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4 results on '"R Balestrini"'

1. C and N stable isotopes and trace metals in selected organisms from the river Po delta

Author

M. Camusso, W. Martinotti, L. Guzzi, and R. Balestrini

Subjects
Delta, Environmental Engineering, Stable isotope ratio, Health, Toxicology and Mutagenesis, Public Health, Environmental and Occupational Health, Mineralogy, Bioconcentration, General Medicine, General Chemistry, Biology, Pollution, Isotopes of nitrogen, Benthos, Benthic zone, Isotopes of carbon, Environmental chemistry, Environmental Chemistry, Trophic level
Abstract

Carbon and nitrogen stable isotopes and trace metals (Hg, Cd, Cr, Ni, Cu, Pb, Zn) were measured in benthic organisms from the marine area outside the Sacca del Canarin lagoon in the Po delta. The results of δ 13 C and δ 15 N determinations permitted the reconstruction of the foodweb composed of filter-feeders, deposit feeders, fish predators and scavengers. Significant interspecies differences in metal concentrations were found and are discussed in relation to feeding habits and trophic level.

Published
1998

2. Study on throughfall deposition in two north Italian forest sites (Valtellina, Lombardy)

Author

R. Balestrini, L. Galli, G. Tartari, and A. Tagliaferri

Subjects
Hydrology, Environmental Engineering, Ecology, Health, Toxicology and Mutagenesis, Public Health, Environmental and Occupational Health, Alpine climate, General Medicine, General Chemistry, Throughfall, Pollution, chemistry.chemical_compound, Nitrate, chemistry, Dissolved organic carbon, Environmental Chemistry, Environmental science, Spatial variability, Leaching (agriculture), Deposition (chemistry), Chemical composition
Abstract

Throughfall and open field deposition were sampled in two alpine forest catchments in Lombardy characterized by a different degrees of forest decline. The results of two years sampling revealed some interesting differences in the chemical composition of throughfall deposition between the two study areas. The higher concentrations of potassium, calcium, nitrate and dissolved organic carbon (DOC) measured in the Alpe Culino throughfall samples, indicate that the phenomenon of foliar leaching is marked in the area and can be related to the greater forest damage. Large spatial variability of throughfall deposition fluxes within Alpe Culino forest was observed.

Published
1998

3. Use of freshwater mussel Dreissena polymorpha to assess trace metal pollution in the lower River Po (Italy)

Author

M. Camusso, F. Muriano, M. Mariani, and R. Balestrini

Subjects
Environmental Engineering, Health, Toxicology and Mutagenesis, Public Health, Environmental and Occupational Health, Trace element, General Medicine, General Chemistry, Mussel, Biology, Bivalvia, biology.organism_classification, Pollution, Dreissena, Dry weight, Environmental chemistry, Bioaccumulation, Environmental Chemistry, Trace metal, Mollusca
Abstract

Caged freshwater zebra mussels (Dreissena polymorpha) were transplanted for one month to two sites in the lower river Po, northern Italy. Trace metals accumulated in tissues were determined after 15, 30 and (1 station only) 60 days, and were also expressed as metal body burdens. Metals were also determined in Po water samples. No significant differences in metal accumulation in mussel tissues were observed between the two sites. Cd and Pb concentrations increased from 1.23 to 3.22 and 3.40 to 5.93 μg/g dry weight respectively at one site and the same trend was observed at the second site, indicating that these metals accumulated. Cu and Zn concentrations in mussel tissues did not change relative to time zero concentrations. The highest Cr and Ni levels were found after 15 days at both stations (10 and 27 μg/g dry weight respectively). Low and relatively constant Hg concentrations (

Published
1994

4. Use of zebra mussel (Dreissena polymorpha) to assess trace metal contamination in the largest Italian subalpine lakes.

Author

Camusso M, Balestrini R, and Binelli A

Subjects
Animals, Environmental Monitoring, Industry, Italy, Metals, Heavy analysis, Tissue Distribution, Trace Elements analysis, Water Pollutants, Chemical analysis, Bivalvia, Metals, Heavy pharmacokinetics, Trace Elements pharmacokinetics, Water Pollutants, Chemical pharmacokinetics
Abstract

Trace metal (Cd, Co, Cr, Cu, Hg, Ni, Pb and Zn) contamination was evaluated in zebra mussels from the lakes Maggiore, Lugano, Como, Iseo and Garda, which are located in the most highly populated and industrialised area in Italy. Zebra mussels from Lake Maggiore contained the highest concentrations (3.44, 1.51, 4.97, 0.158, 5.87, 346 microg g(-1) for Cd, Co, Cr, Hg, Pb, Zn, respectively) of all metals analysed except Cu and Ni. The lowest levels of most metals were in animals from Garda and Lugano (0.78 and 0.60 microg g(-1) for Cd, 2.87 and 2.03 microg g(-1) for Cr, 0.065 and 0.049 microg g(-1) for Hg, 12.1 and 11.9 microg g(-1) for Ni, 1.96 and 2.46 microg g(-1) for Pb, 158 and 163 microg g(-1) for Zn). The most contaminated sites and possible local sources of metals were identified for each lake, and the lakes classified into quality classes concerning metal pollution.

Published
2001
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