Upland alvars

Upland alvars are rare, unique ecosystems found on limestone or dolomite bedrock, mainly in the Great Lakes region of North America. They are characterized by thin soil layers and a specialized mix of plants, including grasses, wildflowers, and rare species adapted to nutrient-poor conditions. These landscapes often feature open, rocky ground with patches of vegetation, supporting biodiversity and ecological importance. Upland alvars are sensitive to disturbances like development and invasive species, making their conservation vital for maintaining regional natural heritage and rare plant and animal communities.