Distribution of microbial abundance in long-term copper contaminated soils from Topolnitsa-Pirdop valley, Southern Bulgaria

Q4 Environmental Science

BioRisk Pub Date : 2023-05-15 DOI:10.3897/biorisk.20.97795

Michaella Petkova, Nadezhda Nankova, Viktoriya Kancheva, S. Boteva, A. Kenarova, G. Radeva

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引用次数: 1

Abstract

This study presents the distribution of bacterial and fungal abundances in long-term copper (Cu) contaminated soils in Topolnitsa-Pirdop valley – a highly industrialized zone with a number of mines and processing plants for copper and other non-ferrous metals. The bacterial (16S rRNA gene copies) and fungal (ITS rRNA gene copies) were estimated using quantitative PCR technique in five topsoils, differently Cu contaminated (ranging from 28.05 to 198.9 mg kg-1). Bacterial abundance varied in a range of 1.68 × 1011 to 3.24 × 101116S rRNA genes, whereas fungi amounted from 1.95 × 108 to 6.71 × 108 ITS rRNA genes. Fungal and bacterial abundances were significantly (fungi) and insignificantly (bacteria) influenced by Cu contamination. The fungal/bacterial ratio related negatively with soil Cu, which shifted microbial communities’ structure towards bacterial dominance. Since the ratio between bacteria and fungi are vital in explaining many soil functions, the calculated changes in this ratio indicated deterioration in soil quality, being of primary importance for plant production.

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保加利亚南部Topolnitsa Pirdop山谷长期铜污染土壤中微生物丰度的分布

本研究介绍了Topolnitsa Pirdop山谷长期受铜污染土壤中细菌和真菌丰度的分布。Topolnitza Pirdop河谷是一个高度工业化的地区，有许多铜和其他有色金属的矿山和加工厂。使用定量PCR技术在五种不同Cu污染（28.05至198.9 mg kg-1）的表土中估计了细菌（16S rRNA基因拷贝）和真菌（ITS rRNA基因副本）。细菌的丰度在1.68×1011到3.24×101116S rRNA基因的范围内变化，而真菌的ITS rRNA基因数量在1.95×108到6.71×108之间。真菌和细菌的丰度受Cu污染的影响显著（真菌）和不显著（细菌）。真菌/细菌比例与土壤Cu呈负相关，使微生物群落结构向细菌优势转变。由于细菌和真菌之间的比率在解释许多土壤功能方面至关重要，因此计算出的这一比率的变化表明土壤质量恶化，这对植物生产至关重要。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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