Table 2.

Akaike Information Criterion (AIC) table testing the effects of vegetation cover and the climate and burned treatments on Bromus tectorum cover

Model	Tested factor	AIC	Δ AIC
•Full model	NA	338.12	0
•Full-forb cover	Forb cover	336.84	− 1.28
•Full-native grass cover	Native grass cover	377.29	39.17
*Climate + veg	Burn treatment	337.40	− 0.72
*Burn + veg	Climate treatment	341.23	3.11
*Climate + burn + veg	Climate × burn interaction	336.54	− 1.58

Delta (Δ) AIC indicates the relative importance of the tested explanatory variable (higher delta values indicate those factors that were most important)

•Full model = lmer (ln(B. tectorum cover) ~ (climate x burn status) + native grass + forb + (1 year)

*Veg = Native grass cover + forb cover