Spatial variability of Diporeia spp. bioaccumulation of PCBs in Lake Michigan

Conference · Sun Dec 31 04:00:00 EST 1995

OSTI ID:458345

Hsieh, J L; Hoof, P Van; Robinson, S ^[1]

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1. Univ. of Michigan, Ann Arbor, MI (United States)

To verify the applicability of the equilibrium partitioning model for assessing PCB bioaccumulation in benthic invertebrates, Diporeia spp. and surficial sediments were collected at various sites from lake Michigan. A pilot study examining three animals sizes showed similar PCB congener Biota/Sediment Accumulation factors for medium and large size animals. Among small size animals, BSAFs were 2 to 9 times higher, depending on log K{sub ow}, when compared to the other two size groups. Spatial variability at depths < 80 m were examined for amphipods > 3 mm. At northern stations, where % lipid range from 30--40%, lipid normalized BSAFs increase with increasing log K{sub ow} up to a log K{sub ow} value of approximately 6.5 after which BSAFs plateau or even decline. At southern stations, where % lipid generally range from 16--23%, BSAFs are positively correlated with log K{sub ow}. Results of statistical analyses of environmental parameters, such as sediment contamination, organism lipid level and composition, will be discussed.

• OSTI ID: 458345
• Report Number(s): CONF-961149--
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
56 BIOLOGY AND MEDICINE
APPLIED STUDIES
BIOLOGICAL ACCUMULATION
BIOLOGICAL INDICATORS
CRUSTACEANS
LAKE MICHIGAN
POLYCHLORINATED BIPHENYLS
WATER POLLUTION