| Title | Trophic magnification of legacy (PCB, DDT and Hg) and emerging pollutants (PFAS) in the fish community of a small protected southern alpine lake (Lake Mergozzo, Northern Italy) |
| Abstract | The biomagnification of mercury, polychlorobiphenyls (PCBs), dichlorodiphenyltrichl oroethane and its metabolites (DDTs) and perfluoroalkyl acids substances (PFASs) was evaluated in the trophic web of Lake Mergozzo, a small and deep Italian subalpine lake, which has been chosen because it is a protected environment, and discharges into the lake are mostly avoided. Carbon source and relative trophic levels were calculated by using C and N stable isotopes, respectively, and trophic magnification factors (TMFs) were derived. Zooplankton and thirteen species of fish were collected and analyzed, and the results showed the elevated level of biota contamination from both legacy and emerging pollutants, even if direct discharges were avoided. Concentrations in biota, expressed as sums of compounds, ranged from 0.4 to 60 ?g kg wet weight (ww) for PFASs, from 16 to 1.3 104 ?g kg lipid content (lw) for DDTs, from 17 to 1.5 104 ?g kg lw for PCBs and from 20.0 to 501 ?g kg ww for mercury (Hg). TMFs of this deep, cold lake, with a prevalent pelagic trophic chain, were high and clearly indicated fish biomagnification, except for PFAS. The biomagnification capability of PFAS in a fish-only food web was discussed by using the biomagnification of Hg as a benchmark for assessing their bioaccumulation potential. |
| Source | Water (Basel) 12 (6) |
| Keywords | BioaccumulationHgLake fishOrganochlorine compoundsPFASTrophic magnification factor |
| Journal | Water (Basel) |
| Editor | Molecular Diversity Preservation International, Basel, |
| Year | 2020 |
| Type | Articolo in rivista |
| DOI | 10.3390/W12061591 |
| Authors | Mazzoni, Michela; Ferrario, Claudia; Bettinetti, Roberta; Piscia, Roberta; Cicala, Davide; Volta, Pietro; Borgå, Katrine; Valsecchi, Sara; Polesello, Stefano |
| Text | 472358 2020 10.3390/W12061591 Scopus 2 s2.0 85087452835 Bioaccumulation Hg Lake fish Organochlorine compounds PFAS Trophic magnification factor Trophic magnification of legacy PCB, DDT and Hg and emerging pollutants PFAS in the fish community of a small protected southern alpine lake Lake Mergozzo, Northern Italy Mazzoni, Michela; Ferrario, Claudia; Bettinetti, Roberta; Piscia, Roberta; Cicala, Davide; Volta, Pietro; Borgå, Katrine; Valsecchi, Sara; Polesello, Stefano Consiglio Nazionale delle Ricerche; Universitetet i Oslo; Universita degli Studi dell Insubria; CNR Water Research Institute IRSA The biomagnification of mercury, polychlorobiphenyls PCBs , dichlorodiphenyltrichl oroethane and its metabolites DDTs and perfluoroalkyl acids substances PFASs was evaluated in the trophic web of Lake Mergozzo, a small and deep Italian subalpine lake, which has been chosen because it is a protected environment, and discharges into the lake are mostly avoided. Carbon source and relative trophic levels were calculated by using C and N stable isotopes, respectively, and trophic magnification factors TMFs were derived. Zooplankton and thirteen species of fish were collected and analyzed, and the results showed the elevated level of biota contamination from both legacy and emerging pollutants, even if direct discharges were avoided. Concentrations in biota, expressed as sums of compounds, ranged from 0.4 to 60 g kg wet weight ww for PFASs, from 16 to 1.3 104 g kg lipid content lw for DDTs, from 17 to 1.5 104 g kg lw for PCBs and from 20.0 to 501 g kg ww for mercury Hg . TMFs of this deep, cold lake, with a prevalent pelagic trophic chain, were high and clearly indicated fish biomagnification, except for PFAS. The biomagnification capability of PFAS in a fish only food web was discussed by using the biomagnification of Hg as a benchmark for assessing their bioaccumulation potential. 12 Published version http //www.scopus.com/record/display.url eid=2 s2.0 85087452835 origin=inward Articolo in rivista Molecular Diversity Preservation International 2073 4441 Water Basel Water Basel Water Basel Water. Basel FERRARIO CLAUDIA stefano.polesello POLESELLO STEFANO roberta.piscia PISCIA ROBERTA pietro.volta VOLTA PIETRO saramaria.valsecchi VALSECCHI SARA MARIA |
