Radial patterns of 13 elements in the three rings of beech trees from Mavrovo National Park, FYROM

The radial patterns of 13 elements (N, P, K, Ca, Mg, Fe, Na, Mn, Zn, Cu, Pb, Cd and Co) were analyzed in three rings of European beech (Fagus sylvatica L.). The study site was located in an unpolluted beech ecosystem in Mavrovo National Park. Thus, the obtained radial patterns in the beech trees were considered to be physiologically driven without significant pollution influence. The influence of the main climatic factors (temperature and rainfall) was tested. The radial patterns of individual trees were compared in order to find individual responses to environmental impacts. For most of the elements, higher concentrations were recorded in the pith and outer-most rings and lower in the middle part of the wood. The concentration of heavy metals was low, and followed the physiological patterns of other biogenic elements.