What All Those Dead Trees Mean For The Sierra Nevada

The ponderosa pine had taken root decades before the Revolutionary War, making a stately stand on this western Sierra Nevada slope for some 300 years, Nate Stephenson figures. Then came the beetle blitzkrieg. Now the tree is a dab in the gray and rusty death stain smeared across the mountain range. At the base of its massive trunk, a piece of bark has been cut off, revealing an etched swirl of insect trails. Higher up, naked branches reach out, as if from a many-armed scarecrow. “This was alive until the drought killed it,” Stephenson says mournfully.