| Blood lead concentrations in wild birds from a polluted mining region at Villa de La Paz, San Luis Potosi, Mexico. | |
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MedLine Citation:
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PMID: 20390847 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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This investigation was undertaken to determine the concentrations of lead in bird blood samples from a mining region in central Mexico and to compare concentrations among several different feeding guilds. The study took place in the Mexican state of San Luis Potosi in a region known as "Villa de la Paz." This is one of the most intensely exploited mining regions in central Mexico and has been actively mined for over four centuries. Lead concentrations from bird blood samples taken from four polluted sites were significantly higher than those from a control, unpolluted site (F = 6.3, P < 0.0002). Similarly, mean blood lead concentrations in birds from a highly polluted site were higher than those from a site that has intermediate pollution levels (P < 0.05). In addition, samples from insectivorous birds had significantly lower lead concentrations compared to granivores, frugivores-insectivores, and omnivores (F = 4.86, P = 0.004), and a large proportion of all individuals had blood lead concentrations indicative of low, sub-lethal toxic effects. Finally, in two polluted sites, remarkably small numbers of insectivore-frugivores, and granivores were trapped, and in one polluted site a large number of insectivores was trapped (X(2) = 29.9, P = 0.03), and no differences in proportions of migrants and non-migrants were found among sampling sites (X(2) = 0.6, P = 0.96). To date, it has not been determined to what extent constant exposure to these levels of pollution can influence health at the individual level, lifespan, and, therefore, population demography of birds from this region. |
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Authors:
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Leonardo Chapa-Vargas; Jose J Mejia-Saavedra; Karina Monzalvo-Santos; Fernando Puebla-Olivares |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering Volume: 45 ISSN: 1532-4117 ISO Abbreviation: J Environ Sci Health A Tox Hazard Subst Environ Eng Publication Date: 2010 |
Date Detail:
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Created Date: 2010-04-14 Completed Date: 2010-07-06 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9812551 Medline TA: J Environ Sci Health A Tox Hazard Subst Environ Eng Country: England |
Other Details:
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Languages: eng Pagination: 90-8 Citation Subset: IM |
Affiliation:
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Division de Ciencias Ambientales, Instituto Potosino de Investigacion Cientifica y Tecnologica AC (IPICyT), San Luis Potosi, Mexico. lchapa@ipicyt.edu.mx |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Animal Migration Animals Animals, Wild Birds / blood* Ecosystem Environmental Exposure* Environmental Monitoring Environmental Pollutants / blood*, toxicity Industrial Waste* Lead / blood* Mexico Mining |
| Chemical | |
Reg. No./Substance:
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0/Environmental Pollutants; 0/Industrial Waste; 7439-92-1/Lead |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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