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Hand-written notes from old forest surveys have helped scientists track long-term changes in California forests, including a decline of large trees of up to 50 percent in the Sierra Nevada highlands, the south and central coast ranges and Northern California. The research team from the University of California, Berkeley, UC Davis and the U.S. Geological Survey compared unique forest surveys collected by UC Berkeley alumnus Albert Wieslander in the 1920s and '30s with recent U.S. Forest Service data to show that the decline of large trees and increase in the density of smaller trees is not unique to the state's mountains. Comment?
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