Search results for " Paleoecologia"

Sulfur cycling and methanogenesis primarily drive microbial colonization of the highly sulfidic Urania deep hypersaline basin

2009

Urania basin in the deep Mediterranean Sea houses a lake that is >100 m deep, devoid of oxygen, 6 times more saline than seawater, and has very high levels of methane and particularly sulfide (up to 16 mM), making it among the most sulfidic water bodies on Earth. Along the depth profile there are 2 chemoclines, a steep one with the overlying oxic seawater, and another between anoxic brines of different density, where gradients of salinity, electron donors and acceptors occur. To identify and differentiate the microbes and processes contributing to the turnover of organic matter and sulfide along the water column, these chemoclines were sampled at a high resolution. Bacterial cell numbers…

SEA-LEVEL AND CLIMATIC CHANGES DURING THELAST 41,000 YEARS IN THE OUTER SHELF OF THE SOUTHERN TYRRHENIAN SEA: EVIDENCE FROM FORAMINIFERA AND SEISMOST…

2012

DEEP RHODOLITH BEDS IN THE USTICA ISLAND (SICILY, SOUTHERN TYRRHENIAN SEA): A SEDIMENTARY AND PALEOECOLOGICAL APPROACH

2018

The results of a multidisciplinary study conducted on the circali- ttoral soft bottom assemblages at Secchitello (Sicchiteddu) and in the neighbouring areas along the southern coast of Ustica Island (Sicily, Southern Tyrrhenian Sea) are presented. In particular, the study pro- vided useful data for a taxonomic, ecological and paleoecological revi- sion of the Coastal Detritic facies with free-living calcareous algae and for a critical analysis of their relationship with the sedimentary dynamics. During a survey, carried out by the University of Catania (1991) with a R.O.V. (remotely operated vehicle), the presence of the Coastal Detritic (DC) biocoenosis, characterized by a surprisingly hig…

Le faune a mammiferi della Sicilia tra il Tardoglaciale e l’Olocene

2011

A check-list of Sicilian terrestrial mammals from Late Glacial to the Holocene has been compiled and a quantitative methodology of data analysis to calculate their occurrence and extinction rates has been adopted, in order to synthesize the temporal turnover of mammal species occurred during the last 17,5 ky. In such interval Sicily, probably passed from a fully connection (via a temporary land bridge generated by eustatic change of sea level) with Southern Calabria to the present isolation phase. To better focus the faunal turnover, this temporal interval has been subdivided into three phases: Late Glacial, ancient and recent Holocene. 28 Mammal taxa were recorded: 17 in the Late Glacial, …

ASPRACOAST: A model of integrated coastal zone management of the eastern part of the Gulf of Palermo (Sicily, Italy)

2009

ASPRACOAST: Modello di gestione ambientale della fascia costiera del comune di Bagheria

2008

Paleoecologia dei gruppi umani preistorici, protostorici e storici della Sicilia centro occidentale

2011

Cyclic Fluctuations, Climatic Changes and Role of Noise in Planktonic Foraminifera in the Mediterranean Sea

2004

Middle and Upper Jurassic record in the Western Sicily successions

2015

Middle-Upper Jurassic successions cropping out in western Sicily have been the subject of detailed sedimentological, stratigraphic and palaeontological studies over the last 15 years based on the analysis of ammonite associations. Studies are preferentially focused on the Bathonian-Tithonian chronostratigraphic interval. Some studied successions represent the type-locality of many ammonite species defined by G.G. Gemmellaro, while others have been known only in Sicilian geological literature. The examined sequences were sedimented in different depositional environments (moderately deep external carbonate platform) called Domains, more precisely, the Trapanese and Saccense Domains (TP, Trapa…

A new small mammal assemblage from the Pirro 12 “Terre Rosse” fissure filling (Gargano, Southeastern Italy).

2011

The Pirro 12 fissure filling has been discovered and sampled by a team of the University of Torino during the 2005 field survey in the Dell’Erba Quarry (Apricena, Foggia). The occurrence of a very small Deinogalerix and of a very simple Mikrotia supported, at a first glance, the very old position of Pirro 12 in the biochronological succession of endemic faunal settlements of Gargano (Villier, 2011). In this communication the preliminary result of taxonomic studies of the small mammal assemblage of the Pirro 12 filling is presented. The Gliridae is by far the most common family in this site. Two species of the endemic genus Stertomys have been identified: the small-sized Stertomys cf simplex…