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Fitosociologia numero 41 (1) S1

pag. 125-141: Halophilous vegetation of Olbia pond system (NE-Sardinia)

E. Biondi1, E. Brugiapaglia2, E. Farris3, R. Filigheddu3 & Z. Secchi3

1Università Politecnica delle Marche, Dipartimento di Scienze Ambientali e delle Produzioni Vegetali, via Brecce Bianche, 1 - 60131 Ancona; e-mail: e.biondi@univpm.it

2Servizio Aree Naturali Protette, Regione Marche, via Tiziano 44, I-60100 Ancona; e-mail: elisabetta.brugiapaglia@regione.marche.it

3Università degli Studi di Sassari, Dipartimento di Botanica ed Ecologia vegetale, via Muroni 25, I -07100 Sassari; email: emfa@uniss.it; filighed@uniss.it; zesec@uniss.it

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abstract

Authors report some results about a phytosociological study concerning the wetlands to the south of Olbia (Gallura, north-eastern Sardinia).
Vegetation analysis allowed to detect 21 associations, among them two are new and denominated Halimiono portulacoidis-Limoniastretum monopetali ass. nova and Ephedro fragilis-Pistacietum lentisci ass. nova. Among them, the association Halimiono portulacoidis-Limoniastretum monopetali shows a particular phytogeographical interest, because it sets the Limoniastrum monopetalum vegetation in the only Sardinian station of this shrubby Plumbaginacea.
From a syntaxonomic point of view, described syntaxa are included in 9 vegetation classes.
Plant landscape of the area was reconstructed by the study of chain contacts among different communities, placed in space according to humidity and salinity gradients, determined by substratum texture and micromorphology. On the basis of phytocoenotic diversity stressed by this research, this study area is believed to be deserving of protection aiming at conserving and managing its populations and plant communities.

keywords

biodiversity, Ephedro fragilis-Pistacietum lentisci ass. nova, Halimiono portulacoidis-Limoniastretum monopetali ass. nova, halophilous vegetation, phytosociology, Sardinia, syntaxonomy