Caratterizzazione fitosociologica dell’habitat prioritario 6220*-“Percorsi substeppici di graminacee e piante annue dei Thero-Brachypodietea”: caso di studio della Sardegna settentrionale

In this paper we aimed at characterizing phytosociologically the priority habitat 62201: in Northern Sardinia. In the study area this habitat is identified oil the field by the presence of 18 plant associations, referred to the following syntaxonomic classes: Helianthemetea guttati. Poetea bulbosae, Artemisietea vulgaris and Lygeo-Stipetea. Within the Brachypodio ramosi-Dactyletalia hispanicae order of the Artemisietea vulgaris class, three new associations Lire here described for the first time: Ohrydo praecocis-Dactyletum hispanicae, Orchido lotigicorni-Dactyletum hispanicae and Orchido collinae-Ductyletum hispanicae which are all referred to the Leontodo tuberosi-Bellidion sylvestris alliance. The wide structural and functional heterogeneity. that prevent from outlineing, common management strategies to all the 4 vegetation Classes included in the habitat. suggests the need of a clarification of the Habitats Directive and its revision oil the basis of the recent phytosociologic findings