Scheda di dettaglio – i prodotti della ricerca
| Dato | Valore |
|---|---|
| Title | The role of zooplankton in DDT biomagnification in a pelagic food web of Lake Maggiore (Northern Italy) |
| Abstract | Background In the present study, we report the analytical results of pp2DDT, pp2DDE and pp2DDD determination in lake water, plankton and zooplanktivorous fish of Lake Maggiore (Northern Italy), rather recently polluted by DDT of industrial origin, in order to understand the bottom-up pollution transfer among the abiotic and biotic components of the lake ecosystem. Materials and methods: Fourteen water sampling campaigns were carried out from March 2003 to January 2009 in the water column of the deepest point (Ghiffa) of Lake Maggiore. Suspended and dissolved pollutants were determined separately. Three sampling campaigns were carried out from July 2008 to January 2009 for zooplankton and pelagic fish, and DDT residues were analysed by HRGC coupled with ECD and MS. Moreover, food items were detected in fish stomachs. Results and discussion: Starting from 2007, the DDT contamination along the water column became rather homogeneous, probably because no flooding or other relevant hydrological events occurred; although steadystate condition should be expected, lipid normalised concentrations of pp2DDE and pp2DDD in zooplankton exceeded the levels of the same compounds in zooplanktivorous fishes. Conclusion: As this finding represents a thermodynamic paradox since bioaccumulative pollutant concentrations are expected to increase along the trophic chain, it was supposed that the abiotic and biotic lake components were not in a steady-state condition in Lake Maggiore. |
| Keywords | Lake MaggioreDDTBioenergetic modelParticulate matterPelagic food web |
| Year | 2010 |
| Type | Articolo in rivista |
| Authors | Bettinetti R. (1), Galassi S. (2), Guzzella L. (3), Quadroni S. (1) & P Volta |
| Text | 172542 2010 Lake Maggiore DDT Bioenergetic model Particulate matter Pelagic food web The role of zooplankton in DDT biomagnification in a pelagic food web of Lake Maggiore Northern Italy Bettinetti R. 1 , Galassi S. 2 , Guzzella L. 3 , Quadroni S. 1 P Volta 1 Department of Chemical and Environmental Sciences, University of Insubria, Via Valleggio 11, 22100 Como, Italy 2 Department of Biology, University of Milan, Via Celoria 26, 20133 Milan, Italy 3 CNR IRSA, Via del Mulino 19, 20047 Brugherio, Italy Background In the present study, we report the analytical results of pp2DDT, pp2DDE and pp2DDD determination in lake water, plankton and zooplanktivorous fish of Lake Maggiore Northern Italy , rather recently polluted by DDT of industrial origin, in order to understand the bottom up pollution transfer among the abiotic and biotic components of the lake ecosystem. Materials and methods Fourteen water sampling campaigns were carried out from March 2003 to January 2009 in the water column of the deepest point Ghiffa of Lake Maggiore. Suspended and dissolved pollutants were determined separately. Three sampling campaigns were carried out from July 2008 to January 2009 for zooplankton and pelagic fish, and DDT residues were analysed by HRGC coupled with ECD and MS. Moreover, food items were detected in fish stomachs. Results and discussion Starting from 2007, the DDT contamination along the water column became rather homogeneous, probably because no flooding or other relevant hydrological events occurred; although steadystate condition should be expected, lipid normalised concentrations of pp2DDE and pp2DDD in zooplankton exceeded the levels of the same compounds in zooplanktivorous fishes. Conclusion As this finding represents a thermodynamic paradox since bioaccumulative pollutant concentrations are expected to increase along the trophic chain, it was supposed that the abiotic and biotic lake components were not in a steady state condition in Lake Maggiore. 17 Articolo in rivista pietro.volta VOLTA PIETRO liciamaria.guzzella GUZZELLA LICIA MARIA TA.P04.021.005 Tendenze evolutive della qualita dei corpi idrici superficiali e sotterranei correlazione causa effetto e caratterizzazione. TA.P02.014.003 Distribuzioni ed effetti di macro e micro inquinanti in ambienti acquatici |