Photo: Will Grasslands Overtake U.S. Forests Due to Warming?

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Oak trees dot the prairie in Flint Hills, Kansas, where invasive great brome grass grows tall.

Climate Change could push grasslands to parts of the United States currently covered in forest, according to a study that says more extreme weather would shift the boundaries between different types of ecosystems.

The findings were presented on August 5, 2008, at a meeting of the Ecological Society of America.

Photo by Tim Fitzharris/Minden Pictures/NGS

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