A total of 17 species are now present in the foreground. No Yuccas or other plants have persisted over the 66 years between the dates of the photographs. In most of the repeat photography, few Yuccas appear to live longer than about 40 years. Many more plants appear in the 1999 view, partially in response to decreased disturbance as well as increased precipitation in the latter part of the 20^th century. For example, the road that previously crossed the foreground is difficult to detect. The foreground of this view is geomorphically active, and small rills and gullys cross parts of the foreground. Young geomorphic surfaces, such as that portrayed in this view, support young plant assemblages that recover relatively quickly following cessation of disturbance. (Dominic Oldershaw)