What habitat niche historically defined the range of the Plains Bison relative to the Wood Bison?

Answer

Plains Bison dominated the open prairies further south.

A crucial element in understanding the subspecies difference is their specialization in habitat. Historically, the Wood Bison evolved to thrive within the confines of the dense boreal forests and associated parkland environments located in the northern reaches of their range. In contrast, the Plains Bison adapted to and dominated the more open ecological setting characterized by prairies located further to the south, illustrating a clear geographic and environmental separation between the two groups.

What habitat niche historically defined the range of the Plains Bison relative to the Wood Bison?
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