| 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 pp?DDT, pp?DDE and pp?DDD 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 steady-state condition should be expected, lipid normalised concentrations of pp?DDE and pp?DDD 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. © 2010 Springer-Verlag. |
| Source | Environmental science and pollution research international 17 (9), pp. 1508–1518 |
| Keywords | Bioenergetic modelDDTLake MaggioreParticulate matterPelagic food web |
| Journal | Environmental science and pollution research international |
| Editor | Springer, Berlin, Germania |
| Year | 2010 |
| Type | Articolo in rivista |
| DOI | 10.1007/s11356-010-0337-8 |
| Authors | Bettinetti, Roberta; Galassi, Silvana; Guzzella, Licia; Quadroni, Silvia; Quadroni, Silvia; Volta, Pietro |
| Text | 339332 2010 10.1007/s11356 010 0337 8 Scopus 2 s2.0 77957161775 Bioenergetic model DDT Lake Maggiore Particulate matter Pelagic food web The role of zooplankton in DDT biomagnification in a pelagic food web of Lake Maggiore Northern Italy Bettinetti, Roberta; Galassi, Silvana; Guzzella, Licia; Quadroni, Silvia; Quadroni, Silvia; Volta, Pietro Universita degli Studi dell Insubria; Universita degli Studi di Milano; Istituto di Ricerca sulle Acque, Italy; CNR ISE Background In the present study, we report the analytical results of pp DDT, pp DDE and pp DDD 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 steady state condition should be expected, lipid normalised concentrations of pp DDE and pp DDD 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. © 2010 Springer Verlag. 17 Published version http //www.scopus.com/record/display.url eid=2 s2.0 77957161775 origin=inward Articolo in rivista Springer 0944 1344 Environmental science and pollution research international Environmental science and pollution research international Environ. sci. pollut. res. int. Environmental science and pollution research international. Environmental science and pollution research international Print Environmental science and pollution research Print ESPR Print liciamaria.guzzella GUZZELLA LICIA MARIA |
