NDLI: The importance of exogenous contamination on heavy metal levels in bird feathers. A field experiment with free-living great tits, <i>Parus major</i>

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The importance of exogenous contamination on heavy metal levels in bird feathers. A field experiment with free-living great tits, Parus major

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The importance of exogenous contamination on heavy metal levels in bird feathers. A field experiment with free-living great tits, Parus major

Content Provider	Royal Society of Chemistry (RSC)
Author	Veerle, Jaspers Marcel, Eens Ronny, Blust Rianne, Pinxten Tom, Dauwe Lieven, Bervoets
Copyright Year	2004
Abstract	Feathers have been used extensively as non-destructive biomonitors for heavy metal pollution. Birds excrete heavy metals into growing feathers during moult. After feather formation, the feathers become isolated from the rest of the body, suggesting that the feathers contain information of circulating heavy metal concentrations in the blood at the time of their development. However, heavy metal levels may change due to exogenous contamination, resulting in higher concentrations in feathers that are exposed most to exogenous conditions. We studied the effect of exogenous contamination in free-living adult great tits (Parus major) by measuring – within the same individual – the concentrations of twelve heavy metals (Ag, Al, As, Cd, Co, Cu, Fe, Hg, Mn, Pb, Tl and Zn) in three outermost tail feathers that were exposed to exogenous contamination for different periods of time. In particular, for each individual heavy metal levels in the removed left outermost tail feather were compared with levels in the regrown left and the right outermost tail feather, that were both removed 40 days after removal of the original left feather. This study revealed that, with the exception of mercury, the concentration of all heavy metals was significantly different among the three outermost tail feathers. Our results suggest that concentrations of most heavy metals build up with increasing age of the feather, indicating that exogenous contamination may be an important source of heavy metals in feathers. However, we found no significant differences in Hg concentrations and we found only small differences in Zn concentrations among tail feathers. Consequently, the concentrations of zinc and mercury in feathers are probably primarily due to endogenous deposition.
Starting Page	356
Ending Page	360
Page Count	5
File Format	HTM / HTML PDF
ISSN	14640325
Volume Number	6
Issue Number	4
Journal	Journal of Environmental Monitoring
DOI	10.1039/b314919f
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Cu Parus Al Zn Heavy metals Moulting Great tit Lead Methylmercury Zinc
Content Type	Text
Resource Type	Article
Subject	Public Health, Environmental and Occupational Health Management, Monitoring, Policy and Law

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