Rossella Filigheddu

A phylogenetic analysis was performed based on ITS DNA sequences of fourteen samples from different sources of six species of Salicornia, the three allied genera Arthrocnemum, Sarcocornia and Halocnemum of the same tribe Salicornieae, and other genera of the subfamily Salicornioideae used in previous studies. Bassia hirsuta, Camphorosma monspeliaca (subfamily Chenopodioideae) and four species of Suaeda (subf. Suaedoideae) were chosen as outgroups. Results show that the annual genus Salicornia is a sister group to the perennial genera Sarcocornia, Arthrocnemum and Halocnemum. Moreover, the phylogenetic analysis based on ITS results distinguished two groups of Salicornia species which fitted with ploidy level: one group consisted of diploid species, and the second of tetraploid ones. Sarcocornia and Arthrocnemum are shown to be closely related, even though the species investigated here exhibited an evident distance between their ITS sequences. On the basis of our results, these two genera should be united. Bienertia (already separated as Bienertieae) was confirmed as probable outgroup to the subf. Salicornioideae, while Kalidium (subf. Salicornioideae, tribe Halopeplideae) was an outgroup to the rest of the Salicornioideae (tribe Salicornieae). The group Allenrolfea plus Halocnemum was the most basal of the tribe Salicornieae amongst those investigated in this study. The two samples of Halocnemum strobilaceum used in this work displayed numerous changes (transitions and transversions) in their respective sequences, probably related to their morphological and chorological differentiation. On the basis of our analysis, the most probable basal chromosome number for Salicornieae appears to be 2n = 18. The same number would also be the base number for the annual genus Salicornia and the perennial Arthrocnemum ( + Sarcocornia), with polyploidy arising independently in the two groups.

From a biological and biogeographic point of view, Mediterranean temporary wet habitats are recognised to be amongst the most interesting habitats in the Mediterranean bioclimatic region. They are considered to be habitats of Community Interest and are included in the “standing water group”. Due to an overlap in the plant species and syntaxa indicated as characteristic, the assignment of the plant communities to the habitats 3120, 3130 and 3170* is far from straightforward.

La Società Sarda di Scienze Naturali ha lo scopo d'incoraggiare e stimolare l'interesse per gli studi naturalistici, promuovere e sostenere tutte le iniziative atte alla conservazione dell'ambiente e costituire infine un Museo Naturalistico Sardo. ... Presidente: Franca Valsecchi. Segretario: Bruno Corrias. Consiglieri: Giovanni Cordella, Franca Dalmasso, Paolo Roberto Federici, Maria Pala. Revisori dei Conti: Aurelia Castiglia, Enrico Pugliatti, Giovanni M. Testa. Collegio Probiviri: Tullio Dolcher, Giovanni Manunta, Vico Mossa.

Il Bacino del Mediterraneo è uno degli hotspots di biodiversità a livello globale (Myers et al., 2000), infatti risulta terzo al mondo per l'abbondante presenza di piante endemiche (circa 13.000 specie esclusive che corrispondono al 4, 3% di tutte le piante del mondo).

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.

Abstract The role of abiotic factors (geology and climate) and human activities in shaping the spatial variability and distribution patterns of plant populations are widely studied. Less is known on the effects of plant-plant and plant-animal interactions in determining the dispersal, establishment and performance of plant species propagules and therefore in conditioning plant population spatial variability.

A syntaxonomic revision of the holm-oak and cork-oak woods of Sardinia is here presented. The geological and phytoclimatic heterogeneity of the island and the wide ecological amplitude of the holm-oak, result in a large phytocoenotic diversity of the Sardinian holm-oak woods. These are referred to five associations: Pyro amygdaliformis-Quercetum ilicis, Prasio majoris-Quercetum ilicis ass. nova, Galio scabri-Quercetum ilicis, Saniculo europaeae-Quercetum ilicis ass. nova and Aceri monspessulani-Quercetum ilicis.

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 Halimionio portulacoidis-Limoniastretum monopetali ass. nova and Ephedro fragilis-Pistacietum lentisci ass. nova.

