Abst'/> Monitoring atmospheric nitrogen pollution in Guiyang (SW China) by contrasting use of Cinnamomum Camphora leaves, branch bark and bark as biomonitors
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Monitoring atmospheric nitrogen pollution in Guiyang (SW China) by contrasting use of Cinnamomum Camphora leaves, branch bark and bark as biomonitors

机译：通过对比使用樟脑叶，枝皮和树皮作为生物监测器来监测贵阳（中国西南）的大气氮污染

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摘要

AbstractMoss (as a reference material) and camphor (Cinnamomum Camphora) leaf, branch bark and bark samples were systematically collected across an urban-rural gradient in Guiyang (SW China) to determine the efficacy of using these bio-indicators to evaluate nitrogen (N) pollution. The tissue N concentrations (0.13%–2.70%) and δ15N values (−7.5‰ to +9.3‰) of all of these bio-indicators exhibited large spatial variations, as they recorded higher values in urban areas that quickly decreased with distance from the city center; moreover, both soil N concentrations and soil δ15N values were found no significant differences within each 6 km from the urban to the rural area. This not only suggests that the different N uptake strategies and variety of N responses of these bio-indicators can be reflected by their different susceptibilities to variations in N deposition but also reveals that they are able to indicate that urban N deposition is mostly from traffic and industry (NOx-N), whereas rural N deposition is mainly from agriculture (NHx-N). Compared to previously collected urban moss and camphor leaf samples, the significantly increased δ15N values in current urban moss and camphor leaf samples further indicate a greater contribution of NOx-N than NHx-N to urban N deposition. The feasibility of using the N concentrations and δ15N values of branch bark and bark as biomarkers of N deposition thus was further confirmed through the comparative use of these bio-indicators. It can be concluded that vascular plant leaves, branch bark and bark can be used as useful biomonitoring tools for evaluating atmospheric N pollution. For further study, quantitative criteria for the practical use of these bio-indicators in response to N deposition should be developed and the differences in the δ15N values of different plant parts should also be considered, particularly in urban environments that are severely disrupted by atmospheric pollution.Graphical abstractDisplay OmittedHighlights•Ability to monitor N pollution using branch bark and bark was further confirmed.•Main N pollution sources were reflected by leaf, branch bark and bark δ15N.•Differences in response to N pollution for the studied biomonitors were revealed.•The importance of different N pollution sources changed over time in Guiyang.The analysis of N and δ15N in camphor leaf, branch bark and bark is a promising method to indicate atmospheric N pollution.
机译： 摘要 青苔（作为参考材料）和樟脑（樟脑）叶，分支皮在贵阳（中国西南部）的城乡梯度范围内系统地收集了树皮和树皮样品，以确定使用这些生物指标评估氮（N）污染的功效。所有这些生物指标的组织氮浓度（0.13％–2.70％）和δ 15 N值（-7.5‰至+ 9.3‰）表现出较大的空间变化，因为他们在市区记录到较高的价值，并随着距市中心的距离而迅速下降；此外，从市区到农村，每6 km内土壤N浓度和δ 15 N值均无显着差异。这不仅表明这些生物指标的不同氮吸收策略和不同的氮响应可以通过其对氮沉降变化的不同敏感性来反映，而且还表明它们能够表明城市氮沉降主要来自交通和气候变化。工业（NO x -N），而农村的氮沉积主要来自农业（NH x -N）。与以前收集的城市苔藓和樟脑叶样品相比，当前城市苔藓和樟脑叶样品中的δ 15 N值显着增加，进一步表明NO < ce：inf loc =“ post”> x -N比NH x -N对城市氮沉降的影响。通过比较使用这些生物活性炭，进一步证实了使用分支树皮和树皮的氮浓度和δ 15 N值作为N沉积生物标志物的可行性。指标。可以得出结论，维管束植物的叶子，分支树皮和树皮可以用作评估大气氮污染的有用生物监测工具。为了进一步研究，应制定这些生物指标对氮沉降的实际使用的定量标准，并且不同的δ 15 N值的差异还应考虑植物部位，尤其是在受到大气污染严重破坏的城市环境中。 图形摘要 省略显示< / ce：simple-para> 突出显示 • 使用分支树皮和树皮进一步监测氮污染的能力得到进一步确认。 • 主要的N污染源被叶子反射，分支树皮和树皮δ 15 N。 • 揭示了所研究生物监测器对氮污染的响应差异。 • 不同N污染源的重要性贵阳市随时间变化。 对樟脑叶，枝皮和树皮中的N和δ 15 N进行分析是指示大气氮污染的一种有前途的方法。

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  • 来源
    《Environmental pollution》 |2018年第2期|1037-1048|共12页
  • 作者

    Yu Xu; Huayun Xiao; Hui Guan; Chaojun Long;

  • 作者单位

    State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences,University of Chinese Academy of Sciences;

    State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences;

    State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences;

    State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences,University of Chinese Academy of Sciences;

  • 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

    Leaves; Branch bark; Bark; δ15N; N deposition;

    机译：叶子;树皮;树皮;δ15N;N沉积;

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