Figure 1From: Long-term changes in biological soil crust cover and compositionChanges in (A) total crust cover and (B) bryophyte cover between 1999 and 2010 differed significantly between exclosure treatments ( t = −3.0, p = 0.006; t = − 2.8, p = 0.007) whereas (C) lichen cover did not. Each box denotes the first and third quartiles of the data with the median as a thick line near the center and whiskers extending to 1.5 interquartile distances. Observations beyond 1.5 interquartile distances from the median are shown as individual points. The gray horizontal line indicates zero change.Back to article page