Abstract:
Biogeochemistry has an increasingly important place in complex studies of the natural environment. Among its tasks are the study of the content of ecologically priority heavy metals in vegetation, as well as laying the foundations in the organization of geochemical monitoring of the natural environment. Biogeochemical studies are an important part of uncovering the geochemical features of landscapes in a given area. On the basis of the field and laboratory studies of trace elements (Cu, Zn, Pb, Mn, Ni, Co, Cr) in the vegetation cover of Thassos, their content and degree of interaction in the soil-plant system was analyzed and inferred using the biological uptake coefficient – Ah. The factors influencing the formation of the trace element composition of plants are indicated. Associations of heavy metals accumulating or dissipating in the studied object are revealed. The trace element association with the highest degree of accumulation is Zn, Cu and Pb, while nickel and chromium are trapped to a lower degree compared to the other heavy metals. A geochemical comparison is made with another biogeochemically studied site located relatively close to the island of Thassos – Mount Athos. The obtained data are the basis for the establishment and implementation of systematic geoecological observations on Thassos and the organization of biogeochemical monitoring on the priority heavy metals for ecological research. This paper is a continuation of the complex landscape geochemical studies of the island.