Scheda di dettaglio – i prodotti della ricerca
| Dato | Valore |
|---|---|
| Title | INTERACTIONS BETWEEN TROPHIC AND TOXIC FACTORS IN A POLLUTED URBAN RIVER |
| Abstract | To investigate how particulate materials and the toxicity of a polluted river can affect biomass production of a particle feeding organism, monthly water samples of the River Lambro were collected upstream and downstream from major pollution sources. These samples were characterized for physical and chemical endpoints, and tested for acute and chronic toxicity (7-day) using Ceriodaphnia dubia. Comparing the effects of unfiltered and filtered water samples, we showed that: (a) despite the higher contamination of the downstream reach, unfiltered (whole) downstream samples often supported a higher biomass production of C. dubia than upstream samples; (b) filtering downstream water samples and thereby removing suspended particulate matter (SPM) controlled this compensatory effect and resulted in a clear inhibition of daphnid biomass production; (c) despite the compensatory and likely nutritional role of particulate materials, an inverse relationship was found between daphnid biomass production and the content of organic carbon of SPM, as well as between the SPM organic content and the temperature of the river. These results show that SPM of the downstream reach can simultaneously exert trophic and toxic effects, and their interaction determines the final result but under the control of major system factors such as water temperature. |
| Source | Ecotoxicology and environmental safety 69(1), pp. 49–57 |
| Keywords | Trophic and toxic effectsCeriodaphnia dubiaSuspended solidsBiomass productionRiver Lambro |
| Journal | Ecotoxicology and environmental safety |
| Editor | Elsevier [etc.], Amsterdam, Netherlands [etc.], Paesi Bassi |
| Year | 2008 |
| Type | Articolo in rivista |
| DOI | 10.1016/j.ecoenv.2007.01.001 |
| Authors | VIGANÒ L., PATROLECCO L., POLESELLO S., PAGNOTTA R. |
| Text | 42294 2008 10.1016/j.ecoenv.2007.01.001 Trophic and toxic effects Ceriodaphnia dubia Suspended solids Biomass production River Lambro INTERACTIONS BETWEEN TROPHIC AND TOXIC FACTORS IN A POLLUTED URBAN RIVER VIGANÒ L., PATROLECCO L., POLESELLO S., PAGNOTTA R. Vigano Luisa, Polesello Stefano, Water Research Institute, CNR, 20047 Brugherio Milan , Italy Patrolecco Luisa, Pagnotta Romano, Water Research Institute, CNR, via Reno 1, 00198 Rome, Italy To investigate how particulate materials and the toxicity of a polluted river can affect biomass production of a particle feeding organism, monthly water samples of the River Lambro were collected upstream and downstream from major pollution sources. These samples were characterized for physical and chemical endpoints, and tested for acute and chronic toxicity 7 day using Ceriodaphnia dubia. Comparing the effects of unfiltered and filtered water samples, we showed that a despite the higher contamination of the downstream reach, unfiltered whole downstream samples often supported a higher biomass production of C. dubia than upstream samples; b filtering downstream water samples and thereby removing suspended particulate matter SPM controlled this compensatory effect and resulted in a clear inhibition of daphnid biomass production; c despite the compensatory and likely nutritional role of particulate materials, an inverse relationship was found between daphnid biomass production and the content of organic carbon of SPM, as well as between the SPM organic content and the temperature of the river. These results show that SPM of the downstream reach can simultaneously exert trophic and toxic effects, and their interaction determines the final result but under the control of major system factors such as water temperature. 69 1 Articolo Pubblicato Articolo Internazionale ISI artEES.pdf Articolo in rivista Elsevier etc. 0147 6513 Ecotoxicology and environmental safety Ecotoxicology and environmental safety Ecotoxicol. environ. saf. Ecotoxicology and environmental safety. Environmental research. Section B EES stefano.polesello POLESELLO STEFANO luisa.patrolecco PATROLECCO LUISA romano.pagnotta PAGNOTTA ROMANO luigi.vigano VIGANO LUIGI TA.P04.021.005 Tendenze evolutive della qualita dei corpi idrici superficiali e sotterranei correlazione causa effetto e caratterizzazione. |