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Biomagnification of PBDEs in Three Small Terrestrial Food Chains
journal contribution
posted on 2007-01-15, 00:00 authored by Stefan Voorspoels, Adrian Covaci, Jaspers, Hugo Neels, Paul SchepensEight polybrominated diphenyl ethers (PBDE) congeners
(IUPAC nos. 28, 47, 99, 100, 153, 154, 183, and 209) were
measured in passerines (great tits - Parus major), wood mice
(Apodemus sylvaticus), and bank voles (Clethrionomys
glareolus). These data were combined with previously
obtained data on PBDEs in common buzzards (Buteo buteo),
sparrowhawks (Accipiter nisus), and red fox (Vulpes
vulpes). This enabled estimation of the biomagnification
potential of PBDEs in the following three terrestrial food
chains: great tit−sparrowhawk, small rodents−buzzard, and
small rodents−fox. Biomagnification of BDE 209 could
not be assessed because levels of this congener were below
the LOQ in the prey species. All other congeners, except
BDE 28, were biomagnified in both predatory bird species.
Biomagnification of BDE 28 could not be observed from
rodents to buzzard. Biomagnification factors (BMFs) were
calculated as the ratio between the lipid-normalized
concentrations in the predator and in the prey. BMFs
ranged from 2 to 34 for the sum of PBDEs in predatory
bird food chain. Although the fox is a top-predator, this is
not reflected in the PBDE concentrations that were
measured in its tissues. In the small rodent−fox food
chain, no biomagnification could be observed. This observation
is most likely related to the high metabolic capacity of
the fox with regard to organohalogens and should be taken
into account when selecting species for environmental
monitoring purposes. Not all top-predators will give a
representative reflection of the pollution of their habitat,
but confounding factors, such as metabolism, can influence
the results to a great extent and can therefore lead to
misinterpretations.
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Keywords
bank volesrodentlipid-normalized concentrationspolybrominated diphenyl ethersIUPAC nosBiomagnification factorsBMFcongenerBDE 28monitoring purposesbird speciesClethrionomys glareolusVulpes vulpesprey speciesLOQPBDE concentrationsSmall Terrestrial Food ChainsBDE 209representative reflectionbird food chain
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