Biomanipulation impacts on per-and polyfluoroalkyl substances accumulation and trophic transfer in an eutrophic lake

[Display omitted] •Widespread contamination of PFASs was found in environmental compartments in Wuliangsuhai Lake.•Biomanipulation through species introduction changed food web structure in Wuliangsuhai Lake.•Lower concentrations of PFASs in fish species were observed in biomanipulation area in Wuliangsuhai Lake.•Biomanipulation through species addition increased trophic magnification factors of PFASs. Manipulation of freshwater food web through species introduction has been used to control the increasing algae in the Wuliangsuhai Lake, which affects not only the pathways of carbon source and energy transfer, but also the transfer of contaminants through food web. Food web relationships between biomanipulation area (BMA) and non-biological manipulation area (NBMA) were investigated using stable carbon (δ13C) and nitrogen (δ15N) isotope analysis. In BMA, the δ13C values in fish species were enriched while δ15N depleted due to the increased inter-species competition. Among the same fish species between BMA and NBMA, lower trophic levels were observed in BMA. Concentrations of target PFASs (ΣPFAS) in fish from BMA were significantly (p