Introduced annual grass increases regional fire activity across the arid western USA (1980–2009)

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Bromus Response to Climate and Projected Changes with Climate Change (2016, background): “tectorum-invaded ecosystems were larger and more frequent, with fire return intervals averaging between 50 and 80 years regionally (Balch et al. 2013) and even more frequently in highly invaded landscapes (Whisenant 1990).”
Ecosystem Impacts of Exotic Annual Invaders in the Genus Bromus (2016, background): “Balch et al. ( 2013 ) also found that 65 % of fi res from 2000 to 2009 started on B. tectorum- dominated sites, and a substantial fraction of these spread onto sites that were not dominated by B. tectorum .”
The spatially varying influence of humans on fire probability in North America (2016, background): “For instance, the invasion of exotic cheatgrass species (Bromus spp.) have profoundly modified fire regimes in parts of the western US (Balch et al 2013, Parks et al 2015), but are not fully captured by our three indexes.”
Effect of fire on small mammals: a systematic review (2014, background): “In particular, invasive grasses present a risk to species by increasing fire intensity and its extent and frequency (Setterfield et al. 2010; Litt and Steidl 2011; Balch et al. 2013).”