How did the Bering Strait connections affect mammals in North America and Eurasia?

The Bering Land Bridge, or Beringia, served as a critical intercontinental connection between northeastern Asia and northwestern North America during periods of lowered sea levels, particularly throughout the Pleistocene Epoch.31

This land connection profoundly affected mammals by providing a migration route that allowed various species to extend their ranges between the Old and New Worlds. The dry, unglaciated climate of Beringia supported cold-hardy tundra vegetation, which facilitated the movement of terrestrial animals eastward into North America.234

The emergence of these intercontinental connections was one of the primary factors influencing mammalian evolution and distribution during the Pleistocene. As a result of these migrations, many species were able to colonize new territories, leading to a mixing of faunal characteristics across the region. Today, this historical connectivity is reflected in the biological gradients observed in areas like Alaska, where plant and animal forms exhibit both North American and Eurasian characteristics.54