A phytosociological study of the deciduous oak woods of Sardinia (Italy)

摘要: We present here the results from a phytosociological and synchorological study of deciduous oak woods Sardinia. This veg etation analysis has allowed individuation three new associations: Lonicero implexae-Quercetum virgilianae, Ornithogalo pyrenaici-Quercetum ichnusae Glechomo sardoae-Quercetum congestae. The virgilianae association includes on calcareous substrata spread throughout Northern Sardinia, which can occasionally be found in southern areas; first these are rich mesophil ous species attributed to subassociation cyclaminetosum repandi, while others referred quercetosum virgilianae. association, more widely distributed Central-Northern climatophilous that lithological non-carbonatic nature, particular, andesites, trachytes metarenites. typical aspect is referre d cytisetosum villosi, ilicetosum aquifolii mesophilous basaltic substrata. sardoaeQuercetum congestae always higher altitude areas with an oceanic pluviseasonal temperate bioclimate. Of this, congestae, granite areas, oenanthetosum pimpinelloidis, those metamorphic basalt, proposed. At hierarchical levels, endemic Sardinian-Corsican suballiance Clematido cirrhosae-Quercenion ilicis, alliance Fraxino orni-Quercion for other associations Paeonio morisii-Quercenion , (holotypus: Glechoma ass. nova) particular Sardinian biogeographic subprovince, proposed, Pino calabricae-Quercion order Quercetalia pubescentipetraeae, class Querco roboris-Fagetea sylvaticae .