Chemical Elemental Composition of Soils and Plants of the Western Taimyr Floodplain Landscapes

Changes in the properties of alluvial soils, the content of chemical elements N, P, K, Ca, Mg, Na, Fe, Mn, Zn, Cu, Co, Mo, B, S, As, Cd, Cr, Ni in soils and plants of the genera Carex, Salix, Eguisetum and the family Poaceae were studied In the floodplain landscapes of the Norilsk-Pyasina lake-river system in the direction the Daldykan River–the Ambarnaya River–Lake Pyasino–the Pyasina River–the Kara Sea. Natural factors were found to determine the differences in granulometric composition of soils, increased content of Cu, Ni and Co in soils and plants, surplus Fe and Mn and insufficient content of P, Zn and Mo in plants. The impact of technogenic contamination of the floodplains of the Daldykan, and Ambarnaya Rivers up to Lake Pyasino was proven to increase soil acidity and total Cu, Ni and Co content, as well as the concentration of the mobile forms of S–SO4, Ni, Cu, Co, Cr. Due to the changes in the composition and properties of contaminated soils, plants accumulated Cu, Co and B in excess and Ni in toxic concentrations for plants and animals. Both natural and technogenic factors determined the increased content of content of As, Cd, Hg, and Pb in plants as compared with their Clarke number, but not exceeding the maximal allowable concentrations in forage plants, and a reduced content of P, Ca, Zn, Mo in plants, making it insufficient for the normal supply of the elements to agricultural animals. Since the proportion of territories with anthropogenically contaminated soils and plants in the total area of the floodplain landscapes of Western Taimyr is lowl, their negative impact on the diet of reindeer in the region will be insignificant.