Buffelgrass Invasion of Native Arizona Vegetation
Figure 10. Correlation coefficients for various amounts of buffelgrass in the five dominant vegetation types at SNP that have buffelgrass invasion. In these graphs, the horizontal axis values represent the number of prior time periods over which precipitation is summed, with 0 = current precipitation, 1= precipitation from the previous time period, 2 = cumulative precipitation from the previous two time periods, and so on. The table in lower right corner of each panel shows the number of pixels within each density class for the vegetation types.