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DRUGS IN BUGS: PPCPS (PHARMACEUTICAL AND PERSONAL CARE PRODUCTS) DETECTED IN STREAM FOOD WEBS ACROSS AN URBAN RURAL GRADIENT (E)

Pharmaceuticals are important contaminants of concern in aquatic environments and are now detected in surface waters worldwide. However, the ecological impacts of PPCPs as well as their bioaccumulation potential (via trophic transfer) are not well understood. We sampled 6 streams across an urban-rural gradient seasonally for 3 years. Using a conceptual model based on two chemical traits, water solubility and metabolic transformation rate, we were able to predict which pharmaceutical compounds had the greatest potential to bioaccumulate. To test bioaccumulation predictions we collected algae, freshwater insects, and riparian spiders and analyzed their stable isotope signatures (to determine trophic position) and pharmaceutical concentration. PPCPs were detected in benthic freshwater insects and in riparian spider tissue; suggesting that some PPCPs do have the potential to bioaccumulate. Further, we then quantified the standing stock of PPCPs occurring in benthic freshwater insects (PPCPs/g insect/m2) in order to calculate the flux of PPCPs to higher consumers via insect consumption. These findings raise important concerns regarding the fate of PPCPs in stream food webs and potential exposure risks to stream and riparian predators feeding on PPCP laden insects.

Authors

Richmond, E. K., Monash University, Australia, erinn.richmond@monash.edu

Rosi-Marshall, E. J., Cary Institute of Ecosystem Studies, USA, rosimarshalle@caryinstitute.org

Walters, D. M., United States Geological Survey, USA, waltersd@usgs.gov

Fick, J., Umea University, Sweden, jerker.fick@umu.se

Grace, M. R., Monash University, Australia, michael.grace@monash.edu

Details

Oral presentation

Session #:098
Date: 03/02/2017
Time: 10:00
Location: 323 C

Presentation is given by student: Yes