Document
Birds; Central Mexico; Ecotoxicology; Mining pollution Blood lead; Blood samples; Eco-toxicology; Feeding guilds; Lead concentration; Life span; Me-xico; Polluted sites; Pollution level; Population demographies; Sampling site; Toxic effect; Wild birds; Blood; Concentration (process); Pollution; Lead; lead; animal experiment; animal model; bird; blood analysis; blood sampling; concentration (parameters); conference paper; controlled study; ecotoxicology; frugivore; geographic distribution; granivore; Insectivora; Mexico; mining; nonhuman; omnivore; pollution; pollution monitoring; species difference; Animal Migration; Animals; Animals, Wild; Birds; Ecosystem; Environmental Exposure; Environmental Monitoring; Environmental Pollutants; Industrial Waste; Lead; Mexico; Mining; Aves
Blood lead concentrations in wild birds from a polluted mining region at Villa de la Paz, San Luis Potosí, Mexico
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 (X2 = 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.
lead, 13966-28-4, 7439-92-1; Environmental Pollutants; Industrial Waste; Lead, 7439-92-1
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RDF description of Blood lead concentrations in wild birds from a polluted mining region at Villa de la Paz, San Luis Potosí, Mexico - http://orbis.uaslp.mx/vivo/individual/scopus7489
Article
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Conference Paper
Journal of Environmental Science and Health - Part A Toxic/Hazardous Substances and Environmental Engineering