Search results for "phytosociology."

The orophilous dwarf-shrub vegetation of Mt. Troodos (Cyprus).

2005

A phytosociological survey on the orophilous dwarf-shrub vegetation of Mt. Troodos (Cyprus) is presented. Four associations are described, the first three being linked to the upper supramediterranean bioclimatic belt: Nepeto troodi-Hypericetum stenobotryos, dwelling the summit plateaux on ultramaphic sediments, Salvietum willeanae, substituting the previous one in hollow sites, where the snow-cover lasts longer, Onosmo troodi-Astragaletum chionistrae, colonizing eroded soils on steep, windy slopes, Alysso cyprici-Genistetum crudelis replacing the Nepeto troodi-Hypericetum stenobotryos at lower altitudes, within the lower supramediterranean belt. Due to the noteworthy floristic autonomy of t…

A survey of the weedy communities of Sicily

2007

As Sicily has been a central crossroads of human activity for thousands of years, it offers a major perspective on the Mediterranean weedy plant communities. This syntaxonomical survey of the Sicilian weedy vegetation groups together for the first time 30 plant associations, that have been described from the main and neighboring island in the last three decades. The surveyed vegetation is ascribed to the classes Papaveretea rhoeadis and Stellarietea mediae, whose floristic autonomy is here discussed, and to the orders Aperetalia spicae-venti and Papaveretalia rhoeadis for the former, Polygono-Chenopodietalia polispermi, Solano-Polygonetalia convolvuli, Thero-Brometalia and Urtico-Scrophular…

La vegetazione psammofila della Sicilia settentrionale

2010

Coastal sand dune vegetation of Northern Sicily from Termini Imerese (Palermo) to Capo Peloro (Messina) was examined. The study revealed the presence of low dunes whose evolution and development is biased either by the local coast mophogenetic processes or due to the high anthropogenic pressure. Several associations referred to the classes Cakiletea and Ammophiletea were found, and, in particular: Salsolo kali- Cakiletum maritimae, Cakilo maritimae-Xanthietum italici, Salsolo kali-Euphorbietum peplis, Glaucio flavi-Matthioletum tricuspidatae, Sporoboletum arenarii, Cypero capitati-Agropyretum juncei, Medicagini marinae-Ammophiletum australis and Centaureo sphaerocephalae-Ononidetum ramosiss…

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 On the basis of literature and unpublished data, a synthesis on the synanthropic chasmophilous perennial vegetation occurring in the Italian territories has been carried out.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 …

The Lygeo-Stipetea class in Sicily

2010

Basing on literature data and unpublished relevés from Sicily, a survey of the syntaxa belonging to the class Lygeo-Stipetea Rivas-Martínez 1978 is presented. This perennial vegetation is characterized by the dominance of big caespitose hemicryptophytes, and it is widely distributed in Sicily from the sea level up to 1500 m a.s.l. The class is represented in Sicily by two orders, floristically and ecologically well differentiated: Lygeo-Stipetalia, including the sole alliance Moricandio-Lygeion exclusively of clayey substrates, and Hyparrhenietalia hirtae, including five alliances (Hyparrhenion hirtae, Avenulo cincinnatae-Ampelodesmion mauritanici, Thero-Brachypodion ramosi, B…

The Querco-Fagetea class in Sicily: an example of boreal temperate vegetation in the central Mediterranean area

2011

Datos sobre las tiledas ibéricas (Tilio-Acerion Klika 1955)

2008

Se aportan datos sobre las tiledas ibéricas, que se agrupan en tres asociaciones fitosociológicas dentro de la alianza Tilio-Acerion: Hedero-Tilietum platyphylli (pirenaica y prepirenaica), Helleboro occidentalis-Tilietum platyphylli (orocantábrica) y Ononido aragonensis-Tilietum platyphylli (oroibérica). En el seno de la primera se proponen dos nuevas subasociaciones: la típica, fraxinetosum excelsioris (pirenaica, silicícola, con estratos arbóreo y herbáceo muy ricos), y festucetosum gautieri (prepirenaica, calcícola y más pobre florísticamente), que pretenden explicar algunas variaciones observadas en su área de distribución. El nombre Ononido-Tilietum se propone como nuevo para remplaza…

Syntaxonomy and ecology of mesophilous scrub vegetation in Tajikistan (Middle Asia)

2022

Aims: In this paper we propose the first syntaxonomic classification for the mesophilous scrub vegetation in Tajikistan with some remarks on their environmental variability. Methods: Altogether 120 relevés were sampled using the standard, seven-degree cover-abundance scale of Braun-Blanquet, in 2015–2021. They were classified by the modified TWINSPAN method using the four step interval scale with cutoff levels of 0%, 2%, 5% and 10% and total inertia as a measure of cluster heterogeneity. Diagnostic species were identified using the phi coefficient as a fidelity measure. Detrended Correspondence Analysis (DCA) was used to determine the relationship between the sampled plots, vegetation units…

Distribution, ecology and conservation survey on Trifolium michelianum Savi (Fabaceae) in Sicily (Italy)

2013

We report the identification of four residual stations for Trifolium michelianum Savi (Fabaceae) in Sicily, whereas the species was documented to be extinct at the Gorgo Cerro station (western Sicily), the only locality previously reported in the literature. In addition to an update on the distribution of the species, a survey on the new Sicilian populations led to their biological, ecological and phytosociological characterization, as well as to an assessment of the risk factors. The species, here relegated to the limit of its distribution area, occurs in particularly sensitive and vulnerable environments, such as the “Mediterranean temporary ponds”, considered “priority” by the Council Di…

Spatial representation of vegetation and floristic diversity at landscape scale: the Italian experience

2016

The application of phytosociology to the analysis of vegetation and landscape diversity has greatly developed in Italy during the past 60 years. The analysis of the scientific production of this period is therefore fundamental for a reflection on vegetation mapping and may be useful to forecast future scenarios of this discipline (Bruno et al., 2003). Many different documents related to the plant species distribution and diversity became available over time from different land units of Italy. In particular, interesting examples of mixed floristic and vegetation maps have been produced in a pilot project for the province of Palermo (Sicily) and used in the diagnosis of environmental heteroge…