Fitosociologia 44 (2) 2007

M. Zupancic

Slovene academy of sciences and arts, SI–1000 Ljubljana, Novi trg 3; e-mail: sazu@sazu.si 

The paper discusses the syntaxonomic problems of the classes Vaccinio-Piceetea and Erico-Pinetea in Slovenia, the easternalpine-dinarid and westbalkan regions. Some syntaxonomic units are corrected or renamed.

L. Poldini¹ & E. Bressan²

¹Università degli studi di Trieste, Dipartimento di Biologia, Via Giorgieri 10, I-34127 Trieste; e-mail: poldini@units.it

²Università degli studi di Trieste, Dipartimento di Biologia, Via Weiss 2, I-34127 Trieste; e-mail: ebressan@units.it

Norway Spruce and European Silver-fir woods in Friuli (NE-Italy). This paper deals with woods dominated by Norway Spruce and European Silver-fir localized in the SE-Alps sector of Friuli region. Phytosociological analyses have been carried out in order to contribute to the knowledge of this woods syntaxonomy. The vegetation study has been performed through 141 phytosociological relevés according to Braun-Blanquet phytosociological method. The matrix, relevés by species, has been analysed by multivariate conventional techniques of classification (cluster analysis) and not-conventional ones (neural network) in order to highlight homogeneous groups. The neural network techniques combined with the sociological-ecological groups method (GSE) allowed to recognize Homogyno sylvestris-Piceetum, Laburno-Piceetum, Rhodothamno-Piceetum e Anemono-Abietetum, on calcareous substrata, and Homogyno alpinae-Piceetum, Luzulo nemorosae-Piceetum, Cardamino pentaphylli-Abietetum e Senecioni cacaliastri-Piceetum, on sandstone. Petasito paradoxi-Piceetum e Rhodothamno-Laricetum units have not been included in syntaxonomical scheme, for the more uncertainties which persist in their sintaxonomic arrangement.

E. Farris, Z. Secchi & R. Filigheddu

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

Studio fitosociologico delle comunità arbustive e preforestali dei substrati effusivi della Sardegna nord-occidentale. Il subdistretto biogeografico trachi-basaltico del distretto sardo nord-occidentale, incluso nel sottosettore costiero e collinare del settore biogeografico sardo, è caratterizzato da due vasti complessi effusivi: quello delle rioliti e andesiti del ciclo calcalcalino Oligo-Miocenico (14-32 milioni di anni) e quello dei Basalti alcalini del ciclo Plio-Pleistocenico (0,14-5,3 milioni di anni). Tra il 2000 e il 2004, sono stati realizzati 156 rilievi fitosociologici sulle comunità arbustive e preforestali di quest’area, per migliorarne le conoscenze fitosociologiche. L’analisi della vegetazione ha permesso d’individuare 11 associazioni e 13 subassociazioni, riferite a 3 classi. Tra queste, 5 nuove associazioni sono qui descritte: Clematido vitalbae-Maletum pumilae, Crataego monogynae- Aceretum monspessulani, Lavatero olbiae-Rubetum ulmifolii, Genisto desoleanae-Ericetum arboreae e Telino monspessulanae-Cytisetum villosi.

G. Bacchetta¹, M. Casti¹ & L. Zavattero²

¹Centro Conservazione Biodiversità, Dipartimento di Scienze Botaniche, Università degli Studi di Cagliari, v.le S. Ignazio da Laconi, 13, I-09123 Cagliari; e-mail: bacchet@unica.it; maurocasti@libero.it

²Dipartimento S.T.A.T., Università degli Studi del Molise, Contrada Fonte Lappone, I-86090 Pesche (Is); e-mail: l.zavattero@tiscali.it

Vegetation analysis of the mining district of Montevecchio (SW-Sardinia). The results of a phytosociological research on the mining habitats of Montevecchio (SW-Sardinia) are presented. The statistic analysis of the relevés let to recognize 14 plant communities. The hygrophilous communities have been ascribed to the class Phragmito-Magnocaricetea, the hemicryptophytic mesohygrophilous ones to Juncetea maritimi, the therophytic to Tuberarietea guttatae and the hemicryptophytic mesoxerophilous to Lygeo-Stipetea.
The most interesting vegetation types turned out to be the chamaephytic and nanophanerophytic ones, both kinds are belonging to sardo-corsican endemic alliances: Ptilostemono casabonae-Euphorbion cupanii and Teucrion mari, respectively. The first alliance comprises pebble vegetation with distinctive ecological preferences, as they are able to colonize substrata polluted by heavy metal, with low pH values. Within this alliance, 4 new associations have been recognized: Scrophularietum bicoloris, Dactylo hispanicae-Helichrysetum tyrrhenici, Mercurialido corsicae-Euphorbietum cupanii and Dauco maritimi-Dittrichietum viscosae, the latter with two subassociations (typicum and rumicetosum glaucescentis). As to the Teucrion mari, 1 new association and 1 subassociation have been described (Helichryso tyrrhenici-Genistetum sulcitanae and Stachydi glutinosae-Genistetum corsicae euphorbietosum cupanii), found on aged mining dumps, where the long abandonment made possible the beginning of the pedogenetic processes.
The present study let to reconstruct the vegetation dynamics, that in the mining areas are clearly differing from the surrounding territory. It was possible to identify two special series, strictly related to these habitats and verging to the establishment of plant communities pertaining to the climatophilous series: the first is developing on coarse, hard-sloping debris, with very low water retention; the second is developing on fine-grained and coherent materials, found on flattened or gently-sloping sites, with high edaphic humidity. In wetlands, it was also possible to identify an edaphohygrophilous series and a geoseries of endoreic water bodies, not exclusive of the mining habitats.

M. Lonati¹ & S. Lonati²

¹Dipartimento di Agronomia, Selvicoltura e Gestione del Territorio, Università di Torino, via Leonardo da Vinci 44, 10095 Grugliasco (TO); e-mail: michele.lonati@unito.it

²via Garibaldi 18, 13017 Quarona (VC); e-mail: simonelonati@libero.it 

The xerophilous Festuca trachyphylla (Hackel) Krajina grasslands in the lower Valsesia (Piedmont, Italy). This work take into account the grasslands dominated by Festuca trachyphylla in Valsesia (Pennine Alps). The studied area is located in the northern district of Piedmont, under the influence of subatlantic climate. The vegetation study has been performed throught 13 phytosociological relevés. All data were submitted to multivariate statistical analysis. The vegetation was classified into the Poo bulbosae-Festucetum trachyphyllae ass. nova. The floristic composition includes a lot of ingressive species of Trifolio-Geranietea and Rhamno-Prunetea, in consequence of the location in the colline bioclimatic belt. Chorological, synecological and syndynamical datas were described in the paper, compared with the Jasiono-Festucetum valesiace described in the nearest Vallese (Switzerland).

Spampinato G., Crisafulli A. & Cameriere P.

Dipartimento S.T.A.F.A., Università “Mediterranea” di Reggio Calabria, Feo di Vito, I-89060 Reggio Calabria

Transformation of the coastal zones of the Region Calabria (S Italy) and consequences on the flora of the damp environments. The analysis of historical maps and ancient flora has allowed to emphasize the alteration that have interested the coastal damp areas in the last two century and the effects on the regional flora. Three different species contingent have been underlined: in rarefaction, disappeared, not observe in precedence; they have been connected to the changes suffered from the damp coastlines areas.