This Aug. 1, 2011 file photo, shows whitebark pine that have succumbed to mountain pine beetles through the Gros Ventre area east of Jackson Hole, Wyo. U.S. officials say climate change, beetles ...

Genetic-Based Selection of Trees by Mountain Pine Beetle During a Climate Change-Driven Outbreak in a High-Elevation Pine Forest. Frontiers in Plant Science, 2018; 9 DOI: 10.3389/fpls.2018.00993 ...

BILLINGS, Mont. — Climate change, voracious beetles and disease are imperiling the long-term survival of a high-elevation pine tree that’s a key source of food for some grizzly bears and found ...

BILLINGS, Mont. (AP) — Climate change, voracious beetles and disease are imperiling the long-term survival of a high-elevation pine tree that’s a key source of food for some grizzly bears and ...

Environmentalist David Gonzales, of Jackson, Wyo., looks up at a dead whitebark pine tree in the mountains east of Jackson Hole, Wyo., in June 2010.