Photos of this habitat 1 2
Oak Savanna/Aspen Parkland

In the north, the grassland prairie is interspersed with trembling aspen (Populus tremuloides), creating a habitat known as aspen parkland. Aspen bark is not resistant to fire, but the species reproduces so rapidly and densely that the interior of the groves does not allow enough grass to grow to support fire except in extreme drought years.

The grassland-forest was a dynamic boundary, with the grassland expanding in dry years and the forest expanding in wet years.