Fitosociologia 46 (1) 2009

J.-M. Géhu

16 rue de L’Eglise, F-80860 Nouvion en Ponthieu, France

Phytosociological significance of the Brassica oleracea ssp. oleracea on the European Atlantic cliffs. The article in the first part describes two cliff’s associations of Brassica oleracea on the Channel shores: Sileno maritimae-Brassicetum oleraceae on the Dorset coast (England) and Picrido hieracioïdis-Brassicetum oleraceae on the Picardy-Normandy cliffs (France). The second part of the article analyzes the literature data that show that on the European Atlantic coasts Brassica oleracea sub. oleracea is a plant much more linked as Asplenium marinun at Crithmo-Armerietalia Géhu 1964 then to Parietarietalia Rivas-Martinez in Rivas-Goday 1964. There are many transgressive species on the calcareous grasslands of Brometalia erectis that differentiate a new sub-alliance, the “Festuco pruinosae-Brassicenion oleraceae“ within the aeroaline alliance of Crithmo-Armerion maritimae Géhu 1968.

S. Bagella, M. C. Caria, E. Farris, R. Filigheddu

Dipartimento di Botanica ed Ecologia Vegetale, Via Muroni 25, 07100 Sassari; e mail: s.bagella@uniss.it

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. The vegetation was sampled in temporary wet habitats located in large depressions (temporary ponds), in small depressions in patchwork with the vegetation dominated by Myrtus communis (waterlogged soils) and in rocky outcrops (rock pools). Three belts were recognized in temporary ponds: a central belt, an intermediate belt, and an outer belt. Overall 11 associations and subassociations were identified, within 4 syntaxonomic classes: Potametea, Isoeto-Nanojuncetea, Isoeto-Littorelletea and Phragmito-Magnocaricetea. Four new associations have been described: Isoeto tigulianae-Callitrichetum brutiae, Romuleo requienii-Isoetetum histricis, Apio crassipedis-Elatinetum macropodae, and Lythro hyssopifoliae-Crassuletum vaillantii. Moreover, within the Preslion cervinae alliance of the Isoeto-Nanojuncetea class, a new Tyrrhenian suballiance Apienion crassipedis, has been established, for which the typical association is the Apio crassipedis-Isoetetum tigulianae Biondi & Bagella 2005 corr. hoc loco. Aquatic vegetation was found in the central and intermediate belt of the temporary ponds and within the rock pools. Late winter–spring amphibious communities were present in almost all temporary wet habitats. Summer plant communities were found exclusively in the central belt of temporary ponds

F. Taffetani, S. Orlandini & S. Zitti

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

Vegetational landscape of a Pre-Appenine area located in central Italy: the “Bosco dei Monaci Bianchi” in the Marche (Italy). We here present a phytosociological and geo-sinphytosociological study of the plant biodiversity of the “ Bosco dei Monaci Bianchi”, a little wood in the hilly area of the Marche Region. This biotope is particularly interesting, because is one of the few natural islands present in a district characterized by a strong human pressure. Some associations of Querco-Fagetea and Quercetea ilicis are found: Fraxino excelsioris-Aceretum obtusati, with the new sub-association ruscetosum hypoglossi, Aro italici-Alnetum glutinosae, Ornithogalo sphaerocarpi-Aceretum pseudoplatani, Lonicero xylostei-Quercetum cerridis, Roso sempervirentis-Quercetum pubescentis e Cyclamino hederifolii-Quercetum ilicis. This study has, also, allowed the recognition of the other plant communities that are in chain or dynamic contact with the woodland associations

C. Andreis¹, S. Armiraglio², M. Caccianiga¹, B. Cerabolini³

¹Dipartimento di Biologia, Sezione di Botanica Sistematica, Università degli Studi di Milano carlo.andreis@unimi.it
²Museo Civico di Scienze Naturali, Brescia
³Dipartimento di Biologia Strutturale e Funzionale, Università degli Studi dell’Insubria, Varese

C. Andreis¹, S. Armiraglio², M. Caccianiga¹, B. Cerabolini³

¹Dipartimento di Biologia, Sezione di Botanica Sistematica, Università degli Studi di Milano carlo.andreis@unimi.it
²Museo Civico di Scienze Naturali, Brescia
³Dipartimento di Biologia Strutturale e Funzionale, Università degli Studi dell’Insubria, Varese

In Lombardy, boreal-like conifer forests are widespread on the whole alpine chain, particularly in the central Raethian Alps with continental climate and, on a lesser extent, in the Lepontine Alps with oceanic climate and in the peripheral chains with intermediate climatic traits (Orobian Alps, Camonica Valley, Pre-Alps). The average yearly rainfall can exceed 2000 mm in the Lepontine Alps, while it falls below 1000 mm in the inner Rhaetian Alps. The bedrock consists mainly in siliceous rocks.
In the present work, the main forest communities have been outlined on the basis of 253 relevés, analysed by multivariate analyses and by the comparison with the main syntaxonomic schemes found in literature. The described communities can be related to the main biogeographical and ecological domains of Lombardy. Communities belonging to Piceetalia excelsae Pawl. in Pawl. et al. 1928 can be observed on acidic, oligotrophic soils. The alliance Piceion excelsae Pawl. in Pawl. et al. 1928 is divided into two suballiances: the first (Vaccinio-Piceenion Oberd. 1957) includes the subalpine forests of the continental inner Alps; the second (Vaccinio-Abietenion Oberd. 1962) the upper montane and subalpine forests belonging to the oceanic domains (e.g. Lepontine and Orobian Alps)

C. Andreis¹, S. Armiraglio², M. Caccianiga¹, B. Cerabolini³

¹Dipartimento di Biologia, Sezione di Botanica Sistematica, Università degli Studi di Milano carlo.andreis@unimi.it
²Museo Civico di Scienze Naturali, Brescia
³Dipartimento di Biologia Strutturale e Funzionale, Università degli Studi dell’Insubria, Varese

M. Lonati

Dipartimento di Agronomia, Selvicoltura e Gestione del Territorio, Università di Torino, via Leonardo da Vinci 44, 10095 Grugliasco (TO); e-mail: michele.lonati@unito.it

On the presence of the Nardo-Juncion squarrosi (Oberdorfer 1957) Passarge 1964 alliance in the Southern slope of the Alps (Piedmont, Italy). Results of a phytosociological study in a Juncus squarrosus and Nardus stricta dominant community in Piedmont (NW Italy) are herein presented. The vegetation study has been performed throught 7 phytosociological relevés. The Nardo-Juncion squarrosiNardo-Juncion squarrosi alliance during the Quaternary glaciation phases. Some guidelines for grazing management are also reported with the purpose of conserving the coenosis.