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Abstract <p>The use of metagenomic analysis of soil microbial community has been developed in recent years to monitor changes related to soil contamination with heavy metals. The effect has been studied of extremely high concentrations of heavy metals on the microbial cenosis of mountain meadow chernozems-like soil (Eutric Mollic Leptosol) in the impact zone of the tailings of the Urup Mining and Processing Plant. As a result of the research, the authors compared the metagenomes of soil susceptible to polymetallic contamination and uncontaminated (reference) soil. The content of nine heavy metals in the soil at the monitoring site exceeded the background value by 6 to 63 times. Analysis of the metagenome of contaminated soil resulted in identifying indicator groups of microorganisms associated with polymetallic contamination. However, heavy metal pollution has caused obvious changes in the structure of the microbial community, rather than in microbial diversity, since the same physicochemical properties of soils control microbiomes. This study confirms the complexity of the microbial response to complex polymetallic contamination and will be useful in future to study the long-term response and resistance mechanism of the soil microbiome. As a result of the analysis of the metagenome of soil contaminated with heavy metals near the tailing dump, minor changes in the relative abundance of bacterial groups associated with polymetallic contamination were revealed. A decrease in abundance was observed for several minor genera of actinobacteria <i>Thermoleophilia</i> and <i>Rubrobacteria</i> classes, namely, <i>Conexibacter</i>, <i>Capillimicrobium</i>, <i>Paraconexibacter</i> and <i>Baekduia</i>. However, the overall biodiversity of microbial cenosis did not decrease.</p>

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Metagenomic Profiling of the Soil Microbiological Community in the Impact Area of the Urup Mining and Processing Plant Tailings (Karachay-Cherkess Republic)

  • 期刊论文

  • 发表日期：

    2025年8月5日

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  • E. S. Khrapai,
  • S. I. Kolesnikov,
  • A. A. Kuzina,
  • K. Sh. Kazeev,
  • T. V. Minnikova,
  • K. A. Demin,
  • Yu. N. Kocharovskaya,
  • Ya. A. Delegan,
  • A. G. Bogun,
  • T. M. Minkina,
  • S. N. Sushkova

摘要

Abstract

The use of metagenomic analysis of soil microbial community has been developed in recent years to monitor changes related to soil contamination with heavy metals. The effect has been studied of extremely high concentrations of heavy metals on the microbial cenosis of mountain meadow chernozems-like soil (Eutric Mollic Leptosol) in the impact zone of the tailings of the Urup Mining and Processing Plant. As a result of the research, the authors compared the metagenomes of soil susceptible to polymetallic contamination and uncontaminated (reference) soil. The content of nine heavy metals in the soil at the monitoring site exceeded the background value by 6 to 63 times. Analysis of the metagenome of contaminated soil resulted in identifying indicator groups of microorganisms associated with polymetallic contamination. However, heavy metal pollution has caused obvious changes in the structure of the microbial community, rather than in microbial diversity, since the same physicochemical properties of soils control microbiomes. This study confirms the complexity of the microbial response to complex polymetallic contamination and will be useful in future to study the long-term response and resistance mechanism of the soil microbiome. As a result of the analysis of the metagenome of soil contaminated with heavy metals near the tailing dump, minor changes in the relative abundance of bacterial groups associated with polymetallic contamination were revealed. A decrease in abundance was observed for several minor genera of actinobacteria Thermoleophilia and Rubrobacteria classes, namely, Conexibacter, Capillimicrobium, Paraconexibacter and Baekduia. However, the overall biodiversity of microbial cenosis did not decrease.