Search results for "mediterranean sea."
showing 10 items of 830 documents
Flow resistance ofPosidonia oceanicain shallow water
2006
Management of coastal waters and lagoons by mathematical circulation models requires determination of the hydraulic resistance of submerged vegetation. A plant typical of sandy coastal bottoms in the Mediterranean Sea is Posidonia oceanica, which is constituted by very thin and flexible ribbon-like leaves, about 1 cm wide and up to 1.5 m long, and usually covers the bottom with a density of 500-1000 plants/ m2. From the hydraulic viewpoint, P. oceanica constitutes a particular roughness, because, as the velocity increases, the leaves bend more and more until they lie down on the bottom. Although P. oceanica is widespread, in the technical literature it is difficult to find indications about…
Characterisation of submarine groundwater discharge offshore south-eastern Sicily
2005
A complex approach in characterisation of submarine groundwater discharge (SGD) off south-eastern Sicily comprising applications of radioactive and non-radioactive tracers, direct seepage measurements, geophysical surveys and a numerical modelling is presented. SGD fluxes in the Donnalucata boat basin were estimated by direct seepage measurements to be from 4 to 12Ls(-1), which are comparable with the total SGD flux in the basin of 17Ls(-1) obtained from radon measurements. The integrated SGD flux over the Donnalucata coast estimated on the basis of Ra isotopes was around 60m(3)s(-1) per km of the coast. Spatial variations of SGD were observed in the Donnalucata boat basin, the average (222…
Permian of South Europe and its interregional correlation
2000
This contribution is a synthesis of knowledge about the Permian of South Europe, which mainly consists of continental, terrigenous and igneous deposits. Marine sediments crop out in a few Italian areas (eastern Southern Alps, central-southern sectors of the peninsula and Sicily), as well as spread from the ex-Yugoslavia to the present Mediterranean sea, where they represent the westermost patterns of the old Tethys. In this context, data and interpretations vary sensibly from one region to another. Despite this, we have tried to establish the most typical events or features. Although the correlation and nature of some are still in doubt, the effort of reconstructing them is significant. Val…
I traffici illeciti nell’area del Mediterraneo. Prevenzione e repressione nel diritto interno, europeo ed internazionale
2018
Il testo presenta il tema dei traffici illeciti nel Mediterraneo, oggetto del VIII Corso “Giuliano Vassalli” per dottorandi, svoltosi a Noto nel 2017, anche in relazione ai contributi dei partecipanti ai lavori, una selezione dei quali è stata pubblicata sulla stessa rivista The text presents the topics of the illicit traffics in the Mediterranean area, which was the subject of the 8th Training Course "Giuliano Vassalli" for PhD Candidates, held in Noto in 2017. The remarks are complemented by references to the contributions of the participants selected for the pubblication in the same review.
In situ recordings of large gelatinous spheres from NE Atlantic, and the first genetic confirmation of egg mass of Illex coindetii (Vérany, 1839) (Ce…
2021
AbstractIn total, 90 gelatinous spheres, averaging one meter in diameter, have been recorded from ~ 1985 to 2019 from the NE Atlantic Ocean, including the Mediterranean Sea, using citizen science. More than 50% had a dark streak through center. They were recorded from the surface to ~ 60–70 m depth, mainly neutrally buoyant, in temperatures between 8 and 24°C. Lack of tissue samples has until now, prohibited confirmation of species. However, in 2019 scuba divers secured four tissue samples from the Norwegian coast. In the present study, DNA analysis using COI confirms species identity as the ommastrephid broadtail shortfin squid Illex coindetii (Vérany, 1839); these are the first confirmed …
Gas chromatographic determination of organochlorine pesticides; contamination of dicofol, fenson, and tetradifon in fish and natural waters of a wet …
1986
Nei luoghi dell'accoglienza. Progetti per Lampedusa e Palermo
2014
Il libro raccoglie gli esiti della ricerca e della didattica dei Laboratori di Progettazione architettonica del terzo anno, svolti presso il corso di Laurea Magistrale in Architettura LM4 della Scuola Politecnica dell’Università degli Studi di Palermo, sul tema dell’accoglienza a Lampedusa e a Palermo. L’obiettivo è quello di presentare la composita esperienza di progetto e di ricerca prodotta intorno all’argomento e nello stesso tempo attivare un confronto sul paesaggio e sugli spazi urbani della città. Il libro cerca di sviluppare un percorso di ricognizione e di conoscenza attraverso l’elaborazione di progetti didattici in grado di produrre idee per la città e il territorio. The book con…
Malta and Sicily Joined by Geoheritage Enhancement and Geotourism within the Framework of Land Management and Development
2018
Malta and Sicily, which lie at the centre of the Mediterranean Sea, share a long history and have unique geological and geomorphological features which make them attractive destinations for geotourism. In the framework of an international research project, a study for the identification, selection and assessment of the rich geological heritage of Malta and Sicily was carried out, aiming to create a geosite network between these islands. Based on the experience and outputs achieved in previous investigations on geoheritage assessment carried out in various morpho-climatic contexts, an integrated methodology was applied for the selection, numerical assessment and ranking of geosites. The sele…
Unpublished Mediterranean records of marine alien and cryptogenic species
2020
Este artículo contiene 18 páginas, 4 figuras.
Island incidence and mainland population density: Mammals from Mediterranean islands
2002
. The reasons why some species are resistant to extinction or are better invaders of islands than others remain unexplained. In this study, we test the hypothesis that mammals living on the mainland at higher density than predicted by the density/body mass relationship have a much greater chance to colonize a small island successfully, and/or that they are less likely to become extinct when living on small islands. For this, we used data compiled on mammals from a number of Mediterranean islands. We show a nested pattern for mammals on western Mediterranean islands, which suggests that the distribution of mammals on these islands is not the result of a random process. Using two comparative …