Thornapple Lake Nature Sanctuary is one of MNA’s many inland-lake sanctuaries, protecting roughly 60 acres of lakeshore where the Thornapple River enters the Thornapple Lake in Barry County. The densely forested sanctuary would be a tempting destination for hiking and exploration if not for the wet terrain making trails impractical. This type of habitat, which floods every spring, is known as a floodplain forest.
The Thornapple River, a major tributary of the Grand River which drains into Lake Michigan, travels nearly 90 miles through primarily agricultural land, and is disrupted at several points by man-made dams built to control its frequent flooding. From the tributary east of Charlotte until it joins Thornapple Lake the river flows freely, though with the appearance of a creek.
This floodplain forest area is therefore an important part of the landscape. Floodplain forests serve an important role in increasing natural water quality as pollutants get filtered out of the floodwaters through the soil. They also provide critical habitat for several rare birds, such as Baltimore Oriole, Cerulean Warbler and American Woodcock. The saturated soils of floodplain forests thaw earlier in the spring than surrounding soils, creating critical opportunities for early migratory birds to find food on their way to summer breeding grounds.
The area around Thornapple Lake, however, has become heavily developed over the years with waterfront homes and neighborhoods which intersect the shoreline. The development impacts the ability of waterfowl and other species to use the lake for feeding and breeding. Concerned with the overdevelopment of the lakeshore, Richard and Rosemary Shuster donated the land that has become Thornapple Lake Nature Sanctuary in 2009.
Many of MNA’s Nature Sanctuaries are known for being incredible destinations for hiking with spectacular overlooks, abundant spring wildflowers, and more. But sanctuaries like Thornapple Lake are a reminder that prioritizing the protection of Michigan’s rich natural heritage for wildlife and not just human enjoyment, is just as worthwhile.