall) and dormant
seasons (winter). Because woody stem density, tree density, and standing snag measures were
considered perennial habitat features, these were only sampled during the dormant season. I
carried out vegetation sampling only at point count locations used during the winter season. I did
this because the winter had the least sampling intensity in terms of the number of point count
locations sampled, and therefore was the most logistically practical set of points to collect data
from. I sampled woody shrub stem density (> 1 m in height, < 8 cm dbh) on two, perpendicular,
randomly assigned, 20 m transects running from the center of the point count sampling radii to
the margin (James and Shugart 1970). Following modified procedures from Tilghman (1987a)
and James and Shugart (1970), I randomly established four, 1 m2 subplots within each point
count sampling radii, and estimated several measures at each subplot. I counted woody shrub
stems (< 8 cm dbh) to document shrubs less than Im in height. I visually estimated ground cover
for cover classes representing percentages of cover (including, 0%, >0-10%, 10-25%, 26-50%,
51-75%, > 75%) of bare ground, grass, dead debris, forbs, shrubs (woody or herbaceous), trees
(woody stems >8 cm dbh), and vines. The proportion of occurrence (i.e., how many 1 m2
subplots a cover class occurred in) of each cover class per cover variable was averaged over the
four 1 m2 subplots per 20 m point count sampling radii. I visually noted vertical vegetative
structure for each type of vegetation that was at < 1 m in height, > 1 m and < 5 m in height, and >