Abstract
AbstractThe diversity of frequently occurring genera and species of microorganisms in soils polluted by heavy metals (Cu, Ni, Co) and sulfur compounds was investigated at various distances (0.2-50 km) from the Severonikel enterprise in the Kola Peninsula (Russia). The 4 zones studied are described as the epicentre, impact zone (woody vegetation mostly destroyed, with only depressed regeneration of Betula pubescens subsp. czerepanovii), and the buffer and background zones (dwarf shrub pine forests). A decrease of species diversity of fungi, algae and especially the prokaryotic component of microbial communities (viz. the non-spore-forming gram-negative bacteria, cyanobacteria and streptomycetes) was established along the background to epicentre gradient. The homeostasis of the microbial communities of podzolic soils has been changed as a result of heavy metal concentrations in the soils amounting to 300-400 mg kg-1 for copper and 600-700 mg kg-1 for nickel.
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