Does Proximity to Wetland Shrubland Increase the Habitat Value for Shrubland Birds of Small Patches of Upland Shrubland in the Northeastern United States?
Table 2
Attributes of 22 sites studied in 2011.
Attributes
Mean
Standard deviation
Species richness
All birds
10.27
2.35
Shrubland birds
Shrubland specialists
5.95
1.21
Wetland/upland shrubland birds
4.59
1.37
Upland shrubland birds
1.36
0.95
Nonshrubland birds
4.32
1.84
Patch size
Upland shrub (ha)
2.58
4.51
Wetland shrub (ha)
0.84
2.47
All shrub (ha)
3.42
4.75
Percent of land use within 100 m
Upland shrub (%)
0.25
0.20
Wetland shrub (%)
0.08
0.16
All shrubs (%)
0.33
0.21
Forest (%)
0.39
0.27
Grassland (%)
0.07
0.10
Impervious surface (%)
0.10
0.09
Mowed lawn (%)
0.11
0.15
All wetland types (%)*
0.15
0.22
Percent land use within 50 m
Upland shrub (%)
0.45
0.26
Wetland shrub (%)
0.12
0.22
All shrubs (%)
0.58
0.23
Forest (%)
0.34
0.24
Grassland (%)
0.02
0.04
Impervious surface (%)
0.03
0.05
Mowed lawn (%)
0.04
0.06
All wetland types (%)*
0.17
0.27
Shrub height (m)
3.14
1.32
Tree canopy cover (%)
0.13
0.14
Shrub canopy cover (%)
0.40
0.28
Urban areas within 1 km (%)
0.28
0.20
Human dominated areas within 1 km (%)
0.42
0.27
Wetlands within 1 km (%)
0.01
0.03
Note: *includes all wetland types listed in the National Wetland Inventory (wetland shrub, wetland forest, open water, etc.).
