A graph showing the relative abundance of three native plant species along the Colorado River corridor per river mile

Distribution of three native plant species, Baccharis emoryi, Baccharis salicifolia, and Baccharis sarothroides, along the Colorado River corridor per river mile, downstream of Glen Canyon Dam. Note the species shift from river miles 0 to 245. Vertical dotted lines on each graph delineate Marble Canyon, Eastern Grand Canyon, and Western Grand Canyon. Photos of each species are shown to the right of their distribution along the river. Graph modified from Palmquist et al. (2018). Photographers: Emily Palmquist and Sarah Sterner (USGS).