ambientale, sapienza università di roma, roma, italy; f Dipartimento di scienze e tecnologie Biologiche ed ambientali, università del salento, lecce, italy; g istituto Beni culturali, regione emilia-romagna, Bologna, italy; h centro conservazione Biodiversità (ccB), Dipartimento di scienze della Vita e dell'ambiente (DisVa), università di cagliari, cagliari, italy; i scuola di Bioscienze e medicina Veterinaria, università di camerino, macerata, italy; j Dipartimento di scienze della Vita, università di modena e reggio emilia, modena, italy; k Dipartimento di scienze della terra, dell'ambiente e della Vita (DistaV), università di genova, genova, italy; l Dipartimento di Biologia, ecologia, e scienze della terra (DiBest), università della calabria, cosenza, italy; m Dipartimento di scienze della Vita e Biologia dei sistemi (DBios), università di torino, torino, italy; n comitato scientifico, museo regionale di scienze naturali efisio noussan, aosta, italy; o sezione di Botanica filippo Parlatore, museo di storia naturale, università di firenze, firenze, italy; p Dipartimento di Biologia, università di napoli federico ii, napoli, italy; q Dipartimento di scienze agrarie, alimentari e forestali, università di Palermo, Palermo, italy; r scuola di scienze agrarie, forestali, alimentari ed ambientali, università della Basilicata, Potenza, italy; s strada Val san martino superiore, torino, italy; t centro ricerche floristiche marche, Pesaro, italy; u Dipartimento di Pianificazione, Design, tecnologia dell'architettura (PDta), sapienza università di roma, roma, italy; v Department of Botany, national museum of natural history, smithsonian institution, washington, Dc, usa; w Via isonzo, massa, italy; x Dipartimento di scienze della terra, università di torino, torino, italy; y Via regazzoni Bassa, Padova, italy; z museo di storia naturale della calabria ed orto Botanico, università della calabria, cosenza, italy; aa Dipartimento di scienze della Vita, università di trieste, trieste, italy; ab fondazione museo civico di rovereto, trento, italy; ac sezione di Botanica ed ecologia Vegetale, Dipartimento di scienze e tecnologie Biologiche, chimiche e farmaceutiche (steBicef), università di Palermo, Palermo, italy; ad Dipartimento di scienze agrarie e forestali (Dafne), università della tuscia, Viterbo, italy; ae Via europa unita, schio, italy; af istituto per le Piante da legno e l'ambiente (iPla), torino, italy; ag laboratori di Botanica, Dipartimento di scienze delle Produzioni agroalimentari e dell'ambiente, università di firenze, firenze, italy; ah largo Brigata cagliari, Vercelli, italy; ai Dipartimento di scienze e tecnologie ambientali, Biologiche e farmaceutiche, università della campania luigi Vanvitelli, caserta, italy;
The Vegetation Prodrome of Italy was promoted in 2012 by the Italian "Ministry of Environment, Land and Sea Protection", in collaboration with the "Italian Society of Botany", to provide a comprehensive and systematic catalogue and description of Italian plant communities. The Prodrome that is presented in this paper is the first full organic synthesis of the vegetation of Italy at the alliance syntaxonomic level. It fulfils several needs, the main one being a unified and comprehensive national framework that may make an important contribution to the definition of the European Vegetation Prodrome. Syntaxonomy, as well as taxonomy, is sometimes based on considerations that may in part diverge: several authors tend to favour models that are divisive or aggregative to a greater or lesser extent in terms of flora, biogeography and ecology. These different points of view stimulate the scientific debate and allow the adoption of a framework that is more widely supported. The Prodrome includes 75 classes, 2 subclasses, 175 orders, 6 suborders and 393 alliances. The classes were grouped into nine broad categories according to structural, physiognomic and synecological elements rather than to syntaxonomic criteria. The rank, full valid name, any synonymies and incorrect names are provided for each syntaxon. The short declaration highlights the physiognomy, synecology, syndynamics and distribution of the plant communities that belong to the syntaxon. The Prodrome of the Italian Vegetation is linked to the European Strategy for Biodiversity, the European Habitats Directive and the European Working Groups related to the ecosystems and their services. In addition to basic applications, the Prodrome can be used as a framework for scientific research related to the investigation of the relationships between plant communities and the environmental factors that influence their composition and distribution
Invasive alien plants are a major threat to biodiversity and they contribute to the unfavourable conservation status of habitats of interest to the European Community. In order to favour implementation of European Union Regulation no. 1143/2014 on invasive alien species, the Italian Society of Vegetation Science carried out a large survey led by a task force of 49 contributors with expertise in vegetation across all the Italian administrative regions. The survey summed up the knowledge on impact mechanisms of invasive alien plants in Italy and their outcomes on plant communities and the EU habitats of Community Interest, in accordance with Directive no. 92/ 43/EEC. The survey covered 241 alien plant species reported as having deleterious ecological impacts. The data collected illustrate the current state of the art, highlight the main gaps in knowledge, and suggest topics to be further investigated. In particular, the survey underlined competition as being the main mechanism of ecological impact on plant communities and Natura 2000 habitats. Of the 241 species, only Ailanthus altissima was found to exert an ecological impact on plant communities and Natura 2000 habitats in all Italian regions; while a further 20 species impact up to ten out of the 20 Italian administrative regions. Our data indicate that 84 out of 132 Natura 2000 Habitats (64%) are subjected to some degree of impact by invasive alien plants. Freshwater habitats and natural and semi-natural grassland formations were impacted by the highest number of alien species, followed by coastal sand dunes and inland dunes, and forests. Although not exhaustive, this research is the first example of nationwide evaluation of the ecological impacts of invasive alien plants on plant communities and Natura 2000 Habitats.
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