Background Concentrations of Chemical Elements in Plants Inhabiting the Northern Part of Western Siberia and Changes They Undergo under the Impact of Oil and Gas Production

Concentrations of chemical elements (Na, K, Ca, Cu, Zn, Fe, Pb, Sr, Zr, Cd, Ni, Co, Cr, Ba, Cd, and Mn) in 17 plant species inhabiting the northern part of Western Siberia have been determined on the basis of data collected in the course of long-term (1993–2022) studies. The regional geochemical background of predominant plant species is determined, and changes in the chemical composition of plants in the vicinity of oil and gas condensate fields in the northern part of Western Siberia are analyzed. Indicator species reflecting early trends in ecosystem transformations under the impact of anthropogenic pressure and associations of chemical elements typical for various pollution sources are proposed. It is demonstrated that phytoindication can be used to detect subtle environmental changes in the vicinity of gas condensate fields.