Table 2. Model-fit results for AIC analysis of the environmental correlates with variance in the population frequencies of Ac/ac, Li/li and AcLi.

Factors in model	d.f.	Ac/Ac		Li/li		AcLi
		AIC	Adj r2	AIC	Adj r2	AIC	Adj r2
MWT	2	−485.4	0.23	−517.1	0.42	−554.6	0.41
AP	2	−442.3	0.00	−428.9	0.01	−469.4	0.01
Apet	2	−463.0	0.12	−444.4	0.09	−499.6	0.18
MWT+AP	3	−484.3	0.23	−516.6	0.42	−553.2	0.41
MWT+ Apet	3	−489.2	0.25	−515.8	0.42	−561.0	0.44
AP+Apet	3	−461.8	0.12	−444.3	0.10	−500.5	0.19
MWT * AP	4	−492.5	0.27	−555.4	0.54	−598.4	0.55
MWT * Apet	4	−493.2	0.27	−549.9	0.53	−595.3	0.54
AP *Apet	4	−493.6	0.28	−498.3	0.35	−559.4	0.43
MWT+AP+Apet	4	−487.6	0.25	−515.1	0.42	−559.3	0.43
MWT * AP+Apet	5	−491.5	0.27	−559.9	0.56	−596.4	0.55
MWT * Apet+AP	5	−492.4	0.27	−553.2	0.54	−595.9	0.55
AP *Apet+MWT	5	−504.7	0.33	−544.6	0.52	−594.3	0.54
MWT+AP+Apet+MWT AP+MWT:Apet	6	−490.8	0.27	−561.1	0.56	−599.5	0.56
MWT+AP+Apet+MWT AP+AP:Apet	6	−503.0	0.32	−561.1	0.56	−602.6	0.57
MWT+AP+Apet+AP Apet+MWT:Apet	6	−503.7	0.33	−553.4	0.54	−599.2	0.56
MWT+AP+Apet+AP:Apet	7	−501.7	0.32	−501.7	0.56	−560.1	0.57
MWT * AP * Apet	8	−500.7	0.32	−558.4	0.56	−600.1	0.57

Abbreviations: adj, adjusted; Apet, annual evapotranspiration; AP, annual precipitation; MWT, minimum winter temperature. Bold text indicates the best fitting models.