Figure 1From: Twentieth century carbon stock changes related to Piñon-Juniper expansion into a black sagebrush communityHop Creek study area aerial photos from 1937 and 2006. The 1937 photo shows our study plots. The boxed areas in each photo show a 25 ha area where our study plots were located and was the area used for the image segmentation ortho-photo analysis.Back to article page