This 2013 picture shows a patch of oak shrub surrounded by forest in New Mexico's Santa Fe National Forest. The patch, the result of an 1899 forest fire, is more than 100 years old. Researchers suggest that such changes from forest to shrubby, dense hard-to-walk-through vegetation will become more common as global warming continues.
This photo, 'After the forest fire -- oak shrub,' may only be used to illustrate a story about the research described in the news release, 'Prehistoric Changes in Vegetation Help Predict Future of Earth's Ecosystems.' Please make sure to credit the photo as requested. Do not post this photo independent of the story.