Key Laboratory of Bio-resource and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu 610065, Sichuan, PR China.
Key Laboratory of Bio-resource and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu 610065, Sichuan, PR China.
Sci Total Environ. 2022 Jan 1;802:149899. doi: 10.1016/j.scitotenv.2021.149899. Epub 2021 Aug 25.
A mass of tailings left by mineral exploitation have caused serious environmental pollution. Although many studies have shown that soil microorganisms have the potential to remediate environmental pollution, the interaction mechanism between microorganisms and the surrounding environment of tailings is still unclear. In this study, 15 samples around pyrite mine tailing were collected to explore the ecological effects of environmental factors on bacterial community. The results showed that most of the samples were acidic and contaminated by multiple metals. Cadmium (Cd), copper (Cu), nickel (Ni) migrated and accumulated to into downstream farmlands while chromium (Cr) was the opposite. Proteobacteria, Chloroflex and Actinobacteria were the dominant phyla. Soil pH, total phosphorus (TP), total nitrogen (TN), available potassium (AK), available phosphorus (AP), the bacteria abundance and diversity all gradually increased with the increase of the distance from the tailing. Invertase, acid phosphatase, total organic carbon (TOC), pH, TP and Cr were the main influencing factors to cause the variation of bacterial community. This work could help us to further understand the changes in soil microbial communities around pollution sources.
大量的矿业尾矿造成了严重的环境污染。尽管许多研究表明，土壤微生物具有修复环境污染的潜力，但微生物与尾矿周围环境的相互作用机制仍不清楚。本研究采集了 15 个黄铁矿尾矿周围的样本，以探讨环境因素对细菌群落的生态影响。结果表明，大多数样本呈酸性，并受到多种金属污染。镉（Cd）、铜（Cu）、镍（Ni）向下游农田迁移和积累，而铬（Cr）则相反。变形菌门、绿弯菌门和放线菌门是主要的优势门。土壤 pH 值、总磷（TP）、总氮（TN）、速效钾（AK）、速效磷（AP）、细菌丰度和多样性均随尾矿距离的增加而逐渐增加。转化酶、酸性磷酸酶、总有机碳（TOC）、pH 值、TP 和 Cr 是导致细菌群落变化的主要影响因素。这项工作有助于我们进一步了解污染源周围土壤微生物群落的变化。
