1,721,053 research outputs found
La nascita del progetto pilota nazionale Vespasiano e la scuola: la Summer school e i portali web del MIBAC e del MIUR
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La nascita del progetto pilota nazionale Vespasiano e la scuola: la Summer school e i portali web del MIBAC e del MIUR
No full textIl mostro e il sacro. Coordinate mitiche e rituali della difformità fra emarginazione e integrazione
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A geobotanical survey on acidophilous grasslands in the Abruzzo, Lazio and Molise National Park (Central Italy)
Full text linkThe acidophilous grasslands of the south-eastern part of the Abruzzo, Lazio and Molise National Park was studied by the phytosociological method and analyzed from a synecological viewpoint with the help of soil analysis. Four clusters of relevés resulted from the numerical classification. Syntaxonomically they were ascribed to the following associations: Poo violaceae-Nardetum strictae, Potentillo rigoanae-Festucetum paniculatae, Nardo strictae-Brachypodietum genuensis and Potentillo rigoanae-Brachypodietum genuensis. Since the original proposal of all the syntaxa identified in the present study were affected by nomenclatural mistakes, they were corrected in accordance with the rules of ICPN. The occurrence of Anthoxanto-Brachypodietum in central Apennines, is excluded since this association falls in syntaxonomical synonymy with Potentillo-Brachypodietum. The synecological analysis proved that the distribution of the different communities identified within the study area to be correlated with topographic, geomorphological and soil factors. Among these latter, the ratio H+/basic cations, pH behave as the most influencing parameters in the distribution of the communities identified
'Vespasianoelascuola.com'. Sezione didattica multimediale del Progetto-pilota nazionale 'Vespasiano e la scuola'
No full textSyntaxonomy, chorology and dynamics of Carpinus orientalis communities in Central Italy
No full textThis paper deals with the synecological and syndynamic aspects of the Carpinus orientalis communities of the Ausoni mountains. The Ausoni are a large limestone massif of southern Lazio (Tyrrhenian district of Central Italy), the bioclimatic features of which are well suited to the ecological requirements of Carpinus orientalis. The new association Lonicero etruscae-Carpinetum orientalis is introduced here. A thermophilous aspect of this association (Lonicero-Carpinetum orientalis phillyreetosum latifoliae) is also identified. From a syndynamic standpoint Carpinus orientalis woodlands are secondary communities following the destruction of the primary Quercus pubescens communities (Roso sempervirentis-Quercetum pubescentis). These are also compared with the other types of Carpinus orientalis communities in the Italian peninsula and the Adriatic side of the Balkan peninsula
A review of the application of the name Quercus dalechampii
No full textEuropean taxonomists are divided regarding Quercus dalechampii, considering it either: (1) a distinct species close to Q. petraea, (2) a distinct species close to Q. pubescens, or (3) falling within the morphological variability of previously described species, including Q. petraea and Q. pubescens. These taxonomic disagreements are largely due to inconsistencies between the description of Q. dalechampii and much of its original material. In order to resolve these differing interpretations, all available original material was examined and a lectotype, superseding a previous neotype, was chosen from this material. The original material for the name consisted of mixed material belonging both to the Q. petraea complex and the Q. pubescens complex. The lectotype designated here is characterized by pubescent leaves and belongs to the Q. pubescens complex.European taxonomists are divided regarding Quercus dalechampii, considering it either: (1) a distinct species close to Q. petraea, (2) a distinct species close to Q. pubescens, or (3) falling within the morphological variability of previously described species, including Q. petraea and Q. pubescens. These taxonomic disagreements are largely due to inconsistencies between the description of Q. dalechampii and much of its original material. In order to resolve these differing interpretations, all available original material was examined and a lectotype, superseding a previous neotype, was chosen from this material. The original material for the name consisted of mixed material belonging both to the Q. petraea complex and the Q. pubescens complex. The lectotype designated here is characterized by pubescent leaves and belongs to the Q. pubescens complex
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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