Search results for "PHYTOSOCIOLOGY"
showing 10 items of 85 documents
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…
Anotaciones sobre Lasiopogon muscoides (Desf.) DC. (Compositae) en la Comunidad Valenciana
2014
Se dan a conocer nuevos datos sobre Lasiopogon muscoides, planta autóctona de la flora de la Comunidad Valenciana (E de España), en cuyas comarcas centrales alcanza su límite septentrional de distribución. Se aporta por primera vez información concreta sobre su ubicación y su comportamiento ecológico y fitosociológico. Además, dada su rareza y originalidad en el conjunto de la flora de este territorio, se propone su inclusión en el Catálogo Valenciano de Especies de Flora Amenazadas con la categoría “en peligro de extinción”. New data are reported on Lasiopogon muscoides in the Valencian Community (E of Spain), a territory in which its northernmost distribution is found. Data are shown for …
Adianto-Pinguiculetum saetabensis (Pinguiculion longifoliae): a new rupicolous Saetabensian plant association
2019
Se describe una nueva asociación vegetal, Adianto capilli-veneris-Pinguiculetum saetabensis (All. Pinguiculion longifoliae), dominada por Pinguicula saetabensis, Adiantum capillus-veneris y Erica terminalis, que resulta endémica de las áreas termomediterráneas de la Sierra de Enguera (C-S de la provincia de Valencia). Es una comunidad rara y muy frágil, propia de grietas y oquedades de balmas y roquedos calizos donde se depositan tobas calcáreas, que permanecen húmedas y rezumantes durante buena parte del año. Se aportan asimismo datos sobre la composición florística, comportamiento ecológico, distribución y estado de conservación de este hábitat. A new plant association, Adianto capilli-ve…
A new Saetabensian subrupicolous black-sedge community: Erico terminalis-Schoenetum nigricantis (Molinio-Holoschoenion)
2019
Se describe una nueva asociación vegetal, Erico terminalis-Schoenetum nigricantis (All. Molinio-Holoschoenion vulgaris), dominada por Schoenus nigricans, Erica terminalis y E. erigena, que resulta endémica de las áreas termomediterráneas de las sierras de elevación media o baja del sur de la provincia de Valencia. Es un juncal negro de alta densidad, pero florísticamente muy pobre, que crece en la base de balmas y roquedos calizos rezumantes, donde se acumulan tobas calcáreas y depósitos terrosos, que permanecen húmedos buena parte del año gracias a surgencias temporales de agua. Se aportan asimismo datos sobre la composición florística, comportamiento ecológico, distribución y relaciones d…
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…
Distribution maps of vegetation alliances in Europe
2022
Aim The first comprehensive checklist of European phytosociological alliances, orders and classes (EuroVegChecklist) was published by Mucina et al. (2016, Applied Vegetation Science, 19 (Suppl. 1), 3-264). However, this checklist did not contain detailed information on the distribution of individual vegetation types. Here we provide the first maps of all alliances in Europe. Location Europe, Greenland, Canary Islands, Madeira, Azores, Cyprus and the Caucasus countries. Methods We collected data on the occurrence of phytosociological alliances in European countries and regions from literature and vegetation-plot databases. We interpreted and complemented these data using the expert knowledge…
A new naturalized alien plant in Sicily: Cotula australis (Sieber ex Spreng.) Hook. f. (Asteraceae) on the Acropolis of Lipari Island (Aeolian Archip…
2018
In February 2018 a copious population of Cotula australis Hook f. (Asteraceae, Anthemideae) was found on the cobblestones of the Acropolis of Lipari Island (Aeolian Archipelago, NE Sicily). This population represents the first record in southern Italy and is located at a distance of about 470 km as the crow flies from the nearest neighbour. From the phytosociological point of view, C. aus- tralis dominates a therophytic subnitrophilous dwarf vegetation of trampled sites which can be ascribed to the cosmopolitan class Polygono-Poetea annuae Rivas Mart. 1975. This plant communi- ty is proposed as a new association, Galio muralis-Cotuletum australis, which can be considered a Mediterranean vic…
The vegetation of temporary ponds of Sardinia
2009
The Mediterranean temporary ponds are considered priority habitat in the Directive 92/43/EEC (habitat n. 3170*) and detailed information on their floristic composition and susceptibility to invasive species seems a central issue for their preservation, because the development and maintenance of seasonal vegetation is merely the resultant of the development and maintenance of its component individuals. Sardinia presents fairly large extensions of land where such habitats are still well represented, thought not investigated in depth. Basing on literature and unpublished data, a survey on the current phytosociological knowledge of the temporary ponds of Sardinia is presented. Our field studies…
Phytosociological characterization of the Celtis tournefortii subsp. aetnensis microwoods in Sicily
2014
A work on the Celtis tournefortii subsp. aetnensis vegetation, endemic species located in disjointed sites in the Sicilian inland, is here presented. It forms microwoods with a relict character established on screes and detrital coverages, on a variety of lithological substrates (volcanics, limestones, quartzarenites). Based on the phytosociological analysis carried out in the territory, these vegetation aspects are framed in the alliance Oleo-Ceratonion, within which a new association (Pistacio terebinthi-Celtidetum aetnensis) is described, in turn diversified in the following subassociations: a) typicum subass. nova, on detrital calcareous cones of the north-western part of Sicily, in the…