AN EXCERPT: The vast wildfires of this summer and last represent a new normal for the western United States. They may signal a radical landscape transformation, one that will make the 21st century West an ecological frontier.
Unlike fires that have occurred regularly for thousands of years, these fires are so big and so intense as to create discontinuities in natural cycles. In the aftermath, existing forests may not return. New ecosystems will take their place.
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http://www.wired.com/wiredscience/2012/07/western-fire-transformation/#more-119368
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