Document Detail


The effect of sampling design on extensive bryomonitoring surveys of air pollution.
MedLine Citation:
PMID:  15626375     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
In this study, we investigated if the different sampling designs normally used in extensive bryomonitoring surveys of air pollution allow compliance with the objectives proposed in the 'Heavy Metals in European Moss' project. For this, we have used data on concentrations of As, Cu, Se and Zn from five moss sampling surveys carried out in Galicia (NW Spain), using three types of sampling design: regular grid, sampling sites inside squares and the strategy recommended in the guidelines for European surveys. To study the effect of the interaction between the sampling design and the spatial pattern of the presence of contaminants, we have used a simulated and a real pattern onto which we superimposed the three sampling designs considered. We found that only random sampling and grid sampling allow compliance with the proposed objectives, and we discuss the advantages of the latter over the former. The data corresponding to studies using different sampling designs are not comparable, and in future large-scale surveys, the same design must be used if the results are to be compared and if valid conclusions are to be reached. The scale of the grid determines the scale to which the objectives are complied with, so that for correct standardization of the technique, and taking into account the most commonly used grid sizes, we recommend a grid size of 30 x 30 or 32 x 32 km. When additional samplings are required, the size of the grid size should be 30/2(n) or 32/2(n) km.
Authors:
J A Fernández; C Real; J A Couto; J R Aboal; A Carballeira
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  The Science of the total environment     Volume:  337     ISSN:  0048-9697     ISO Abbreviation:  Sci. Total Environ.     Publication Date:  2005 Jan 
Date Detail:
Created Date:  2004-12-31     Completed Date:  2005-03-22     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0330500     Medline TA:  Sci Total Environ     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  11-21     Citation Subset:  IM    
Affiliation:
Area de Ecología, Facultad de Biología, Universidad de Santiago de Compostela, 15782 Santiago de Compostela, Spain. bfjafe@usc.edu
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MeSH Terms
Descriptor/Qualifier:
Air Pollution / analysis*
Bryopsida / chemistry*
Environmental Monitoring / methods*
Reproducibility of Results
Research Design
Spain
Trace Elements / analysis*
Chemical
Reg. No./Substance:
0/Trace Elements

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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