| Title | Trophic transfer of persistent organic pollutants through a pelagic food web: The case of Lake Como (Northern Italy) |
| Abstract | Despite DDT and PCB having been banned for about 40 years, they are still detectable in the environment. In the present research we specifically investigated the trophic transfer of these organochlorine contaminants (OC) through a pelagic food web of a deep lake in Northern Italy (Lake Como) over time. Zooplankton and fish were sampled each season of a year and OC concentrations and the carbon and nitrogen isotopic ratios were measured. By using stable isotopes, the direct trophic relationship between pelagic zooplankton and zooplanktivorous fish was confirmed for Alosa agone only in summer. Based on this result, the biomagnification factor normalized on the trophic level (BMFTL) for organic contaminants was calculated. BMFTL values were within the range 0.9-1.9 for DDT isomers and 1.6-4.9 for some PCB congeners (PCB 95, PCB 101, PCB 149, PCB 153, PCB 138 - present both in zooplankton and in fish and representing >60% of the PCB contamination), confirming the biomagnification of these compounds in one of the two zooplanktivorous fish species of the lake. (C) 2018 Elsevier B.V. All rights reserved. |
| Source | Science of the total environment 640-641, pp. 98–106 |
| Keywords | delta C-13delta N-15ZooplanktonLake whitefishLandlocked shadDDTPCB |
| Journal | Science of the total environment |
| Editor | Elsevier, Lausanne ;, Paesi Bassi |
| Year | 2018 |
| Type | Articolo in rivista |
| DOI | 10.1016/j.scitotenv.2018.05.307 |
| Authors | Mazzoni, Michela; Boggio, Emanuela; Manca, Marina; Piscia, Roberta; Quadroni, Silvia; Bellasi, Arianna; Bettinetti, Roberta |
| Text | 399603 2018 10.1016/j.scitotenv.2018.05.307 ISI Web of Science WOS 000438408800013 Scopus 2 s2.0 85047602527 delta C 13 delta N 15 Zooplankton Lake whitefish Landlocked shad DDT PCB Trophic transfer of persistent organic pollutants through a pelagic food web The case of Lake Como Northern Italy Mazzoni, Michela; Boggio, Emanuela; Manca, Marina; Piscia, Roberta; Quadroni, Silvia; Bellasi, Arianna; Bettinetti, Roberta University of Insubria, DiSTA, Via Valleggio 11, 22100 Como, Italy; CNR ISE, Largo Tonolli 50, Verbania Pallanza, Italy Despite DDT and PCB having been banned for about 40 years, they are still detectable in the environment. In the present research we specifically investigated the trophic transfer of these organochlorine contaminants OC through a pelagic food web of a deep lake in Northern Italy Lake Como over time. Zooplankton and fish were sampled each season of a year and OC concentrations and the carbon and nitrogen isotopic ratios were measured. By using stable isotopes, the direct trophic relationship between pelagic zooplankton and zooplanktivorous fish was confirmed for Alosa agone only in summer. Based on this result, the biomagnification factor normalized on the trophic level BMFTL for organic contaminants was calculated. BMFTL values were within the range 0.9 1.9 for DDT isomers and 1.6 4.9 for some PCB congeners PCB 95, PCB 101, PCB 149, PCB 153, PCB 138 present both in zooplankton and in fish and representing >60% of the PCB contamination , confirming the biomagnification of these compounds in one of the two zooplanktivorous fish species of the lake. C 2018 Elsevier B.V. All rights reserved. 640 641 Published version Articolo A_2018_IRSA_Science_TE_640_641_98_106.pdf Articolo in rivista Elsevier 0048 9697 Science of the total environment Science of the total environment Sci. total environ. marinamarcella.manca MANCA MARINA MARCELLA roberta.piscia PISCIA ROBERTA |
