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Fitosociologia numero 44 (2) S1

pag. 271-278: Caratterizzazione fitosociologica dell’habitat prioritario 6220*-“Percorsi substeppici di graminacee e piante annue dei Thero-Brachypodietea”: caso di studio della Sardegna settentrionale

E. Farris, Z. Secchi & R. Filigheddu

Dipartimento di Botanica ed Ecologia vegetale, Università di Sassari, Via Muroni 25 – 07100 Sassari, Italia; e-mail: emfa@uniss.it; filighed@uniss.it

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abstract

Phytosociological characterization of the priority habitat 6220*-Pseudo-steppe with grasses and annuals of the Thero-Brachypodietea: case study from Northern Sardinia. In this paper we aimed at characterizing phytosociologically the priority habitat 6220* in Northern Sardinia. In the study area this habitat is identified on 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 are here described for the first time: Ophrydo praecocis-Dactyletum hispanicae, Orchido longicorni-Dactyletum hispanicae and Orchido collinae-Dactyletum 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 on the basis of the recent phytosociologic findings.

keywords

biodiversity, Habitats Directive, herb communities, Northern Sardinia, phytosociology.