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|Biomagnification of anthropogenic and naturally-produced organobrominated compounds in a marine food web from Sydney harbour, Australia|
|Losada, S.; Roach, A.C.; Roosens, L.; Santos, F.J.; Galceran, M.T.; Vetter, W.; Neels, H.; Covaci, A. (2009). Biomagnification of anthropogenic and naturally-produced organobrominated compounds in a marine food web from Sydney harbour, Australia. Environ. Int. 35(8): 1142-1149. dx.doi.org/10.1016/j.envint.2009.07.008|
|In: Environment International: Elmsford NY. ISSN 0160-4120, meer|
Anthropogene factoren; Bromine compounds; Food chain; Kwaliteitszorg; Kwaliteitsbeheersing; Ongewervelden; Polybrominated biphenyls; Quality assurance; Vis; PSE, Australia, New South Wales, Sydney Harbour; Marien; Brak water
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Polybrominated diphenyl ethers (PBDEs) and naturally-produced organobrominated compounds, such as
methoxylated PBDEs (MeO-PBDEs), have been scarcely studied in the Southern Hemisphere. Yet, sources of
the latter group of compounds were found in Southern regions, specifically in Australia. The environmental
distribution and biomagnification potential of organobrominated compounds were therefore investigated in
a representative aquatic food chain (invertebrates and fish) from the Sydney Harbour, Australia. Mean PBDE
concentrations ranged from 6.4 ng/g lipid weight (lw) in squid to 115 ng/g lw in flounder. BDE 47 was the
dominant congener, followed by BDE 100. Mean levels of MeO-PBDEs (sum of congeners 2’-MeO-BDE 68 and
6-MeO-BDE 47) were as high as 110 ng/g lw in tailor, with a slight dominance of 2’-MeO-BDE 68.
Polybrominated hexahydroxanthene derivates (PBHDs), another class of naturally-produced compounds,
were found at variable concentrations and ranged from 4.7 ng/g lw in fanbelly and 146 ng/g lw in tailor. The
tribrominated PBHD isomer dominated in the samples, except for luderick and squid. The lower levels of
PBDEs found in luderick from the harbour compared to those obtained from the upper Parramatta River
indicated a terrestrial (anthropogenic) origin of PBDEs, while the higher levels of MeO-PBDEs and PBHDs in
the samples from the harbour confirmed the marine (natural) origin of these compounds. The highest
trophic magnification factor (TMF) was found for sum PBDEs (3.9), while TMFs for sum MeO-PBDEs and sum
PBHDs were 2.9 and 3.4, respectively. This suggests that biomagnification occurs in the studied aquatic food
chain for anthropogenic brominated compounds, but also for the naturally-produced organobromines.