Avian Use of Purple Loosestrife Dominated Habitat Relative to Other Vegetation Types in a Lake Huron Wetland Complex
Table 5
| TABLE 5. Mean density (no./ha) ± SE of the six most commonly observed bird species by vegetation type in Saginaw Bay wetlands, 1994-1995. | ||||||||||||
| Sedge Wren | ||||||||||||
| 1994 | 1995 | Marsh Wrenb |
Yellow Warbler | Common Yellowthroatb |
Swamp Sparrowb |
Red-winged Blackbird | ||||||
| Vegetation typea | Period 2b | Period 3b | Period 2b | Period 3b | Period 2b | Period 3b | Period 2b | Period 3b | ||||
| SS | 0 C | 0 C | 0 B |
0 B |
0 C |
9.3 ± 1.0 A |
14.7 ± 1.0 A |
2.7 ± 0.6 Be |
11.3 ± 1.8 C |
17.3 ± 1.8 A |
6.0 ± 1.8 Ag |
|
| WM/SS | 6.7 ± 1.6 B | 3.0 ± 1.6 BC | 0 B |
10.0 ± 1.9 A |
0 C |
3.3 ± 1.3 B |
2.0 ± 1.2 B |
5.3 ± 0.8 A |
21.5 ± 2.3 B |
0 C |
0 B |
|
| WM/SS/LS | 10.0 ± 1.9 AB | 0 C | 6.7 ± 2.2 Ad |
3.3 ± 2.2 B |
0 C |
2.8 ± 1.4 B |
1.7 ± 1.6 B |
1.5 ± 1.0 BC |
27.8 ± 2.8 B |
7.1 ± 2.7 Bf |
1.7 ± 2.9 AB |
|
| WM/LS | 0 C | 6.7 ± 2.2 Bc | 0 B |
0 B |
0 C |
0 B |
0 B |
0 C |
44.2 ± 2.9 A |
0 C |
0 B |
|
| WM | 13.3 ± 2.2 A | 13.3 ± 1.6 A | 3.3 ± 1.6 AB |
3.3 ± 1.6 B |
0.5 ± 1.9 C |
0 B |
0 B |
1.4 ± 0.8 BC |
21.2 ± 2.2 B |
6.7 ± 2.4 Bf |
4.2 ± 2.0 AB |
|
| IC | 0 C | 0 C | 0 B |
0 B |
15.6 ± 1.8 B |
0.7 ± 1.0 B |
0 B |
0 C |
9.6 ± 2.1 C |
5.7 ± 1.9 BC |
4.4 ± 2.4 AB |
|
| CC | 0 C | 0 C | 0 B |
0 B |
20.6 ± 1.2 A |
0 B |
0 B |
0.2 ± 0.5 C |
1.5 ± 1.4 D |
1.8 ± 1.4 BC |
1.2 ± 1.4 B |
|
| CB | 0 C | 0 C | 0 B | 0 B | 0.5 ± 2.0 C | 0 B | 0 B | 0 C | 0 D | 0 C | 0 B | |
| a Vegetation
types: SS = scrub-shrub, WM/SS = wet meadow/scrub-shrub, WM/SS/LS = wet
meadow/scrub-shrub/loosestrife, WM/LS = wet meadow/loosestrife, WM = wet
meadow, IC = inland cattail, CC = coastal cattail, CB = coastal bulrush. b Means within columns followed by the same letter do not differ (P > 0.05) as determined by ANOVA and Fisher's least significant difference. c Fisher's least significant difference multiple comparisons were not corroborated by 90% confidence interval comparisons with WM/SS/LS and IC (see METHODS). d Fisher's least significant difference multiple comparisons were not corroborated by 90% confidence interval comparisons with WM/SS and WM/LS (see METHODS). e Fisher's least significant difference multiple comparisons were not corroborated by 90% confidence interval comparisons with WM/LS (see METHODS). f Fisher's least significant difference multiple comparisons were not corroborated by 90% confidence interval comparisons with WM/SS, WM/LS, and CB (see METHODS). g Fisher's least significant difference multiple comparisons were not corroborated by 90% confidence interval comparisons with WM/SS, WM/LS, and CB (see METHODS). |
||||||||||||
Previous Section -- Table 4 -- Mean avian density, avian diversity, and number of plots by vegetation in Saginaw Bay wetlands.
Return to Contents
