Search results for "Clima"

Spatio-temporal patterns of Holocene vegetation change in southern Sicily

2012

Few examples of natural forest remain near the Mediterranean coast. Therefore, it is difficult to study how coastal forests respond to climatic change or their resilience to human impact. We developed new sedimentary record of Holocene vegetation and fire history at Lago Preola, a coastal lake in southwestern Sicily (Italy). In order to verify the existence of forest at large scale on the coast, we compare pollen from Lago Preola, a medium-sized lake (33 ha), to Gorgo Basso, a small lake (3 ha) located nearby with the aim of separating local from extra-local vegetation dynamics through time using pollen percentages and influx. We then compare Lago Preola pollen to the record from Biviere di…

Ornithological communities as indicators of recent transformations on a regional scale: the case of the Sicily island.

2014

A study on the Sicilian avifauna changes and its existing connections with the land use variations has been carried out from the 80s till today. We compared the Sicilian ornithological data acquired from the atlas maps with the regional land use maps data. We examined the land use variations and the distribution changes of some bird species on a regional level. To this aim, we analyzed the spatial distribution data of the birds in the period from 1984-1992 and 1993-2006. Moreover we examined the land use data of the period going from 1987-1988 and 1993-2000. After a preliminary analysis, we selected target species linked to different environments. Forest: Great spotted Woodpecker Dendrocopo…

Notes on the status and the current spread of Viburnum tinus L. (Viburnaceae) in Sicily (Italy)

2021

The authors carried out a multi-disciplinary research in order to clarify the native status of Viburnum tinus in Sicily and update the knowledge about its current regional distribution. With this purpose, a large amount of scientific papers on forestry, botany and palaeo- and archaeobotany was consulted; more useful data issued from papers focused on local historical gardens, from archives and from herbarium specimens. The available data suggest that most of the extant nuclei may issue from the recent colonization of plants introduced just few centuries ago. Although the status of the stands found in some warm and humid sites in the surroundings of the city of Palermo and on the Sicani Moun…

Genetic and morphologic diversity of European fan palm (Chamaerops humilisL.) populations from different environments from Sicily

2014

Chamaerops humilis is decreasing in abundance in Mediterranean Europe, which has induced the European community to call for its protection in Special Areas of Conservation. However, information about its genetic and morphological variability, which is crucial to the development of any conservation strategies, is insufficient. The present study aimed to investigate the genetic and morphological variability of C. humilis in Sicily, which was selected as a model because of the high number of dense populations. The relationships between morphological traits and climatic variables were studied to highlight patterns of adaptation to the environment, along with the genetic similarity among the pop…

Sustainable management of water as a strategy for preventing conflicts and enhancing unity in mediterranean countries affected by water scarcity and …

2009

Il fattore climatico dell’equazione universale per il calcolo della perdita di suolo

2008

I cambiamenti climatici ci priveranno della birra?

2018

In seguito ai cambiamenti climatici, da qui alla fine del secolo la produzione globale di orzo rischia di diminuire dal 3 al 17 per cento in media, a seconda di quello che sarà l’aumento reale delle temperature globali. E questa diminuzione si ripercuoterà in maniera ancora più significativa sul prezzo e sul consumo di birra, la bevanda alcolica più consumata al mondo. A sostenerlo è uno studio previsionale effettuato da ricercatori dell’Università di Pechino e dell’Università della California a Irvine

Parassiti, coltivazioni e clima che cambia: un link pericoloso

2018

Il riscaldamento globale porterà a una drammatica riduzione delle rese di frumento, riso e mais a causa dell’aumento delle popolazioni di insetti: per ogni grado Celsius di aumento delle temperature medie l’incremento delle perdite dovute ai parassiti varierebbe fra il 10 e il 25 per cento, a seconda della coltura e della regione di produzione.

Hydroseeding for revegetation in a semiarid Mediterranean environment

2012

Hydroseeding is a technique increasingly used to establish vegetation on degraded areas in order to perform environmental protection. The objective of this paper was to evaluate the effectiveness of four different hydroseeding methods on a degraded artificial slope in the southern Mediterranean area determining total vegetation cover, hydroseeding vegetation cover, hydroseeding success index (HSI), natural and hydroseeded vegetation height. The test area does not allow the use of any operating machine for soil and vegetation management, the only applicable technique is therefore hydroseeding. After hydroseeding was applied (December 2010), 21 checks were carried out every 15 days (from Janu…

Reproductive characteristics and differential response to seasonal temperatures of Blue and Great Tits (Cyanistes caeruleus & Parus major) in three n…

2011

The breeding ecology of the Blue Tit (Cyanistes caeruleus) and Great Tit (Parus major) was studied for 18 years in three different neighbouring habitats in Sicily, comprising oakwoods, reforested pine and a reforested mix of pine and broad-leaved trees. Both Blue and Great Tits laid eggs up to two weeks earlier in oakwoods than in the reforested areas. Our results indicate a statistically greater breeding success for both species in the oakwoods compared to reforested habitats, with the mixed reforested habitat having a greater success than that of reforested pine habitat. We also correlated reproductive characteristics with local air temperature to verify if the laying date of tits advance…