This paper presents a phytosociological study of the halophyle, chamaephytic and hemicryptophytic communities prevalently consisting of Limonium sp. pl., which are localised behind the dunes of Sardinian coastal sites on sandmuddy substratum in humid and flat areas, between the drier communities and the more hygrophilous ones.

In this work we talk about coastal and littoral terrestrial habitats and plant communities in Northern Sardinia. We check the right attribution of different plant communities to their habitat type, among those indicated in the Annexe I of the 43/92/EEC Habitat Directive, and the coherence between the Natura 2000 Network and the tested habitat presence in the study area.

Uno studio della vegetazione condotto con metodo fitosociologico (Gehù & Rivas-Martinez, 1981) porta all'identificazione delle associazioni vegetali presenti in un territorio. Le piante infatti con la loro presenza indicano la condizione ecologica dell'ambiente in cui vivono attraverso le loro caratterizzazioni floristiche, strutturali ed ecologiche.

The trachybasalt biogeographic sub-district of the NW Sardinian district, included in the coastal and hilly sub-sector of the Sardinian biogeographic sector, is characterised by two large effusive complexes: that of the rhyolites, andesites and dikes of the Oligo-Miocene alkaline volcanic cycle (14-32 Ma) and alkaline basalts, rhyolites, rhyodacites and dikes of the volcanic cycle with alkaline, transitional and sub-alkaline affinity of the Pliocene-Pleistocene (0.14-5.3 Ma).

Abstract This paper deals with the anatomical and histological study of a silicified specimen of a palm consisting of a part of the trunk surrounded by roots. The sample comes from the Lower Miocene of North West Sardinia. The comparison with fossil species and exsting species leads to the conclusion that the specimen belongs to a new fossil species closely related to Chamaerops humilis L., widespread throughout the Mediterranean area.

Contribution to the knowledge of the Sardinian Laurus nobilis L. stands, a priority habitat of the 92/43/EEC Directive. The results of the phytosociological study of the Sardinian Laurus nobilis L. stands are here presented. The statistical analysis of the surveys, carried out on the best known populations, allowed us to recognize four new plant communities, referred to one association and three subassociations. In Sardinia the Laurus nobilis L.

B. ANZALONE, Roma (I) PV AruuGONI, Firenze (I) G. AYMONIN, Paris (F) C. BALLETI'o, Genova (I) P. BAMPs, Meise (B) A. BOZZINI, Roma (I) A. CERUTI, Torino (I) F. CINELU, Pisa (I) C. CORTINI PEDROTTI, Camerino (I) A. DE PHILlPPIS, Firenze (I) F. EHRENDORFER, Wien (A) M. FOlllERI, Roma (I) F. GARBARI, Pisa (I) C. GOMEZ-CAMPO, Madrid (E) J. GRAU, Miinchen (D) W. GREUTER, Berlin (D) R. GROLLE, Jena (D) JB HARBORNE, Reading (GB) CC HEYN, Jerusalem (lL) VH HEYWOOD, Kew (GB) C.

The aims of this research were to contribute to the knowledge of the Mediterranean temporary wet habitats vegetation and to investigate the spatial distribution and the temporal successions of plant communities under different hydrological regimes in North Western Sardinia.

We present here the results from a phytosociological and synchorological study of the deciduous oak woods of Sardinia. This vegetation analysis has allowed the individuation of three new associations: Lonicero implexae-Quercetum virgilianae, Ornithogalo pyrenaici-Quercetum ichnusae and Glechomo sardoae-Quercetum congestae.

This study describes the vegetation of S'Ena Arrubia lagoon, in the Gulf of Oristano, in the centre-western coast of Sardinia. This lagoon is classified as: Special Protection Zone (SPZ) according to EEC Directive 79/409, community importance site according to EEC Directive 92/43, IBA (Important Birds Area) site and fixed oasis of fauna protection and natural reserve. Throughout the years it was subject to several alterations.

