Bummer: Carbon dioxide has killed so many bears in Yellowstone since 1975 that the grizzly population has only increased by a factor of more than three

Yellowstone National Park is being hit hard by climate change | MNN - Mother Nature Network

I'll be honest, it's a grim read. The quick of it is that global warming is killing off, either directly or indirectly, vast swaths of trees, streams full of fish, and a sloth of bears. Global warming bakes some species, like fish, which can't survive living in water that can be 20 degrees warmer than normal, while it helps facilitate the demise of others like lodgepole pine, which are killed by bark boring beetles that used to killed by winter cold snaps that don't come anymore. Bears are starving to death or attacking campers because their food sources are disappearing.

Jonathan Overpeck, co-director of the Institute of the Environment at the University of Arizona, worries that the western U.S. could turn into a "second Outback," largely stripped of plants, animals and people.

[Oct 2010]: Yellowstone grizzly population is at its highest in decades - latimes.com

BOZEMAN, Mont. — Grizzly bear numbers in and around Yellowstone National Park have hit their highest level in decades, driving increased conflicts with humans as some bears push out of deep wilderness and into populated areas.

Scientists from a multi-agency research team announced Wednesday that at least 603 grizzlies now roam the Yellowstone area of Wyoming, Montana and Idaho. That's more than three times the number in 1975, when hunting was outlawed and the species placed on the endangered list.