Search results for "syntaxonomy"
showing 10 items of 54 documents
Phytosociological survey of juniper wood vegetation in Tajikistan (Middle Asia)
2022
The paper presents the first syntaxonomic classification for juniper wood communities in Tajikistan with some remarks on their environmental gradients. A total of 119 relevés were sampled between 2015 and 2021 using the seven-degree Braun-Blanquet cover-abundance scale. They were classified by a modified TWINSPAN method. Diagnostic species were identified using phi coefficient as a fidelity measure. Detrended Correspondence Analysis (DCA) was used to determine relationships between samples, vegetation units and major gradients in species composition. Plant communities have been divided into two main groups. The first one is a west Irano-Turanian wood of Juniperus polycarpos var. seravschani…
Contribution to the phytosociological characterization of the forest vegetation of the Sicani Mountains (inland of north-western Sicily).
2016
The results of a phytosociological survey on the main forest vegetation aspects of the Sicani Mountains (inland of north-western Sicily), in turn included in the homonymous Regional Park recently established, are presented. This expansive territory (43,687 hectares), located between the Agrigento and Palermo provinces, is mainly composed by carbonate and silico-carbonate formations of the Sicani Units, whose highest peaks are represented by Mount Cammarata (1578 m a.s.l.), Mount delle Rose (1436 m), Pizzo Cangialoso (1420 m) and Mount Pernice (1393 m). Under the bioclimatic aspect, the area falls within the thermo- and supramediterranean belts, with ombrotype ranging from upper dry (annual …
Euphorbio meuselii-Rubetum ulmifolii, a new name for a Sicilian association of brambles
2018
Palabras clave: Nomenclatura, sintaxonomía, zarzales, Sicilia, Península Ibérica.Key words: Nomenclature, Syntaxonomy, brambles, Sicily, Iberian Peninsula.
Phytosociological and phytogeographical considerations on the orophilous alliance Berberido aetnensis-Crataegion laciniatae (Rhamno-Prunetea)
2011
The Olea europaea L. var. sylvestris (Mill.) Lehr. forests in the Mediterranean area
2019
This paper examines the forest communities dominated by Olea europaea L. var. sylvestris (Mill.) Lehr. that have been described up until now in the Mediterranean Region (including other isolated extrazonal areas in the northwestern Iberian Peninsula and in Northern Turkey) as more or less evolved aspects of woods, microwoods and high maquis that principally tend to make up climacic and edapho-climacic “series heads”. These forma- tions maintain a significant large-scale distributive potential within the infra- and thermomediterranean bioclimate belts (with a few penetrations into the mesomediterranean) with a dry-subhumid (and sometimes humid) ombrotype; however, they are currently quite ra…
Downy oak woods of Italy: phytogeographical remarks on a controversial taxonomic and ecological issue
2011
The importance of downy oak as an integral component of the "submediterranean" woods has been underscored in many studies. Nevertheless, terms like "submediterranean" and "downy oak" are some of the most faintly understood concepts in the European phytogeographical and taxonomical research. Downy oak is well known to be a problematic taxon: the name "Quercus pubescens" (= Q. humilis) piles together populations characterized by an increasing phenotypic and genomic polymorphism along north-south gradients, which is commonly explained as the result of a "founder effect" given by a relatively fast post-glacial re-colonization of the northern stands through rare long-distance dispersal events. O…
Unpublished aspects of hygrophilous wood vegetation from Nebrodi mountains (N-E Sicily)
2021
In this paper we report the results of a study done on the vegetation of hygrophilous woods and shrubs occurring along the sub montane and montane small rivers of the Alcantara watershed located in the Nebrodi Mountains (N-E Sicily). We have described two new associations: Alno glutinosae-Salicetum rubentis and Euonymo europaei-Salicetum lambertianae, both belonging to the class Salici purpureae-Populetea nigrae. The forest association would belong to the alliance Populion albae of the order Populetalia albae, while the shrubs of pebbly streams would give origin to communities that would belong to the alliance Salicion albae of the order Salicetalia purpureae. The study gave the occasion to…
La classe Parietarietea judaicae Oberd. 1977 in Italia.
2002
The class Parietarietea judaicae Oberd. 1977 in Italy. On the basis of literature and unpublished data, a synthesis on the synanthropic chasmophilous perennial vegetation occurring in the Italian territories has been carried out. These plant communities are linked to masonry walls and rocky faces heavily disturbed by man, and are dominated by hemicryptophytes, chamaephytes and bryophytes. From the syntaxonomical point of view, in accordance with the majority of the authors who studied the matter, the wall vegetation should be ascribed to a well-distinguished class, Parietarietea judaicae Oberd. 1977, rather than to the Asplenietea trichomanis class, as proposed by other authors. Within the …
Syntaxonomical survey of Geranio-Cardaminetalia hirsutae: Semi-natural therophytic vegetation of the Mediterranean region
2007
A syntaxonomical scheme, including geographical range and synonymies of all the associations ascribed to Geranio-Cardaminetalia hirsutae, is presented. This order, framed into the class Stellarietea mediae, groups sciaphilo-subnitrophilous annual vegetation of natural and semi-natural habitats, commonly occurring on substrata rich in organic matter, accumulating on stone-walls, shaded rocks and initial soils, often under the canopy of shrubs and trees. Twelve new associations from Sardinia, Sicily, Egean islands and Israel are here described for the first time.