Table 2.

Correlations of landscape variables with genetic diversity and genetic differentiation obtained from 21 three-spined stickleback populations. (A) Pearson correlations of geographical features with allelic richness (AR); (B) Mantel matrix correlations of pairwise geographical features with pairwise F_ST, and with the absolute values of residual pairwise F_ST.

	(A) AR	(B) †Pairwise FST
Geographical feature	R	R	Residual
River distance (km)	−0.62**	0.46**	0.13
Mills	−0.67***	0.53**	0.26*
Tunnels and sluices	−0.63**	0.35	−0.08
Weirs	−0.82***	0.68***	0.32*
All barriers	−0.86***	0.70***	0.17
Barrier height (m)	−0.78***	0.68***	0.24*
Log10(habitat width)	0.60**	−0.57***	−0.21*
Log10(watershed position)	0.75***	−0.37*	−0.16

Underlined correlations are plotted in Fig. 2.

^*P < 0.05;

^**P < 0.01;

^***P < 0.001.

^†P-values are given after 10 000 randomisations.