Table 3.

The percentage of variation explained in genetic loci accounted for by non-geographically structured environmental variables [a], shared (geographically structured) environmental variables [b], pure geographic factors [c], and undetermined component [d] analyzed based on the eight retained environmental variables.

	Variation (adjusted R2)	F	P
Environment [a]	0.05183	1.7834	0.001
Environment + Geography [b]	0.00356	–	–
Geography [c]	0.01840	2.0527	0.001
[a + b + c]	0.07379	1.9082	0.001
Residuals [d]	0.92621	–	–

Proportions of explained variation were obtained from variation partitioning by redundant analysis. F and P values are specified for testable fractions. Fraction [b] is untestable because the adjusted R² value was obtained by subtraction ([a + b + c] − [a] − [c]) rather than by estimation.