Identified in both the terrestrial and aquatic Great Lakes Conservation Blueprints, this area is a prime example of globally-threatened alvar habitat, characterized by thin soils over limestone bedrock. The 12,000 hectare (30,000 ac.) natural area is made up of various native grasslands, forests and wetlands, supporting species such as the eastern loggerhead shrike, bobolink and Olympia marble butterfly. Vulnerable to invasive species like dog strangling vine and buckthorn, the Carden Alvar is a key target for biodiversity within the Great Lakes.
Decodon, pontederia and buttonbush (Photo by Caroline Tanguay/NCC)