Factors and processes shaping the population structure and distribution of genetic variation across the species range of the freshwater snail radix balthica(Pulmonata, Basommatophora)

Table 2 Predictor combinations in statistical modelling with more than 5% support in Akaike weights

Measure of diversity/Factor combinations		d.f.	SS_res.	% explained variance	AIC	Akaike weight
H _E	N = 80
bar+exp		2	1.676	92.5	-76.22	0.56
bio+exp		2	1.685	92.4	-75.79	0.24
bio+exp+marg		3	1.654	92.6	-75.28	0.09
bar+exp+lim		3	1.660	92.6	-74.99	0.05
A	N = 80
bio+exp		2	115.06	90.1	262.10	0.88
bio+exp+marg		3	113.87	90.2	340.09	0.09
H _mt	N = 66
bar+exp+lim		3	273.23	79.9	289.06	0.95
s	N = 80
marg+exp+lim+size		5	4.06	49.0	122.1	0.97

All possible predictor combinations were tested with Generalised Linear Modelling and the support of all models by the data inferred by the Akaike Information Criterion (AIC). Akaike weights were calculated on the basis of all models tested. H_E = expected heterozygosity, A average number of rarefied alleles per locus, H_mt number of rarefied mitochondrial haplotypes, s estimate of population selfing rate.

ISSN: 2730-7182