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Firenze, Italy

Pelacani S.,P. le delle Cascine | Rodolfi G.,P. le delle Cascine | Ugolini F.C.,P. le delle Cascine
IAHS-AISH Publication

We investigated suspended and dissolved loads of two streams which drain into the Bilancino reservoir, the principal water supply of Florence in Italy. In northern Apennine, headwater catchments have been affected by mass movements. In the Bilancino watershed, more than 50% of the landslides are directly connected with the streams, which otherwise tend to transport little sediment due to the presence of 89 check dams, one for each square kilometre. Suspended sediment was monitored for two years using time-integrated sediment traps. One stream, which was impacted by road construction, had a suspended sediment yield of 116 t km-2 year-1, while a nearby non-impacted stream had a yield of 14 t km-2 year-1. The stream water chemistry was also affected by the highway construction, which has produced spoils containing albite and Na-bearing olistostrome. The calculated cation flux was 416 t km-2 year-1 for the impacted watershed and 210 t km-2 year-1 for the non-impacted one. Copyright © 2010 IAHS Press. Source

Mancuso S.,P. le delle Cascine | Taiti C.,P. le delle Cascine | Bazihizina N.,P. le delle Cascine | Costa C.,Italian Agricultural Research Council | And 5 more authors.
Applied Soil Ecology

We analyzed the volatile organic compounds (VOCs) emitted from different soils by using the PTR-MS-TOF technique under laboratory conditions and compared them with soil chemical biochemical activities. The emitted VOCs were related to soil microbial biomass, soil respiration and some soil enzyme activities so as to evaluate if size and activity of soil microbial communities influenced the soil VOCs profiles. Our results showed that the emitted VOCs discriminated between soils with different properties and management, and differences in the VOCs emission profiles were likely related to the active metabolic pathways in the microbial communities of the three studied soil. Our results also showed that some soil enzyme activities such as β-glucosidase and arylsulfatase were possibly involved in the release of compounds fueling microbial metabolic pathways leading to the production of specific VOCs. It was concluded that the PTR-MS-TOF technique is suitable for analyze VOCs emission from soil and that studies comparing soil enzyme activities and soil volatile profiles can reveal the origin of VOCs and give further insights on microbial activity and soil functionality. © 2014 Elsevier B.V. Source

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