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Author Barbieri, Edison ♦ Alex, Carlos ♦ Garcia, Re Borges ♦ Passos, Elisangela De Andrade ♦ Aragão, Kennedy A. S. ♦ Alves, Do Patrocínio Hora
Source CiteSeerX
Content type Text
File Format PDF
Subject Domain (in DDC) Computer science, information & general works ♦ Data processing & computer science
Subject Keyword Heavy Metal Concentration ♦ Brazilian Coast ♦ Inshore Specie ♦ Metal Level ♦ Physical Environment ♦ Heavy Metal Pollution ♦ Pelagic Specie ♦ Ses-sile Invertebrate ♦ Up-per Trophic Level ♦ Heavy Metal ♦ Particular Advantage ♦ Whole Food Chain ♦ Oceanic Ecosystem
Abstract Seabirds offer a number of particular advantages as indicators of heavy metal pollution (Walsh 1990, Furness 1994). One of them is they are quite well known. They feed at the up-per trophic levels of oceanic ecosystems and so can provide information on the extent of contamination in the whole food chain (though most metals do not show biodegradation and so, in some cases, there are reasons to prefer the use of ses-sile invertebrates as monitors). Metal levels in birds may give a better picture of hazards to man than measurements in the physical environment, plants or invertebrates. Pelagic species had higher levels of mercury and cadmi-um than did most inshore species, and Nicholson and Osborn (1983) concluded that the levels were natural rather than a consequence of pollution, reasoning that pollution by heavy metals would be more likely to affect inshore species (Muir-
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Research
Education Level UG and PG ♦ Career/Technical Study