PW10 Bioaccumulation and Biomagnification
Exhibit Hall
8:00 AM - Wednesday
(PW176) Perfluorinated Compounds in Aquatic Organisms at Various Trophic Levels in a Great Lakes Food Chain.
Kannan, K1, Tao, L1, Pastva, S2, Jude, D3, Giesy, J2, 1 Wadsworth Center, New York State Department of Health, Albany, NY 12201-0509, USA2 National Food Safety and Toxicology Center, Michigan State University, East Lansing, MI, USA3 University of Michigan, Ann Arbor, MI, USA
ABSTRACT- Trophic transfer of perfluorooctanesulfonate (PFOS) and other related perfluorinated compounds was examined in a Great Lakes benthic foodweb (water, algae, crayfish, zebra mussels, round gobies and smallmouth bass). In addition, perfluorinated compounds were measured in chinook salmon, lake whitefish, carp, brown trout, green frog, snapping turtle, mink, and bald eagle tissues. PFOS was the most widely detected compound in benthic organisms at various trophic levels. Concentrations of PFOS in benthic invertebrates such as amphipods and zebra mussels were approximately 1000-fold greater than those in surrounding water, which suggested a bioconcentration factor (BCF) of 1000 in benthic invertebrates. Concentrations of PFOS in round gobies were 2 to 4-fold greater than those in their prey organisms such as zebra mussels and amphipods. Concentrations of PFOS in predatory fishes such as chinook salmon and lake whitefish were 10 to 20-fold greater than those in their prey species. Concentrations of PFOS in mink and bald eagles were, on average, 5 to 10-fold greater than those in chinook salmon, carp, or snapping turtles. Because of the accumulation of PFOS in liver and blood, the biomagnification factors of perfluorinated compounds in higher trophic level organisms such as salmonid fishes, mink, and eagles were based on the concentrations in livers or plasma. Overall, these results suggest a BCF of PFOS of approximately 1000 (wholebody based) in benthic invertebrates, and biomagnification factor 10 to 20 in mink or bald eagles relative to those in their prey items. Eggs of fish contained notable concentrations of PFOS suggesting oviparous transfer of this compound.
Key words: Food chain, PFOS, Bioaccumulation, Bald eagles