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首页> 外文期刊>Journal of Environmental Science and Health >Sterols and fatty acid biomarkers as indicators of changes in soil microbial communities in a uranium mine area
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Sterols and fatty acid biomarkers as indicators of changes in soil microbial communities in a uranium mine area

机译：甾醇和脂肪酸生物标志物可作为铀矿区土壤微生物群落变化的指标

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摘要

Included in the 2nd tier of a site specific risk assessment that is being carried out in an abandoned uranium mine (Cunha Baixa uranium mine, Central Portugal), fatty acids biomarkers and sterols were analyzed to assess the impact of soil contamination with metals and radionuclides in the structure of the microbial community in seven sampling sites located at different distances from the mine. Surface soil samples were collected in those sampling sites in the four different seasons of the year. Principal component analysis (PCA) was performed on fatty acid biomarkers and sterols. Subsequently PCA scores obtained for both components were used to test the effect of sites and seasons, on soil samples collected in the Cunha Baixa uranium mine, through bi-factorial ANOVAs. Through PCA analysis, two distinct groups were set apart along the first two components. One group included sites at a great distance from the mine which were negatively correlated with higher contents of iC15:0 and iC17:0, both indicators of Gram-positive bacteria, as well as with ergosterol, cholestanol and cholesterol. The second group, in turn, was composed of the sampling sites most impacted by ore exploration, in situ leaching of poor ore, and spread of sludge from the effluent treatment pond. These sites were positively correlated with higher levels of iC 16:0 (Gram-positive bacteria indicator), cyC17:0 (generally common in gram negative bacteria) and C18:0 and C17:0 biomarkers of non-specific bacteria. The profile of fatty acids obtained in the sampling sites revealed variable predominance of groups of bacteria which are a clear indication of differences in the soil microbial communities that are directly related to the environmental conditions prevailing in the uranium mine area.
机译：在废弃的铀矿（葡萄牙中部的Cunha Baixa铀矿）中进行的特定于现场的风险评估的第二层，分析了脂肪酸生物标志物和固醇，以评估土壤中金属和放射性核素污染的影响。距矿山不同距离的七个采样点的微生物群落结构。在一年的四个不同季节中，在这些采样点收集了地表土壤样品。对脂肪酸生物标志物和固醇进行主成分分析（PCA）。随后，通过双因素方差分析，使用这两种成分获得的PCA分数来测试站点和季节对Cunha Baixa铀矿中收集的土壤样品的影响。通过PCA分析，沿着前两个组件将两个不同的组分开。一组包括距矿山很远的地点，这些地点与革兰氏阳性菌指标iC15：0和iC17：0的含量较高以及麦角固醇，胆固醇和胆固醇呈负相关。第二类依次是受矿石勘探，原矿浸出不良矿石以及污水处理池污泥扩散影响最大的采样点。这些位点与较高水平的iC 16：0（革兰氏阳性细菌指示剂），cyC17：0（通常在革兰氏阴性细菌中常见）以及非特异性细菌的C18：0和C17：0生物标志物呈正相关。在采样点获得的脂肪酸的分布图揭示了细菌群的可变优势，这清楚地表明了土壤微生物群落的差异，这些差异与铀矿区普遍存在的环境条件直接相关。

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  • 来源
    《Journal of Environmental Science and Health》 |2011年第6期|p.659-668|共10页
  • 作者

    MARIA. J. GUEDES; RUTH PEREIRA; KATIA DUARTE; TERESA A.P. ROCHA-SANTOS; SARA C.ANTUNES; FERNANDO GONCALVES; ARMANDO C. DUARTE; ANA C. FREITAS;

  • 作者单位

    CESAM & Department of Biology, University of Aveiro, Aveiro, Portugal;

    CESAM & Department of Biology, University of Aveiro, Aveiro, Portugal;

    ISEIT/ Viseu, Institute Piaget, Estrada do Alto do Gaio, Galifonge, Lordosa, Viseu, Portugal;

    ISEIT/ Viseu, Institute Piaget, Estrada do Alto do Gaio, Galifonge, Lordosa, Viseu, Portugal,CESAM & Department of Chemistry, University of Aveiro, Aveiro, Portugal;

    CESAM & Department of Biology, University of Aveiro, Aveiro, Portugal;

    CESAM & Department of Biology, University of Aveiro, Aveiro, Portugal;

    CESAM & Department of Chemistry, University of Aveiro, Aveiro, Portugal;

    ISEIT/ Viseu, Institute Piaget, Estrada do Alto do Gaio, Galifonge, Lordosa, Viseu, Portugal;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    soil analysis; fatty acids biomarkers; ergosterol; uranium mines; era;

    机译：土壤分析;脂肪酸生物标志物;麦角固醇;铀矿;时代;

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