Important Plant Areas in Italy: From data to mapping

Three hundred and twelve Important Plant Areas (IPAs) have been identified in Italy using a grid-based ranking system to pinpoint areas of high richness and conservation value, alongside the more frequently used expert-based selection of sites. Important Plant Areas are defined as the most important places in the world for wild plant diversity and need to be identified according to common criteria. The main methodological challenges are the lack of recent, easily accessible data for species and habitats and the definition of practical boundaries. The Global Strategy for Plant Conservation (GSPC-CBD) aims to protect 50% of the most important areas for plant diversity and to conserve in situ 60% of the threatened species by 2010. To measure the extent to which the GSPC targets were fulfilled, we assessed the level of protection afforded to the IPAs and species. We identified 351 top ranking cells, which yielded a total of 312 IPAs, covering approximately 15% of Italy. More than 80% of the IPAs currently have some form of legal protection and over 60% of the selected species are included in the existing protected areas. The method we are proposing may be used where no systematic data collection program exists. The transition from grids to polygons is an expert-based passage that exploits different sources of information, such as species point locality data, vegetation maps and expert-based indications. IPAs fit into a wider conservation context and may be applied to the design of ecological networks, the zonation of existing protected areas and the definition of key biodiversity areas. (C) 2010 Elsevier Ltd. All rights reserved.