In calcareous quarries, quarrying can occur in different spatio-temporal phases during a long time span (>10-15 years). The restoration performed during subsequent times of the quarry exploitation, may have different costs and success in terms of soil and biodiversity recovery. From the 2000s, the NW sectors of the Colle Pedrino quarry have been exploited in subsequent temporal phases. The abandoned slopes of the quarry were subject to sequential revegetation actions carried out by different companies, using dissimilar seed mixes on soil substrates deriving from quarry waste material. The aim of this project is to evaluate the success of the different restoration phases at Colle Pedrino, in terms of costs, edaphic environment and biodiversity recovery, compared with the surrounding natural areas. We will take into account: the materials and techniques used in the different recovery phases (soil substrate, seed mixes, etc.). A specific aim is to assess the suitability of the plants, growing in the quarry surrounding, to be used as hayseed for the quarry revegetation. We will use a stratified sampling following the revegetation age of the restored parcels (3x3 m plots). At the end of the project, the cost-benefits of the different restoration actions performed over time will be assessed: costs, edaphic environment and biodiversity. This will allow a cost optimization for the quarry restoration, with a creation of a stable vegetation cover and increased biodiversity levels.

Condividi questo progetto