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Ecological Effects of Heavy Metal Pollution on Soil Microbial Community Structure and Diversity on Both Sides of a River around a Mining Area.
International Journal of Environmental Research and Public Health ( IF 4.614 ) Pub Date : 2020-08-06 , DOI: 10.3390/ijerph17165680
Xingqing Zhao 1 , Jian Huang 1 , Xuyan Zhu 1 , Jinchun Chai 2 , Xiaoli Ji 3
Affiliation  

The objectives of this study were to understand the characteristics of heavy metal pollution caused by mining activities on the two sides of the Shun’an river and the response of soil microorganisms to the habitats by different contamination levels and vegetation. This paper selected soil samples from the banks of the Shun’an River near the Shizishan mining area, which is at the left of the river, in Tongling, Anhui Province, China. Using Illumina MiSeq 2500 technology, we analyzed the relationship between environmental factors and microbial communities. As the distance from the mining area increased, the heavy metal comprehensive pollution and potential risk value decreased. Additionally, the pollution severity and risk value of the left bank, where the mining area lies, were generally higher than those of the right bank. Because the symmetric sampling points on both banks of the river had similar planting types, their environmental factors and microbial community structure were similar and clustered. However, under different vegetation, the paddy soils tended to have a higher nutrient content and community richness and diversity than the vegetable fields or the abandoned land. It was found that soil microbial communities in this area were mostly affected by pH and Nemerow pollution index (PN). The pH significantly affected the abundance and structure of most microorganisms. In addition, Proteobacteria, Acidobacteria, and Bacteroidetes had significant tolerance to Zn, Pb, and Cd. By exploring the potential use of these tolerant microorganisms, we seek to provide strains and the theoretical basis for the bioremediation of areas contaminated by heavy metal.

中文翻译:

重金属污染对矿区周围河流两侧土壤微生物群落结构和多样性的生态影响。

本研究的目的是了解顺安河两岸采矿活动引起的重金属污染特征,以及不同污染水平和植被对土壤微生物对生境的响应。本文从安徽省铜陵市紫石山矿区附近的顺安河两岸的土壤样本中选出。使用Illumina MiSeq 2500技术,我们分析了环境因素与微生物群落之间的关系。随着距矿区距离的增加,重金属综合污染和潜在风险值降低。此外,采矿区所在的左岸的污染严重程度和风险价值通常高于右岸。由于这条河两岸的对称采样点具有相似的种植类型,因此它们的环境因素和微生物群落结构是相似且聚集的。但是,在不同植被下,稻田土壤的养分含量,群落丰富度和多样性往往比菜田或荒地高。结果发现,该地区的土壤微生物群落主要受pH和Nemerow污染指数(PN)。pH值显着影响大多数微生物的丰度和结构。另外,变形杆菌,酸性杆菌和拟杆菌对锌,铅和镉具有显着的耐受性。通过探索这些耐性微生物的潜在用途,我们寻求为重金属污染区域的生物修复提供菌株和理论基础。
更新日期:2020-08-06
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