PH11 Bioaccumulation and Biotransformation of POPs
Exhibit Hall
8:00 AM - Thursday, 13 November 2003
(PH112) Evaluation of PCB congener patterns and concentrations in aquatic and terrestrial invertebrates from the Kalamazoo River superfund site, Michigan.
Kay, D1, Neigh, A2, Newsted, J1, Zwiernik, M2, Bradley, P2, Giesy, J2, 1 ENTRIX, Inc., Okemos, MI, USA2 Michigan State University, East Lansing, MI, USA
ABSTRACT- Passerine dietary items including aquatic emergent and terrestrial invertebrates were sampled from a PCB contaminated portion of the Kalamazoo River in Michigan. Congener specific PCB analysis was conducted on nine orders of invertebrates including coleoptera, hemiptera, orthoptera, diptera, trichoptera, ephemeroptera, odonata, hymenoptera, and araneae. Total PCB concentrations varied from 7.2 (mg/kg ww) in coleoptera to 0.15 (mg/kg ww) in orthoptera. Comparison of PCB congener patterns will be presented for the nine insect orders. Predatory insects, including odonata and hymenoptera, exhibited a dramatic shift to higher chorinated congeners relative to the insects that are aquatic emergent and terrestrial herbivores. There were relatively few pattern differences when comparing aquatic emergent and terrestrial insects. Aquatic emergents contained slightly more of the higher chlorinated congeners. The study design also incorporated three distinct sampling rounds, May, July and September, that allow temporal comparison of PCB concentrations and patterns.
Key words: Passerine, PCBs, Pattern analysis, Insect