North American bison fell from millions to hundreds, but ancient DNA shows they kept much of their genetic diversity as isolated herds became different

Recent genetic studies unveil that bison diversity has remained stable even after significant population decreases, emphasizing that fragmentation and isolation are now prominent legacies following near extinction events. The modern wood bison displays ancestry from plains bison due to translocations in the 1920s, while the presence of cattle ancestry within bison is surprisingly less common than previously thought.
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