Temporal changes in basal cover of (a) black grama, (b) bush muhly, (c) spike dropseed, (d) total grasses, and (e) total grasses minus bush muhly on shrub cleared (b) and uncleared (Z) treatments in 1938, 1947, 1956, 1960, 1967, 1989, and 1995. Treatment means within years with different letters differ (p ≤ 0.05).
Havstad et al. 1999. Long-term influences of shrub removal and lagomorph exclusion on Chihuahuan Desert vegetation dynamics. Journal of Arid Environments 42:155-166.