Table 1.

Global linear‐mixed models to test for effects of Ephedra californica shrubs on the relative abundance of species richness of annual plants within this system

Measure	Effect	Estimate	df	p‐value
Rii (abundance)	Intercept	0.2	4	.006
	Volume	0.29	220	.05
	Year	3.58	1	.06
Rii (richness)	Intercept	−0.1	3	.26
	Volume	0.0008	0.002	.09
	Year	54.5	1	.0001

Linear‐mixed models with a Satterthwaite approximation for degrees of freedom were used with year as nested, random effect and volume as a covariate. The global models were used to identify large net differences in the Rii effect size measure (see text for description). Bold values highlight alpha at p < 0.05.