More than 25,000 square miles of the U.S. Great Basin, an area nearly twelve times the size of Yellowstone, has flipped from native sagebrush to invasive annual grassland over the past three decades, much of it without ever burning. The change is amplifying the Western fire season. Researchers using satellite data found that fire is no longer required to convert these landscapes; once the grasses arrive, the fire follows. Grasses occupy a unique…
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