The pale green dense Tor-grass (Brachypodium rupestre) tufts are a quite distinctiveaspect of the Italian grassland pattern of the colline and submontane belts. B. rupestreis used to be found in secondary grasslands both in natural environments and in someaspects of the post-coltural environments such as forest clearances, abandoned terraced andextensive pastures. In northern Italy (Alps, Prealps and northern Apennines) B. rupestrehas only sporadically been considered in the grasslands syntaxonomic frameworks.On the contrary it occurs in those regarding the central Italy where several semi-naturaland post-coltural grassland associations (e.g. Polygalo flavescentis-Brachypodietum,Galio lucidi-B. Dorycnio-B. etc.) were described. As far as the southern Italy is concernedonly the Polygalo mediterraneae-Brachypodietum is known whereas two new associationswere recently proposed for Sicily (Gianguzzi et al. 2018 submitted). As regards the syntaxonomicalranks higher than association, the majority of the B. rupestre communities wereclassified in the Festuco-Brometea and a minor part to the Trifolio-Geranietea. In particularDi Pietro et al., (2015) proposed the classification of the Italian Brachypodium rupestregrasslands in the following three alliances: Coronillo-Astragalion Ubaldi 2003 (flyschoideroded substrates); Cytiso-Bromion erecti Bonin 1978 (xerophilous mixed Brachypodiumrupestre and Bromus erectus on limestone) and Polygalo mediterraneae-Bromion erecti(Biondi, Allegrezza et Zuccarello 2005) Di Pietro in Di Pietro et al. 2015 (post-colturalor natural environments on pelithic-arenaceous or marly-clayey colluvial soils). On the otherhand Allegrezza et al. (2016) considered Brachypodium rupestre as a guide-species forthe sub-Mediterranean heliophilous forest edges and proposed a new suborder Dorycnioherbacei-Brachypodienalia (Asphodeletalia macrocarpi, Trifolio-Geranietea) a newalliance, Dorycnio herbacei-Brachypodion, and three new associations (Galio erecti-Brachypodietum, Laserpitio siculi-B. and Bituminario-B.). In this presentation a synoptictable including all the B. rupestre communities described for the Italian Peninsula hasbeen statistically analysed and discussed from a floristic and coenological point of view.From this analysis emerged that the B. rupestre communities described so far for theItalian peninsula are all characterized by the prevalence of the Festuco-Brometea speciesregardless of their original classification at the class rank.
|Numero di pagine||1|
|Stato di pubblicazione||Published - 2018|