Search results for "forest"
showing 10 items of 3780 documents
Spatial variability of ecophysiological performances and invasive potential of alien acacias (Acacia spp.) in Sicily and Lampedusa island (Pelagie Ar…
2012
Acacia spp. are among the most widespread and prominent invaders within Mediterranean-type ecosystems, where have already shown the capability to deeply change the characters and the functioning of invaded ecosystems (like in Portugal or S Africa: e.g. Holmes & Cowling, 1997; Hellmann et al., 2011). In Sicily, just in the last few years, two Australian Acacias, notably Acacia cylops A. Cunn. ex G. Don and A. saligna (Labill.) H.L.Wendl., started to regenerate abundantly within different areas (especially afforested sites). However their naturalization process has not been studied up to now.
Effetto dell’abbandono e del re-impianto dei vigneti sullo stock del carbonio organico nei suoli della Sicilia occidentale
2012
I cinghiali (Sus scrofa L.) come fattore di potenziale decremento della palma nana (Chamaerops humilis L.)
2010
Flora e fauna a rischio, colpa di un'errata reintroduzione di suidi
2015
Si compie una valutazione dei danni arrecati dalla reintroduzione degli ungulati in Sicilia.
Probabili impatti del cambiamento climatico sulla biodiversità delle foreste italiane
2012
The likely impact of climate change on the biodiversity of Italian forests. Based on literature results and our expert evaluation, we report some likely impacts of climate change on the biodiversity of forest communities in Italy by the end of this century. In the Mediterranean region and on the Apennines: at low altitudes, vulnerability of Pinus sp. and Quercus ilex forests, with loss of intraspecific genetic variability; transition from Mediterranean closed-canopy macchia to scattered shrublands; risk of local extinction for coastal populations of mesic/relic hardwood species (e.g., Quercus robur, Carpinus betulus, Zelkova sicula, Fraxinus sp.); ’eastern’ relic species like Quercus troian…
Holocene interactions between climate, vegetation, land-use and the fire regime in coastal Southern Sicily: evidences from new sedimentary records
2008
We used a new sedimentary record to reconstruct the Holocene vegetation and fire history of Gorgo Basso, a coastal lake in south-western Sicily (Italy). Pollen and charcoal data suggest a fire-prone open grassland near the site until ca 10,000 cal yr BP (8050 cal BC), when Pistacia shrubland expanded and fire activity declined, probably in response to increased moisture availability. Evergreen Olea europaea woods expanded ca 8400 to decline abruptly at 8200 cal yr BP, when climatic conditions became drier at other sites in the Mediterranean region. Around 7000 cal yr BP evergreen broadleaved forests (Quercus ilex, Quercus suber and O. europaea) expanded at the cost of open communities. The …
Il Club Alpino Italiano e la scoperta della montagna ovvero del vivere, del cantare, dell'andare e della scoperta scientifica della montagna, dei rim…
2019
il lavoro esamina la storia della scoperta della montagna come ambito naturale di vita, ricreazione e di studio, la formazione del CAI e le sue attività, l'influenza del CAI nel rimboschimento della montagna italiana.
La selvicoltura in Sicilia: problemi e prospettive
2009
In spite of their little surface, natural sicilian forests and reforestation are strongly heterogeneous due to environmental factors and anthropic activities. In Sicily forest surface was enriched by forestation activities that have been largely widespreaded in the last century. Also reforestations are mixed in terms of species in forest plantation. However, forestry use had not clear and continuous addresses because of lack of policy forestry in the time. For example, executive forest planning was deficient and very little plans have been drawn up. According to EU and national legislation, forest may be seen not only such as an environmental resource but also as an economic opportunity. Re…
La biodiversità delle formazioni naturali e seminaturali in Sicilia: cambiamenti e ipotesi di gestione
2009
A large part of the natural formations that occupied the surface of Sicily have disappeared because of heavy transformations beginning from the ancient time. These transformations have provoked the disappearance of entire communities plants and animals but the entity of these modifications can be only partially appreciated or assumed on the base of fragmentary data. Scope of this study is to evaluate changes in plant and animal communities in the course of the centuries. Until the end of the nineteenth century on the whole an equilibrium was established in the Island. The agricultural activity had surely changed the proportions of the habitats contributing to the spread of open spaces commu…
Trasformazioni del paesaggio e conservazione degli habitat nella zona umida di Vendicari (Sicilia)
2009
Il sito Natura 2000 “Vendicari” (ITA090002) si colloca in un più ampio sistema di zone umide costiere della Sicilia Sud-orientale. La particolarità di questi ambienti è legata alla presenza di lagune costiere e di formazioni vegetali che generalmente si trovano a contatto con esse. Questi ambienti costituiscono l’habitat per diverse specie, nonché esclusivi punti di sosta per molti uccelli migratori. Queste aree, un tempo più estese in Sicilia, durante il secolo scorso sono state sottoposte a disturbi e trasformazioni ambientali e paesaggistiche con conseguente riduzione della biodiversità. Le cause che hanno determinato maggiormente tali trasformazioni sono legate allo sfruttamento agricol…