Table 2. The ten models with the highest R² and lowest AIC_c arranged by AIC weights (AIC_w).

UNADJUSTED MODEL: Variables in the ten best models
# Variables	4	4	4	4	3	4	4	4	4	5
R2	0.96	0.96	0.96	0.96	0.94	0.95	0.95	0.95	0.95	0.96
AICc	260.6	260.6	260.6	261.2	262.2	263.0	263.7	263.8	263.9	263.9
AICw	0.192	0.189	0.187	0.140	0.084	0.057	0.040	0.038	0.037	0.037	T
# Geo class	x	x	x	x	x	X	x	x	x	x	10
Calcareous	x	x	x	x	x	X		x	x	x	9
Latitude	x		x		x		x				4
Max Elev.		x	x			X				x	4
Elev. Range	x			x				x			3
Mean Temp		x		x						x	3
Ave of Coldest						X		x	x		3
Acid shale							x			x	2
Min of coldest									x		1
Granite							x				1

The unadjusted model included area as a possible variable. In the residual model, species diversity explained by area was first factored out of the model.