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Indagine fitosociologica sulle praterie a Brachypodium Retusum (Pers.) beauv. della Sardegna

Bacchetta, Gianluigi - Guarino, Riccardo - Brullo, Salvatore - Giusso Del Galdo, Gianpietro (2005) Indagine fitosociologica sulle praterie a Brachypodium Retusum (Pers.) beauv. della Sardegna. Parlatorea, 7 . pp. 27-38. ISSN 1591-2744

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Abstract

The grasslands characterized by the dominance of Brachypodium retusum occurring in Sardinia are examined. These communities, belonging to the Thero-Brachypodion ramosi alliance (Lygeo-Stipetea class), are quite widespread in the Island, where they usually grow on carbonate substrata from the sea level up to 1300 m of altitude. On the basis of several phytosociological relevés, it has been possible to recognize six associations well-differentiated from the floristic, ecological and syndynamic point of view. The autonomy of these associations is also supported by a numerical multivariate analysis based on quantitative data (dendrogram and P.C.A.). The associations surveyed are the following: Dorycnio suffruticosi-Stipetum offneri ass. nova, localized on summit plateaux at an altitude of 700-1200 m (CE Sardinia), Stipo bromoidis-Astragaletum verrucosi ass. nova, very rare and circumscribed to the coastal hills (W Sardinia), Triseto splendentis-Brachypodietum retusi ass. nova, colonizing more or less stabilized screes at 200-900 m of altitude (NE Sardinia), Asphodelo africani-Brachypodietum ramosi Biondi & Mossa 1992 corr., thermo-xerophilous community linked to coastal stands (S Sardinia), Ranunculo graminei-Brachypodietum retusi ass. nova, orophilous community growing on jointed rocky places at an altitude of 1100-1300 m (CE Sardinia), Melico ciliatae-Brachypodietum retusi ass. nova, found on the coastal screes of Figarolo islet (NE Sardinia). Besides, a floristic comparison among the hitherto known associations belonging to this alliance is given.

Item Type:Article
Publisher:Università degli Studi di Firenze
Date:2005
Institution:Universita' degli Studi di Cagliari
Divisions:Dipartimenti (fino a dicembre 2011) > Dipartimento di Scienze botaniche
Subjects:Area 05 - Scienze biologiche > BIO/03 Botanica ambientale e applicata
Uncontrolled Keywords:Phytosociology, grasslands, Brachypodium retusum, Sardinia, praterie, Sardegna, rilievi, indagine fitosociologica
ID Code:777
Deposited On:07 May 2012 13:57

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