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首页> 外文期刊>The Science of the Total Environment >Characterization of successional changes in bacterial community composition during bioremediation of used motor oil-contaminated soil in a boreal climate
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Characterization of successional changes in bacterial community composition during bioremediation of used motor oil-contaminated soil in a boreal climate

机译：在北方气候下对用过的机油污染的土壤进行生物修复期间细菌群落组成的连续变化特征

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摘要

The widespread use of motor oil makes it a notable risk factor to cause scattered contamination in soil. The monitoring of microbial community dynamics can serve as a comprehensive tool to assess the ecological impact of contaminants and their disappearance in the ecosystem. Hence, a field study was conducted to monitor the ecological impact of used motor oil under different perennial cropping systems (fodder galega, brome grass, galega-brome grass mixture and bare fallow) in a boreal climate zone. Length heterogeneity PCR characterized a successional pattern in bacterial community following oil contamination over a four-year bioremediation period. Soil pH and electrical conductivity were associated with the shifts in bacterial community composition. Crops had no detectable effect on bacterial community composition or complexity. However, the legume fodder galega increased soil microbial biomass, expressed as soil total DNA. Oil contamination induced an abrupt change in bacterial community composition at the early stage, yet the effect did not last as long as the oil in soil. The successional variation in bacterial community composition can serve as a sensitive ecological indicator of oil contamination and remediation in situ.
机译：机油的广泛使用使其成为在土壤中造成分散污染的显着风险因素。监测微生物群落动态可作为评估污染物对生态系统的影响及其在生态系统中消失的综合工具。因此，进行了一项野外研究，以监测在北方气候区不同多年生作物系统（饲料加勒加，bro草，加勒加-布鲁姆草混合物和裸露的休耕地）下废机油的生态影响。长度异质性PCR表征了四年生物修复期内油污染后细菌群落中的连续模式。土壤pH和电导率与细菌群落组成的变化有关。作物对细菌群落组成或复杂性没有可检测的影响。然而，豆科植物饲料galega增加了土壤微生物的生物量，以土壤总DNA表示。油污污染在早期引起细菌群落组成的突然变化，但这种作用不会持续到土壤中的油污持续很长时间。细菌群落组成的连续变化可以作为油污染和原位修复的敏感生态指标。

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