Table 2.

Mixed-effects model of the impacts of climate manipulation treatments and time since the start of the experiment on the proportional cover of cyanobacteria, moss, and lichen in biocrusts

Group	Source*	df	F	P
Cyanobacteria	Treatment	3	0.33	0.8026
	Time	18	4.34	<0.0001
	Treatment × time	54	2.32	<0.0001
Moss	Treatment	3	0.58	0.6301
	Time	18	2.12	0.0055
	Treatment × time	54	1.52	0.0161
Lichen	Treatment	3	0.55	0.6487
	Time	18	4.83	<0.0001
	Treatment × time	54	1.52	0.0166

^*Treatment blocks were considered random effects and contributed 15.3%, 13.5%, and 1.4% of the variation in cyanobacterial, moss, and lichen cover, respectively. Treatments included controls (no climate manipulations), warming, watering (frequent, small-volume water addition), and warming + watering.