Abstract
<jats:p>Relevance. The need to study the impact of high fire temperatures on the migration of chemical elements and substances in biological objects since the frequency and severity of fires increases every year. Aim. To assess the impact of forest fires of the crown type on the element composition of plants growing in post pyrogenic areas. Methods. Cross concentrations of microelements (Mn, Zn, Co, Ni, Cu, Pb, Cd, Hg) were determined by atomic absorption spectrometry (Soolar M6, Thermo Electron, England), Hg – by the «cold steam» method using amalgamation on gold sorbent (spectrometer Perkin-Elmer (USA)). Results and conclusions. the authors have carried out the analysis of soils and plant samples (fireweed (Chamérion angustifólium (L.) Holub), mosses (Hylocomium splendens (Hedw.) B. S. G.), lichens (Cladonia Stellaris (Opiz) Brodo)) taken from background and post-pyrogenic areas subjected to a crown fire in the Karakansky Bor, Novosibirsk region. To study the degree of accumulation of elements by plants from the soil, depending on the type of surface on which they grow, accumulation coefficients were determined on background and post-pyrogenic surfaces. It was established that crown forest fires lead to a decrease in the content of bulk forms of Mn, Zn, Pb, Cd, Hg in a soil layer 5 cm deep and in lichens, and Mn, Zn, Pb, Cd, Cu, Ni, Co, Hg in mosses. The authors determined the increase in the content of Cu and Ni by 60% in stems, Mn by 80% in fireweed leaves, Co by 40% in lichens. Fireweed leaves absorb Cd by aerosol transfer and when taken up from the soil through the root system, as evidenced by Cd accumulation coefficient of 1.9 on unburned area. Low accumulation coefficients in lichens show that the main method of absorption of microelements in them occurs through the atmospheric transfer of soil dust particles and aerosol smoke emissions.</jats:p>