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首页> 外文期刊>Science of the total environment >Spatial structure of trace elements in extensive biomonitoring surveys with terrestrial mosses
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Spatial structure of trace elements in extensive biomonitoring surveys with terrestrial mosses

机译：陆地苔藓生物监测中微量元素的空间结构

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摘要

The size of the area affected by contamination processes mainly depends on the type of contaminant and the way it is emitted. In regular sampling, the size of the sampling grid will therefore interact with the scale at which the contamination processes are produced, for each contaminant, so that the grid will only enable characterization of those processes that occur at scales larger than the grid, i.e. large scale processes. The present study analysed the data corresponding to tissue concentrations of Cd, Cu, Fe, Hg, Mn, Pb, Se, V and Zn in the terrestrial moss Pseudoscleropodium purum obtained in regular sampling surveys with grids of different sizes (15 × 15, 7.5 × 7.5 km) plus a series of accessory points located at 1 km from the 15 × 15 km sampling grid; all sampling sites were located in Galicia and were sampled in March 2004. The objective of the study was to characterize the interaction between the scale of the sampling grid and the scale at which the contamination processes are produced, for each contaminant, to enable adjustment of the size of the grids to the scale at which the contamination processes are mainly produced. For this purpose, the spatial structure of the concentration of each element was analysed by use of semivariograms created with a robust estimator of the semivariance. The results of the study verified the existence of a real interaction between the scale of the sampling grid and the scale of the contamination processes. The results also demonstrated how in the study area, the contamination processes associated with Cd, Pb and V are generally small scale processes, whereas those associated with Cu, Hg and Se are generally large scale processes.
机译：受污染过程影响的区域大小主要取决于污染物的类型及其排放方式。因此，在常规采样中，对于每种污染物，采样网格的大小将与产生污染过程的规模相互作用，因此，网格将仅能够表征那些规模大于网格（即较大）的过程。规模过程。本研究分析了在不同尺寸（15×15，7.5）网格的常规抽样调查中获得的陆生苔藓假单胞菌pur中与Cd，Cu，Fe，Hg，Mn，Pb，Se，V和Zn的组织浓度相对应的数据×7.5 km）以及距离15×15 km采样网格1 km处的一系列附属点；所有采样点均位于加利西亚，并于2004年3月进行了采样。研究的目的是表征每种污染物的采样网格规模与产生污染过程的规模之间的相互作用，以实现对污染物的调整。网格的大小到主要产生污染过程的规模。为此，通过使用由半方差的鲁棒估计器创建的半方差图来分析每种元素的浓度的空间结构。研究结果证实了采样网格规模与污染过程规模之间存在真正的相互作用。结果还表明，在研究区域中，与Cd，Pb和V有关的污染过程通常是小规模过程，而与Cu，Hg和Se有关的污染过程通常是大规模过程。

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  • 来源
    《Science of the total environment》 |2009年第1期|153-162|共10页
  • 作者

    M.T. Boquete; J.A. Fernandez; J.R. Aboal; C. Real; A. Carballeira;

  • 作者单位

    Ecologia, Facultad de Biologia, Universidad de Santiago de Compostela. 15782 Santiago de Compostela, Spain;

    Ecologia, Facultad de Biologia, Universidad de Santiago de Compostela. 15782 Santiago de Compostela, Spain;

    Ecologia, Facultad de Biologia, Universidad de Santiago de Compostela. 15782 Santiago de Compostela, Spain;

    Ecologia, Escuela Polirecnica Superior, Universidad de Santiago de Compostela, 27002 Lugo, Spain;

    Ecologia, Facultad de Biologia, Universidad de Santiago de Compostela. 15782 Santiago de Compostela, Spain;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    variograms; pseudosderopodium purum; atmospheric contamination; bryophytes;

    机译：变异函数伪假单胞菌大气污染;苔藓植物;

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