Per- and Polyfluoroalkyl-Contaminated Freshwater Impacts Adjacent Riparian Food Webs

• DOI: 10.1021/acs.est.0c01640
• Publication Date: 2020-09-01T19:32:01Z
• Authors: Alina Koch; Micael Jonsson; Leo W.Y. Yeung; Anna Kärrman; Lutz Ahrens; Alf Ekblad; Thanh Wang
• Keywords: Aquatic insect; Bioconcentration; Isotope Analysis; Dry weight

The occurrence of per- and polyfluoroalkyl substances (PFASs) in aquatic ecosystems is a global concern because their persistence, potential bioaccumulation, toxicity. In this study, we investigated PFAS-contaminated pond Sweden to assess the cross-boundary transfer PFASs from environment riparian zone via emergent insects. Aquatic terrestrial invertebrates, surface water, sediments, soils, plants were analyzed for 24 including branched isomers. Stable isotope analysis carbon nitrogen was performed elucidate importance diet trophic position PFAS uptake. We present first evidence that can propagate food web Elevated Σ24PFAS concentrations found insect larvae, such as dragon- damselflies, ranging 1100 4600 ng g–1 dry weight (dw), remained high emerged adults (120–3500 dw), indicating exposure risks top predators prey zones. invertebrate consumers, increased with degree aquatic-based at higher levels. Furthermore, stable data together calculated bioaccumulation factors indicated bioconcentration major pathway web.