Extinction of the giants

[brobear]

Arctodus simus - from page #2 reply #21.

Interspecies Interaction
Studies of Pleistocene Arctodus fossils from Beringia (Siberia, Alaska and the Bering Straight) indicate that competition with brown bears may have been a factor in the extinction of Arctodus. (Barnes et al 2002)
The two species coexisted for 10,000 years between 45 to 35,000 years ago.
Arctodus fossils are mostly found later when brown bears were absent.
The last Arctodus fossils date to the same time when brown bears are again present.
Arctodus may have competed for carcasses of hoofed animals killed by saber-toothed cats, American lions, dire wolves (Figueirido et al 2009) and possibly humans.

[brobear]

Arctodus simus - page #1 first post.

Extinction:
The giant short-faced bear became extinct about 12,000 years ago, perhaps partly because some of its large prey died out earlier, and partly also because of competition with the smaller, more omnivorous brown bears that entered North America from Eurasia. Since its demise coincides with the development of the Clovis technology and improved hunting techniques by humans in North America, hunting pressure may also have contributed to its extinction, both directly (human hunting) or indirectly (due to the depletion of other large mammals which it may have followed to scavenge kills or depended upon as prey).

[BruteStrength]

Nov 16, 2019 16:57:45 GMT -5 brobear said:

Arctodus simus - page #1 first post.

Extinction:
The giant short-faced bear became extinct about 12,000 years ago, perhaps partly because some of its large prey died out earlier, and partly also because of competition with the smaller, more omnivorous brown bears that entered North America from Eurasia. Since its demise coincides with the development of the Clovis technology and improved hunting techniques by humans in North America, hunting pressure may also have contributed to its extinction, both directly (human hunting) or indirectly (due to the depletion of other large mammals which it may have followed to scavenge kills or depended upon as prey).

This is why brown bear are better at surviving because brown bears can eat other things besides meat.