Contrasting evolutionary histories of the legless lizards slow worms (Anguis) shaped by the topography of the Balkan Peninsula

Table 2 Results of the multiple linear regressions between nucleotide diversity (π), topographic heterogeneity [estimated as the third quartile (Q3) of the terrain ruggedness index (TRI), and median and modus calculated for data above Q3], and the area size of the topographic units inhabited by particular slow-worm lineages/haplogroups

	Apuseni Mts. within the Carpathians		Apuseni Mts. as a separate unit
	R² /beta	P	R² /beta	P
TRI (Q3)/area size	0.814	0.035	0.830	0.012
TRI (Q3)	0.987	0.015	0.935	0.004
area size	0.274	0.316	0.228	0.281
TRI (median above Q3)/area size	0.897	0.011	0.869	0.006
TRI (median above Q3)	1.110	0.004	0.973	0.002
area size	0.445	0.080	0.299	0.137
TRI (modus above Q3)/area size	0.843	0.025	0.847	0.009
TRI (modus above Q3)	0.966	0.010	0.922	0.003
area size	0.184	0.433	0.079	0.670

In the first set of analyses the Apuseni Mts. were considered to be a part of the Carpathians, in the second set of analyses they were treated as a separate geographical unit. Coefficients of determination (R²) were computed for the overall model of multiple regressions [TRI (Q3)/area, TRI (median above Q3)/area, TRI (modus above Q3)/area]. Standardized regression coefficients (beta) were calculated for the partial regressions between nucleotide diversity and TRI values, and nucleotide diversity and the area size, respectively
P - probability values. Values in bold are statistically significant

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