Table 4. GLMM results indicating a significant effect of roof area and maintenance regime on species richness and abundance.

	Estimate	Std. Error	t-value	P-value
Species Richness
Height	0.0639	0.083	0.771	0.449
Age	-0.016	0.011	-1.407	0.174
Area	7.6e-6	3.6e-6	-2.112	0.047*
Plant Diversity	-0.145	0.201	-0.722	0.478
Maintenance	0.762	0.184	4.132	0.0005*
Abundance
Height	0.075	0.149	0.506	0.618
Age	-0.032	0.021	-1.515	0.145
Area	2.01e-5	9.5e-6	-2.123	0.046*
Plant Diversity	-0.588	0.531	-1.109	0.280
Maintenance	1.086	-.463	2.346	0.029*

*significant p-value