Heavy Metal Health Risk Assessment in <i>Picea abies</i> L. Forests Along an Altitudinal Gradient in Southern Romania.

All metals showed a high variability unrelated to altitude, except for As in needles, which showed a decreasing trend ( Figure S2 ).

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In contrast, the Mg and K in needles induced a higher mean ratio with an increasing trend and peaks at 1110, 1160, 1310, and 1554 m.

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