Changes in vegetation cover between 1954 and 1963 on Frijolito Mesa in Bandelier National Monument. The figure illustrates persistent ponderosa pine forest, persistent piñon-juniper woodland, and the ecotone shift zone where forest changed to woodland between 1954 and 1958 due to the death of the overstory ponderosa pine trees.
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U.S. Department of the Interior | U.S. Geological Survey
URL: http://www.fort.usgs.gov/resources/spotlight/place/place_ecotone.asp
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