The trachyte-basalt biogeographic sub-district of the north-western Sardinian district, included in the coastal and hill sub-sector of the Sardinian sector, is characterised by two large effusive complexes: Rhyolites, Andesites and Dikes of the Oligo-Miocenic limestone/alkaline cycle (14-32 Myrs), and alkaline Basalts, Rhyolites, Rhyodacites and Dikes of the volcanic cycle with alkaline, transitional and sub-alkaline affinity of Pliocene-Pleistocene (0.14-5.3 Myrs).

The results on the phytosociologic analysis on some shrub caducous meso-higrophylous communities are here presented. The study involves the north-western part of Sardinia (Italy), with major attention to the carbonatic and volcanic sectors of'Sassarese'and'Nurra'. The new associations Vinco sardoe-Rubetum ulmifolii, Crataego monaginae-Pyretum amigdaliformis and Rhamno alatermi-Spartietum juncei are here described.

Categoria di rischio: Critically Endangered, CR B1ab (ii, iii, v)+ 2ab (v). Criterio DA causa della massima minaccia possibile, rappresentata attualmente dalla pressione turistica, in costante aumento negli ultimi anni, la specie, presente in un'unica location e con AOO< 20 Km2, potrebbe ricadere, nell'arco di un breve periodo di tempo, in una delle categorie di minaccia superiori. Categoria di rischio: essendo soddisfatte le opzioni del sottocriterio D2, la specie ricade nella categoria Vulnerable, VU D2.

Criterio B-EOO inferiore a 5000 Km2 e AOO inferiore a 500 Km2, inoltre la sua popolazione si ritrova in quattro locations; per la specie è stato osservato, e si prevede per il futuro, una riduzione dell'estensione dell'habitat per edificazione ad uso turistico e cambiamenti d'uso nel territorio. Categoria di rischio: Endangered, EN B1+ 2ab (iii).

The vegetation map of S'Ena Arrubia Lagoon in centre-western Sardinia (1: 2,500 scale) is presented and some diachronic remarks are made by referring to historical data available. The main object of this cartography, after a research on the biotope vegetation, is to allow the biomonitoring of an extremely important site for the biodiversity conservation (Protected Area: SIC, ZPS, IBA), which is to use for an ecologically aware management.

This paper deals about some nitrophilous associations of northem Sardinia. These associations are included in the classes: Pegano-Salsoletea Br.-Bl. e O. de Bolòs 1957, Stellarietea mediae R. Tx., Lohm et Preising in R. Tx. 1950 and Artemisietea vulgaris Lobm, Prsg. et Tx. in Tx. 1950. The new associations Camphorosmo monspeliaceae-Halimionetum portulacoidis, Sileno albae-Acanthetum mollis, Smyrnietum rotundifolii, Bryonio marmoratae-Aretum pieti e Dauco maximi-Magydaridetum pastinaceae are here proposed.

On the Olea europaea L. var. sylvestris Brot. woodlands in Sardinia. The phytosociological analysis of Olea europaea. var. sylvestris woodlands occurring in Sardinia are here presented. The following sintaxa are described for the first time: Cyclamino repandi-Oleetum sylvestris and Myrto communis-Oleetum sylvestris are referred to the Quercion ilicis alliance while Asparago acutifolii-Oleetum sylvestris and Asparago albi-Oleetum sylvestris are referred to the Oleo-Ceratonion alliance.

Abstract Background and Aims The Mediterranean region is of prime importance to biodiversity at a global level, mainly due to the abundance of endemic plant species. However, information about these species is still scarce, especially at the genetic level. In this paper the first assessment is reported of the genetic structure of Centaurea horrida (Asteraceae), an endemic, sea-cliff-dwelling plant from Sardinia.

Tenore (1826) originally described Artemisia variabilis from the surroundings of Naples. Later on, Gussone (1843) gave this taxon also for Sicily. It was considered as a species in all the italian Floras of the last Century (Bertoloni, 1853; Arcangeli, 1882 e 1894; Cesati & al., 1884). In the first half of the twentieth century, the name Artemisia variabilis had less fortune: Fiori (1903 and 1927) considered Artemisia variabilis just a variety of A. campestris L. More recently, Zangheri (1976) gave it as a possible synonym of A. campestris subsp.