Search results for " central Mediterranean."

Nuovi dati biologici e geonemici su Lehmannia melitensis (Lessona & Pollonera, 1882) e Ambigolimax valentianus (A. Férussac, 1823) (Gastropoda: Limac…

2018

Nuovi dati biologici e geonemici sono riportati per Lehmannia melitensis (Lessona & Pollonera, 1882) e Ambigolimax valentianus (A. Férussac, 1823). In particolare, vengono fornite nuove località siciliane di L. melitensis mentre A. valentianus viene segnalato per la prima volta nelle isole italiane di Sardegna, Sicilia e Pantelleria e nell’isola maltese di Gozo. Le due specie, a volte simili nella morfologia esterna, si distinguono con certezza solo attraverso l’esame degli organi genitali. New records from Sicily are provided for Lehmannia melitensis (Lessona & Pollonera, 1882). Ambigolimax valentianus (A. Férussac, 1823) is recorded for the first time from the italian islands of S…

Recognition of water masses according to geochemical signatures in the Central Mediterranean sea: Y/Ho ratio and rare earth element behaviour

2007

This study reports the results of geochemical investigations carried out in the Strait of Sicily (Central Mediterranean Sea) during the oceanographic cruise BANSIC 2000, focusing on the area around the Pantelleria Island. We evaluate the interface processes between dissolved phase and suspended particulate matter in the water columns on the basis of Y/Ho ratio and rare earth elements and yttrium distributions that are suitable to trace the occurrence of different water layers in Central Mediterranean Area. The main source of trace elements to the sea water system was recognized in the atmospheric fallout, while different scavenging mechanisms among Y and rare earth elements occur. Cation ex…

YTTRIUM AND REE SIGNATURE RECOGNIZED IN CENTRAL MEDITERRANEAN SEA (ODP SITE 963) DURING THE MIS 6 – MIS 5 TRANSITION

2010

The Mediterranean Sea acts as a miniature ocean with the development of its own conveyor belt. It constitutes an ideal location to study and forecast how the marine environment responds to rapid climatic change. Here we present a palaeoenvironmental study carried out on the sediments of ODP Site 963, recovered in the Sicily Channel, the sill which divides the western from the eastern Mediterranean basin. We focused on the transition between the penultimate glacial (MIS 6) and the last interglacial (MIS 5), between approximately 130 and 115 kyr BP. A novel approach is proposed, taking into account centennial-scale geochemical data on major elements, selected trace elements, and yttrium and R…

An integrated approach to investigate the seismotectonics of northern Sicily and southern Tyrrhenian

2009

Abstract This paper deals with a comparison among recent structure and seismicity in the hinge zone between northern Sicily and southern Tyrrhenian, corresponding to both emerged and submerged northern portion of the Maghrebian chain. This hinge zone is part of a wider W–E trending right-lateral shear zone, mainly characterized by both a synthetic NW-SE/W–E oriented, and antithetic left-lateral N–S/NE-SW fault systems, which has been affecting the tectonic edifice, since the Pliocene. The inland structures have been mapped using aerial-photo interpretation, geological mapping and mesostructural analysis to reconstruct the stress regime in the study area. On the contrary, the offshore struct…

Hinterland-Verging Thrusting in the Northern Sicily Continental Margin: Evidences for a Late Collisional Stage of the Sicilian Fold and Thrust Belt?

2018

The Sicilian Fold and Thrust Belt developed during Neogene-Quaternary times characterized by main African-wards tectonic transport direction. Recent investigations highlighted extensive hinterland-verging tectonic structures active during late Pliocene-Pleistocene time suggesting a late collisional stage of the Sicilian Fold and Thrust Belt that could be a precursor of a change in the subduction polarity in the central belt of Mediterranean.

Larval fish assemblages in the central Mediterranean Sea: spatio spatio-temporal dynamics and biological effect on early life stage of Sardinella aur…

Calcareous Nannofossil Biostratigraphy and Chronostratigraphy of ODP Hole 964D (eastern Mediterranean Sea)

2008

Quantitative analyses of calcareous nannofossil were carried out on sediments from ODP Hole 964D succession, recovered in the Ionian Sea, Eastern Mediterranean. Results show that the sedimentary sequence, spanning from about 3.5 Ma (Early Pliocene) to the Present, has been investigated through an average sampling resolution of less than 30 kyr. The detailed subdivision into 11 biozones makes it possible to recognize chronostratigraphic the boundaries in the Early Pliocene-Middle Pleistocene interval. Finally, two sedimentary gaps, lasting at least 340 kyr and 120 kyr respectively, have been recognized between the Zanclean and Piacenzian and in the lower part of the Early Pleistocene. SHORT …

The Eurasian spoonbill Platalea leucorodia in Sicily between 1972 and 2018, distribution and ecology

2020

The observations of the Eurasian spoonbill made in Sicily between 1972 and 2018 were collected and analyzed. The presences, initially scarce and referred to a few sites, have consolidated over time, and gradually have affected an increasing number of sites. The observations were concentrated in the coastal salt pans and exsalt pans systems, secondarily in the mouths and in inland waters, below 100 m a.s.l.. The greatest number of Eurasian spoonbill was found in the migration period, both post and pre-reproductive; in the summer the lowest values. The average number of birds per flock, compared to subsequent years, from November to January did not vary significantly, while it was variable in…