changes in the Tuolumne area by using photo's all the way back to 1900. Make
sure you check out the map too.
Over 80 photographs from circa-1900 and circa-1985 were compared to those taken in
2008 to add an additional quarter century to previous change detection studies
completed in the region. Photograph triplets showed evidence of1) increased density
of Krummholz stands, 2) increased density of sub-alpine forest stands at the tree
line, 3) invasion of individual trees into meadows, 4) reduced instances of forest
clearings and increased forest density, and 5) growth of trees on domes and rocky
slopes. Evidence of upslope movement of the tree line was visible, confirming current
knowledge of tree line systems in the American West, but contrary to previous studies
conducted in this specific area.