Table 2.

Multiple linear regression results showing standardized coefficients (β), p-values, and model explanatory power (R²) for the effects of European blueberries (Vaccinium myrtillus) age and elevation on element concentrations, for the entire dataset and separately for Transect 1 (higher transect) and Transect 2 (lower transect)

Element	Dataset	β (Age)	p (Age)	β (Elevation)	p (Elevation)	R2
S	All	0.18	0.053	0.27	0.003	0.04
	T1	−0.03	0.710	0.21	0.025	0.05
	T2	0.21	0.071	−0.04	0.712	0.05
Cl	All	−0.01	0.926	−0.06	0.516	0.003
	T1	0.07	0.460	0.11	0.244	0.01
	T2	−0.08	0.484	0.07	0.575	0.01
K	All	0.02	0.796	−0.47	0.000	0.23
	T1	0.08	0.396	0.05	0.590	0.01
	T2	−0.05	0.668	0.12	0.315	0.02
Ca	All	−0.04	0.636	−0.10	0.296	0.01
	T1	−0.11	0.248	0.16	0.098	0.04
	T2	0.00	0.967	0.14	0.236	0.02
Cr	All	−0.02	0.827	−0.48	0.000	0.22
	T1	−0.22	0.017	0.16	0.094	0.09
	T2	0.08	0.503	0.17	0.165	0.03
Mn	All	0.16	0.063	−0.22	0.011	0.12
	T1	0.11	0.225	−0.17	0.071	0.05
	T2	0.16	0.170	0.00	0.995	0.03
Fe	All	−0.13	0.170	−0.16	0.087	0.02
	T1	−0.15	0.097	0.23	0.013	0.09
	T2	−0.11	0.368	0.20	0.093	0.06
Zn	All	0.01	0.932	0.09	0.317	0.01
	T1	−0.15	0.115	0.20	0.029	0.08
	T2	0.10	0.408	0.21	0.084	0.04
Rb	All	−0.09	0.308	−0.18	0.059	0.02
	T1	0.23	0.014	0.20	0.035	0.07
	T2	−0.19	0.078	0.35	0.002	0.20
Ba	All	0.17	0.070	−0.07	0.433	0.05
	T1	0.02	0.793	0.20	0.034	0.04
	T2	0.19	0.109	0.21	0.081	0.06
Pb	All	−0.02	0.824	0.06	0.547	0.01
	T1	−0.21	0.030	0.08	0.393	0.06
	T2	0.23	0.051	0.29	0.012	0.10

Significant regression coefficients (β) with p-values are marked in bold