| Title | Evaluation of environmental risk of micropollutants in Lake Maggiore, Lugano and other subalpine deep lakes |
| Abstract | DDx, PCBs, PBDEs, Hg and As contamination in sediments (recent layers) and aquatic organisms of different trophic levels (zooplankton, zebra mussel, fish) were analyzed in Lake Maggiore and Lugano, two large deep perialpine lakes, using data deriving from monitoring activities. We analyzed spatial (between sites) and temporal (2001-2015 period) trends of pollution in order to detect potential contamination sources, to compare concentrations with existing Quality Standards (QSs), and to analyze the bioaccumulation/biomagnification process according to a stable isotope approach (SIA). DDx and Hg contamination in Lake Maggiore, derived from past industrial activities in the Pallanza Basin, still exceed QSs both in actual sediments and fish, with potential risks for the ecosystem. Banned from EU in 1985, PCBs accordingly showed low residual values, while PBDE peaks in recent periods in both lakes exceed BQSs, probably due to current industrial activities. The As concentrations reported mainly derives from geochemical origin. The analysis of the biomagnification of toxicants in a pelagic food chain in Lake Maggiore (zooplankton-fish) is also presented here, according both to the Trophic Magnification Factor (TMF) and to the Trophic Level-adjusted BioMagnification Factor (BMFTL): the importance of seasonality and a Hg > DDx ? PBDEs biomagnification capacity were observed. Low PCB concentrations in biota were detected, probably because of an age-dependent biomagnification. |
| Source | I laghi profondi subaloini: dalla ricerca alla gestione, Verbania Pallanza, 25/10/2016 |
| Keywords | subalpine lakesmicropollutantsbiota |
| Year | 2016 |
| Type | Presentazione |
| Authors | Licia Guzzella, Laura Marziali, Stefano Novati, Nadia Casatta, Claudio Roscioli, Marina Manca, Roberta Piscia, Pietro Volta, Aldo Marchetto, Roberta Bettinetti, Carlo Dossi, Andrea Binelli, Marco Parolini, Nicola Solcà |
| Text | 376856 2016 subalpine lakes micropollutants biota Evaluation of environmental risk of micropollutants in Lake Maggiore, Lugano and other subalpine deep lakes Licia Guzzella, Laura Marziali, Stefano Novati, Nadia Casatta, Claudio Roscioli, Marina Manca, Roberta Piscia, Pietro Volta, Aldo Marchetto, Roberta Bettinetti, Carlo Dossi, Andrea Binelli, Marco Parolini, Nicola Solca CNR IRSA, Brugherio Italy CNR ISE, Verbania Pallanza Italy DISTA, University of Insubria, Como Italy Department of Biosciences, University of Milan Italy SPAAS UGRAS, Bellinzona Switzerland DDx, PCBs, PBDEs, Hg and As contamination in sediments recent layers and aquatic organisms of different trophic levels zooplankton, zebra mussel, fish were analyzed in Lake Maggiore and Lugano, two large deep perialpine lakes, using data deriving from monitoring activities. We analyzed spatial between sites and temporal 2001 2015 period trends of pollution in order to detect potential contamination sources, to compare concentrations with existing Quality Standards QSs , and to analyze the bioaccumulation/biomagnification process according to a stable isotope approach SIA . DDx and Hg contamination in Lake Maggiore, derived from past industrial activities in the Pallanza Basin, still exceed QSs both in actual sediments and fish, with potential risks for the ecosystem. Banned from EU in 1985, PCBs accordingly showed low residual values, while PBDE peaks in recent periods in both lakes exceed BQSs, probably due to current industrial activities. The As concentrations reported mainly derives from geochemical origin. The analysis of the biomagnification of toxicants in a pelagic food chain in Lake Maggiore zooplankton fish is also presented here, according both to the Trophic Magnification Factor TMF and to the Trophic Level adjusted BioMagnification Factor BMFTL the importance of seasonality and a Hg > DDx PBDEs biomagnification capacity were observed. Low PCB concentrations in biota were detected, probably because of an age dependent biomagnification. Published version I laghi profondi subaloini dalla ricerca alla gestione Verbania Pallanza 25/10/2016 Nazionale Su invito Evaluation of environmental risk of micropollutants in Lake Maggiore, Lugano presentazione Laghi Profondi 2016 24 ott.pdf Presentazione CASATTA NADIA marinamarcella.manca MANCA MARINA MARCELLA NOVATI STEFANO aldo.marchetto MARCHETTO ALDO liciamaria.guzzella GUZZELLA LICIA MARIA roberta.piscia PISCIA ROBERTA claudiogiovanni.roscioli ROSCIOLI CLAUDIO GIOVANNI pietro.volta VOLTA PIETRO laura.marziali MARZIALI LAURA |
