Mining activity is a growing environmental concern as it contributes to heavy metal(loid)s (HMs) pollution in neighboring agricultural soils. Microbial communities play an important role in the biogeochemical cycling of HMs and have the potential to be used as bioindicators. Arsenic (As) and lead (Pb) are the most hazardous HMs and are mainly originated from mining activities. However, paddy soil microbial communities’ response to soil As and Pb pollutant remains overlooked. In this study, the biological and chemical properties of sixteen soil samples from four sites (N01, N02, N03, and N04) near a Pb-Zinc (Zn) mine contaminated with As and Pb at different levels were examined. The results showed that soil pH, total As and Pb, bioavailable As and Pb, nitrate-nitrogen (NO3--N) and ammonia-nitrogen (NH4+-N) were the most important factors in shaping the bacterial community structure. In addition, significant correlations between various bacterial genera and As and Pb concentrations were observed, indicating their potential roles in As and Pb biogeochemical cycling. These findings provide insights into the variation of paddy soil bacterial community in soils co-contaminated with different levels of As and Pb.

中文翻译：

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铅锌矿区附近稻田土壤微生物对砷和铅污染的响应

采矿活动日益引起人们对环境的关注，因为它加剧了附近农业土壤中的重金属（HM）污染。微生物群落在HMs的生物地球化学循环中起着重要作用，并且有潜力被用作生物指示剂。砷（As）和铅（Pb）是最危险的重金属，主要来源于采矿活动。然而，稻田土壤微生物群落对土壤As和Pb污染物的响应仍然被忽视。在这项研究中，研究了在附近被不同水平的As和Pb污染的Pb-Zinc（Zn）矿附近的四个地点（N01，N02，N03和N04）的16个土壤样品的生物学和化学性质。结果表明，土壤pH，总As和Pb，生物利用As和Pb，硝酸盐氮（NO3--N）和氨氮（NH4 + -N）是影响细菌群落结构的最重要因素。此外，观察到各种细菌属与砷和铅浓度之间的显着相关性，表明它们在砷和铅生物地球化学循环中的潜在作用。这些发现为不同水平砷和铅共污染土壤中稻田土壤细菌群落的变化提供了见识。