Table 3. Insect-plant diversity relationship at various spatial sampling scales.

While the relationship between insect and plant diversity components was always positive, it was only significant at the smaller sampling scales with the most statistical power, and plant diversity components explained a maximum of 11% of variance in insect diversity.

Scale	Insect species richness ~ Plant species richness		Insect species richness ~ Plant species PD		Insect species α diversity ~ Plant richness		Insect species α diversity ~ Plant species α diversity
	R2	p	R2	p	R2	p	R2	p
Plot (n = 300)	0.076	<0.001	0.040	<0.001	0.052	<0.001	0.031	0.001
Square (n = 60)	0.107	<0.001	0.052	0.043	0.046	0.055	0.049	<0.001
Site (n = 30)	0.006	0.288	-0.020	0.522	0.084	0.065	0.066	0.092
Cluster (n = 6)	0.035	0.338	0.103	0.278	0.047	0.429	0.085	0.292