1,721,120 research outputs found
FIGURE 1 in Exploring plant species richness along the Tiber River within the city of Rome
No full textFIGURE 1. Study area. From left, extension of the Tiber River basin in Italy, complete course of the Tiber River, stretch of the Tiber River crossing the metropolitan area of Rome bounded by the Grande Raccordo Anulare (GRA). The urban Tiber stretch was subdivided in the following sectors: upper (U), middle (M), lower (L) and terminal (T).Published as part of Ceschin, Simona & Salerno, Giovanni, 2021, Exploring plant species richness along the Tiber River within the city of Rome, pp. 143-158 in Phytotaxa 482 (2) on page 144, DOI: 10.11646/phytotaxa.482.2.3, http://zenodo.org/record/541888
Plants as bioindicators for archaeological prospection: a case of study from Domitian's Stadium in the Palatine (Rome, Italy)
No full text""In this study, we analyzed the relationship between buried archaeological remains (masonries, pavements, and ancient ruins) and spontaneous vegetation. growing above them. We carried out several. vegetation surveys in the Domitian’s Stadium at the. archaeological site of the Palatine (Rome). Vegetation. data were collected using the Braun-Blanquet approach. and elaborated using statistical analyses (cluster. analysis) to assess the similarity among surveys.. Structural, chorological, and ecological features of the. plant communities were analyzed. Results showed that. the vegetation responds significantly to the presence. of sub-emerging ancient remains. The plant bioindication of this phenomenon occurs through the following floristic-vegetation variations: phenological alterations. in single individuals (reduction in height, displacement of flowering\\\/fruiting period), increase of annual species. and decrease of perennial ones, decrease of total. plant coverage, reduction of maturity level of the vegetation which remains blocked at a pioneer evolutive. stage. The presence of sub-surfacing ruins manifests. itself through the dominant occurrence of xerophilous. and not-nitrophilous species (e.g., Hypochaeris achyrophorus L., Aira elegantissima Schur, Trifolium scabrum L. ssp. scabrum, Trifolium stellatum L., Plantago lagopus L., Medicago minima (L.) L., and Catapodium rigidum (L.) C.E. Hubb. ex Dony ssp. rigidum) and in a rarefaction of more mesophilous and nitrophilous. species (e.g., Plantago lanceolata L., Trifolium pratense L. ssp. pratense, Trifolium repens L. ssp. repens, and Poa trivialis L.). Therefore, the vegetation can be used as bioindicator for the detection of buried ruins,. contributing in the archaeological prospection for a general, fast, and inexpensive interpretation of the underground."
Contributo alla conoscenza floristica dell’area archeologica del Palatino (Roma)
No full textThe present work shows
the results of a floristic research carried out from the years 1998 to 2000 in the archaeological area of Palatine (in the centre of Rome). The conservative management adopted in respect of the ancient rests has allowed to maintain and protect here precious green areas; these places give hospitality to a rich and various spontaneous flora. We have found 342 species, belonging to 78 families and 231 genera; some are interesting because new for Rome (Cuscuta planiflora, Orobanche picridis and Romulea columnae subsp. columnae) or for their rarity in the Roman e Latial contest (Polygonum rurivagum, Orobanche ramosa subsp. nana, Sisymbrium irio, Securigera cretica, Ruta chalepensis, Trachelium caeruleum and others like Allium subhirsutum, Minuartia hybrida, common in the examined area but not in Rome). The spontaneus orchids Ophrys sphegodes, Orchis coriophora, Serapias vomeracea, Serapias parviflora and Spiranthes spiralis deserve a particular attention because, in the urban context of Rome, they find at the Palatine a “privileged” place. The biological spectrum shows the prevalence of therophytes (45,9%), followed by hemicriptophytes (28,1%), in accordance to the pedo-climatic features and the type of management of the area. The chorological analysis underlines the predominance of Euri-Mediterranean (26%) on Steno-Mediterranean elements (18,1%), indicating a less dry microclimate in comparison with the surrounding zones, because of the presence of relatively vast green areas. The widespread entities have an high percentage (25,1%), in relation to the synanthropic contest in which the research has been carried out
A morphological investigation of the alien Ludwigia species in Italy: towards a new key for unambiguous identification
No full textThe two freshwater plants Ludwigia hexapetala and L. peploides subsp. montevidensis, invasive in Europe including Italy, can colonise aquatic and bank habitats and possess remarkable morphological plasticity.
They can be distinguished mainly by floral characters, while in the vegetative phase they show morphological similarities, making their identification difficult. In some cases, incorrect identification of
these species generated confusion in the reference literature. This study aimed to define the morphological differences between L. hexapetala and L. peploides subsp. montevidensis to provide an identification key for these two species even when not flowering. Morphological quantitative and qualitative characters of 138 samples were measured and evaluated. PCA was performed, and each character was compared between the two species in each morphotype. The two species showed significant differences between morphological vegetative characters. Ludwigia hexapetala is associated with longer leaf length/width ratio, matte leaves with no petiole, erect rough stems when flowering, and high frequency of pneumatophore production. Conversely, L. peploides subsp. montevidensis is associated with shorter leaf length/width ratio, shiny leaves with a distinguishable petiole, and creeping, sticky stems. Our morphological study provides a taxonomic identification key for L. hexapetala and L.
peploides subsp. montevidensis, allowing accurate identification even in the vegetative phase
Contributo botanico all’Atlante storico-ambientale del territorio di Anzio e Nettuno
No full textAspetti storico-naturalistici di Anzio e Nettun
La vegetazione del basso corso del Fiume Tevere e dei suoi affluenti (Lazio, Italia). Fitosociologia
No full textThe vegetation of the terminal course of the Tiber River and of its affluents (Latium, Italy). The aquatic and riverbank vegetation of the Tiber River’s
terminal course and of its main affluents (Treia, Farfa, Aniene) are described. The phytosociological approach is applied and, utilizing ecological and
water chemical-physical analysis, it has been possible to define more accurately the synecology of macrophytes communities. This study allowed to
identify thirty-one vegetational types, among which aquatic communities mainly belonged to classes Lemnetea minoris and Potametea pectinati,
bank macrophyte types to Phragmito-Magnocaricetea and, in conditions of higher human disturbance, to Bidentetea tripartitae. The woody riparian
vegetation has been included in Salicetea purpureae and Querco-Fagete
Variazioni floristiche temporali come bioindicatori di cambiamenti ambientali nel tratto terminale del fiume Tevere
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