One would think the Bison is extinct, and somehow, it was the fault of the Ice Age..
Quite to the contrary, the Bison was doing quite well when european colonists reached american shores..
In fact, early americans documented complaints of bison as far east as New York, and having their buildings knocked down by bison that were attempting to "get rid of an itch"..
The bison is (was) not just a plains critter..
They also populated forested areas, and were wide-spread across the continent.. ( although they probably didn't do too well in desert areas of the southwest, they were also there, in smaller numbers.. )
The position that the Ice Age created a "decline" in the population is basically true, but hardly monumental news..
A great deal of the animal's grazing range was covered in ice.. the resultant reduction in grazing further resulted in a reduction in population..
The article is interesting in that it uses DNA testing to document "which" bison strains survived to the present, but actually, IMHO, really doesn't advance science by reaching conclusions as stated in the title..