Review and download Chapter 3 - Golden-winged Warbler Working ...
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Lower Michigan Subregion (Focal Areas GL7–GL8; Figures 3–46 <strong>and</strong> 3–47; Table 3–13)<br />
General Description<br />
This subregion supports approximately 3% of the<br />
region’s (<strong>and</strong> 2% of the world’s) <strong>Golden</strong>-<strong>winged</strong><br />
<strong>Warbler</strong>s. The primary habitats for <strong>Golden</strong><strong>winged</strong><br />
<strong>Warbler</strong> in these focal areas are young<br />
aspen forest <strong>and</strong> shrub wetl<strong>and</strong>s. Major threats<br />
Macro L<strong>and</strong>scape Context (within 1.5 mi (2.5 km) of management site)<br />
<strong>Golden</strong>-<strong>winged</strong> <strong>Warbler</strong>s are generally associated with l<strong>and</strong>scapes containing:<br />
3–73<br />
in these areas are the lack of even-aged forest<br />
management <strong>and</strong> Blue-<strong>winged</strong> <strong>Warbler</strong><br />
encroachment (especially in the south). There is a<br />
high potential for creating young forest here, but<br />
private l<strong>and</strong>s are crucial.<br />
• The following l<strong>and</strong> cover types: 22% herbaceous <strong>and</strong> 70% forest that is predominantly 33–82 ft<br />
(10–25 m) in height (large sapling to small sawtimber sized trees).<br />
• A ratio of 70:30; deciduous:coniferous trees with low or no <strong>Golden</strong>-<strong>winged</strong> <strong>Warbler</strong> occurrence<br />
in forested l<strong>and</strong>scapes containing greater than 35% coniferous forest.<br />
• Tree communities dominated by balsam poplar, aspen, or paper birch with trees that are 16–33<br />
ft (5–10 m) tall (sapling-sized trees).<br />
Micro L<strong>and</strong>scape Context (within 0.15 mi (0.25 km) of management site)<br />
Sites where <strong>Golden</strong>-<strong>winged</strong> <strong>Warbler</strong>s are found generally contain:<br />
• The following l<strong>and</strong> cover types: deciduous forest (44%); woody wetl<strong>and</strong>s (20%); emergent<br />
herbaceous wetl<strong>and</strong>s (6%), shrub-scrub (6%). Blue-<strong>winged</strong> <strong>Warbler</strong>s used very similar habitats<br />
(only ±2–3% different in each category).<br />
Table 3–13. Population <strong>and</strong> habitat goals for focal areas in the Lower Michigan subregion.*<br />
Focal<br />
Area<br />
Map ID Focal Area Name<br />
Michigan Northwestern<br />
GL7<br />
Lower Peninsula<br />
Estimated<br />
Population<br />
for 2010<br />
(individuals)<br />
Population<br />
Goal for<br />
2050<br />
(individuals)<br />
Estimated<br />
Breeding<br />
Habitat for 2010<br />
in acres (ha)<br />
Breeding<br />
Habitat Goal<br />
for 2050 in<br />
acres (ha)<br />
5000 7500 25,000 (10,000) 37,500 (15,200)<br />
GL8<br />
Michigan Gladwin Lake<br />
Plain (IBA) with northern<br />
extension<br />
5000 7500 25,000 (10,000) 37,500 (15,200)<br />
*Population estimates are based on expert knowledge <strong>and</strong> <strong>Golden</strong>-<strong>winged</strong> <strong>Warbler</strong> Atlas Project data.
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