Impacts of Climate Change and Land Use on the Southwestern United States
Land Use History of North America (LUHNA): Repeat Photography


Figure 10 & 11 - (Older image is on the left.) Fire suppression could explain the shifting of local ecotones, for example as shown in H. E. Gregory's 1920s and Ray Turner's 1988 photographs of Bear's Ears in southeastern Utah. Note the expansion of mixed conifer forest, including Douglas-fir (Pseudotsuga menziesii), white fir (Abies concolor), and (Pinus ponderosa) from Bear's Ears down to level terrain of Elk Ridge.

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