Bioremediation studies of hydrocarbon-containing cold soils concentrated on the molecular characterization of microorganisms in contaminated and uncontaminated alpine soils (FISH, PLFA, catabolic genotypes, comparative phylogenetic analyses), on the optimization of biodegradation (by testing the effect of various treatments, such as nutrient amendments, inoculation, natural attenuation) and on the monitoring of microbial activity during bioremediation. Low-temperature biodegradation of organic contaminants focused on the degradation potential of alpine bacteria and yeasts (mineral oil hydrocarbons, n-alkanes, phenol, polyaromatic hydrocarbons).