Fig 5. The five dominant forest types in the Upper Midwest as defined by k-medoid clustering.

Forest types (from largest to smallest) include Hemlock-Cedar-Birch-Maple (yellow), Oak-Poplar-Basswood-Maple (light purple), Tamarack-Pine-Spruce-Poplar (light green), Oak Savanna (dark purple) and Pine (orange). These forest types represent meso-scale (64km²) forest associations, rather than local-scale associations.