“…Previous studies have found that microhabitats, topography, elevations, soil surface status, site conditions with grazing, vegetation (e.g. shrubs) and spring rainfall have important roles in the spatialetemporal patterns of SSB at small-scales (Coulson et al, 2001;Li, 2008;Ma et al, 2006;Osem et al, 2006;Pugnaire and Lazaro, 2000;Schmidt et al, 2009;Wang et al, 2005). Whether a spatial pattern exists in an arid region and whether aridity has a key role in spatial patterns of SSB at a larger scale require investigation.…”