1,721,198 research outputs found
Garrigue plant communities of ultramafic outcrops of Tuscany (central Italy)
No full textGarrigue plant communities of the ultramafic outcrops in Tuscany are here analyzed from a phytosociological point of view on the basis of original and published data. All the investigated vegetation types belong to the association Armerio-Alyssetum bertolonii, already described from Monte Ferrato. Two subassociations, typicum and Euphorbietosum spinosae subass. nova, are recognized, their distribution evidenced and their structural and chorological differences pointed out. The syntaxonomical problems of the Tuscan ultramafic communities are discussed. -Author
The coast and island habitats of Tuscany: Present situation, vulnerability and perspectives [Gli habitat costieri ed insulari della Toscana: Conoscenze attuali, prospettive e vulnerabilità]
No full textA synthetic data set drawn from a Tuscan regional project (Repertorio Naturalistico Toscano) intended to individuate sites with habitats of European and regional importance in its territory, focused on coast and island habitat of conservation interest is reported and discussed. A synthetic method to assess habitat evaluation in terms of quality and vulnerability is illustrated. Finally, some scientific-vegetation investigations and management actions of active conservation resulted from basic knowledge studies are briefly presented. © Società italiana di Scienza della Vegetazione
Lectotypification and combination of Festuca apennina (Poaceae)
No full textThe name Festuca apennina is discussed and lectotypified using a specimen held at FI. A new combination, Lolium apenninum, is proposed
Le collezioni lichenologiche dell'Herbarium Universitatis Florentinae (FI) e dell' Erbario Tropicale di Firenze (FT). Not. Soc. Lich. Ital
No full textVerso un Archivio Nazionale degli interventi di reintroduzione delle piante minacciate della flora spontanea italiana: prima realizzazione di un sito web
No full textPriority invasive alien plants in the Tuscan Archipelago (Italy): comparing the EPPO prioritization scheme with the Australian WRA
No full textFor the first time, we tested the European and Mediterranean Plant Protection Organization (EPPO) prioritization process (EPP) on 212 alien plant species thriving in the Tuscan Archipelago, Central Italy. We compared the results of the EPPO procedure with those of the Australian Weed Risk Assessment (A-WRA) system. The two methods were also tested against the categorization performed at the national and local level by a panel of experts. Our results suggest that both methods accurately predict the invasiveness of species already present in the Tuscan Archipelago. However, the total numbers of species included in the highest risk categories by the two methods differed greatly, with the EPPO prioritization process including fewer species in the highest
risk class. The two methods differed in the ability to correctly detect the invasive species, with the A-WRA method being more conservative, but at cost of more species in the highest risk class. Using Generalized Linear Models, we showed that both methods suffer from some degree of dependence from one or more of the tested explanatory variables (life span, year of first record). The results suggest that the choice of a risk assessment method should be driven by the main aim of the assessment, i.e., distinguishing between a more predictive tool (A-WRA) and a prioritization tool (EPP) for already introduced species
Contribution to the syntaxonomical knowledge of the Tilio-Acerion woodlands in the North-central Apennine (central Italy) [Contributo alla conoscenza sintassonomica dei boschi del Tilio-Acerion Klika 1955 dell’Appennino centro-settentrionale (Italia centrale)]
No full textA phytosociological study of the Tilio-Acerion woodlands in the northern part of the central Apennine chain is presented. 71 unpublished relevés were analysed using the Twinspan software. Four groups are recognised: the first one is referred to the Ornithogalo sphaerocarpi-Aceretum pseudoplatani association in its typical form; the second is characterized by species linked with deep soils with a good presence of clay and has been referred to the new subassociation Ornithogalo sphaerocarpi-Aceretum pseudoplatani geranietosum nodosi; the third group is referred to the new association Glechomo hirsutae-Aceretum obtusati characterized by species linked with nitrophilous and saxicolous conditions of the microhabitat; the ultimate group is formed by little phytocoenose isolated in a matrix formed by exstensive pastured areas and a syntaxonomic treatments is not proposed. © 2014 Fitosociologia. All rights reserved
Il tumulo eneolitico di Via Bruschi a Sesto Fiorentino
No full textIl tumulo di via Bruschi a Sesto Fiorentino rappresenta la prima evidenza funeraria in ambito locale, a fronte dei numerosi contesti insediativi. La struttura è chiaramente connessa alla diffusione dei gruppi del campaniforme in Italia centrale. L'A. propone una serie di confronti strutturali utili a mettere in luce le analogie con alcune aree europee, al fine di sottolineare le relazioni interregionali durante il III millennio a.C. tra Italia centrale e ambienti transalpini. Tali connessioni sono coerenti con quanto è evidenziato dalle analisi delle produzioni fittili
The rock-face vegetation in the northern apennines and neighbouring mountain areas, from the coast line to the highest summits
No full textAims: The study aims at putting together and comparing different types of rock vegetation classified to different syntaxa and usually studied separately. The particular objectives of the study were: 1) to identify and classify the vegetation units of rock communities; 2) to explain floristic differences between phytosociological units with different habitat conditions. Study area: The study area lies at the northern border of the Italian Peninsula, between 43 degrees 40' and 44 degrees 40' N and between 9 degrees and 11 degrees E. It is characterized by a great variety of rocky habitats and represents a centre of endemism and a zone of phytogeographic transition between the Alps and the Apennines. Methods: The study was based on a dataset including 693 phytosociological releves that were classified according to the recent updatings of the Braun-Blanquet method. During the classification, releves were assigned to phytosociological classes based on the cover-abundance prevalence of diagnostic species, taking into account the current literature. The definitive classification into associations was carried out through cluster analysis. The analysis of floristic variation within the rock vegetation was performed through Principal Component Analysis, adopting Ellenberg indicator values as indirect environmental factors. Results: We identified 36 basic vegetation units (35 of them evaluated as associations) belonging to four phytosociological classes (Crithmo-Staticetea, Adiantetea, Asplenietea trichomanis and Polypodietea). All these vegetation units were characterized by their floristic composition, structure, syntaxonomy, habitat and distribution. Conclusions: More than half of the identified associations and a new suballiance Primulenion apenninae (within the alliance Androsacion vandellii) were newly described. Two alliances (Moehringion muscosae and Hymenopbyllion tunbrigensis) were first documented as part of the Italian vegetation. Indirect gradient analysis indicated that, within the four classes, the floristic composition varied along different environmental gradients and that temperature can be identified as the factor most strongly correlated with the variation of rock-face vegetation
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