Search results for "Forestal"

Risultati di azioni di rimboschimento in diversi contesti pedoclimatici siciliani

2022

Nell’ambito delle attività sviluppate dalla regione siciliana nella redazione del Piano Forestale Regionale 2009- 2013, negli anni 2006/2007 sono stati realizzati 8 campi sperimentali in diversi contesti pedoclimatici siciliani (Bioclima: mesomediterraneo e supramediterraneo. Substrato: alluvionale, argilloso, calcareo, flyshioide, sabbioso/ siliceo) in 5 province siciliane (Agrigento, Enna, Messina, Palermo e Trapani). La scelta delle specie da piantare è stata compiuta sulla base di una suddivisione del territorio siciliano per aree ecologicamente omogenee compiuta dal gruppo di Selvicoltura di UNIPA, e utilizzata per fornire uno strumento operativo e vincolante per i progetti forestali r…

The ecological role of Pyrus Spinosa Forssk. in the ecosystem recovery and land restoration of Mediterranean woodlands

2021

In the Mediterranean basin, large areas still call for active reforestation, having a very low woody cover, thus resulting less resistant and resilient to climate change and suffering from a higher risk of soil degradation processes. Knowing the effects on soil fertility and carbon sequestration of single woody species can be of great practical importance, although being rarely tested. We aimed to assess the effect of Pyrus spinosa on soil fertility (soil carbon and nitrogen), microbial biomass and carbon sequestration (in aboveground stems) of Mediterranean pasturelands. The research was carried out in Ficuzza Nature Reserve (NW Sicily), where large areas are composed of extensive pasturel…

Variazioni delle comunità avifaunistiche, uso dell’habitat e loro ruolo nella costruzione dei sistemi agroforestali: il caso studio di Ficuzza.

2017

Le comunità avifaunistiche degli agro e silvosistemi del sud Italia subiscono una forte variazione stagionale dovuta al passaggio dei migratori ma soprattutto allo svernamento di intere comunità. Anche se questo fenomeno è ben noto, in Sicilia poche sono state le indagini per cercare di quantificare in modo sistematico queste variazioni. La ricerca è stata realizzata in un’area eterogenea della Riserva Naturale Orientata del Bosco di Ficuzza coprendo il gradiente dal bosco verso le aree arbustive e pascolive, con gli obiettivi di valutare le variazioni stagionali di questa comunità e in particolare di effettuare una indagine sull’uso dell’habitat. Parallelamente è stata condotta un indagine…

Pattern e driver spaziali e temporali della successione secondaria in un pascolo nelle aree aperte della Riserva Naturale di Ficuzza e prospettive di…

2021

Mentre la vegetazione naturale sta cedendo il posto alle aree agricole in molte aree del mondo, in altre, soprattutto in Europa, la rigenerazione naturale della vegetazione dopo l’abbandono dell'agricoltura sta cambiando il paesaggio. Nonostante l’importanza di questo fenomeno, le dinamiche spazio-temporali e il ruolo della copertura vegetale preesistente sono ancora poco studiati a piccola e media scala. Tali informazioni sono molto rilevanti sia per una migliore comprensione delle dinamiche naturali della vegetazione, sia per pianificare eventuali azioni di gestione per guidare dove necessario questi processi. In questo studio abbiamo quantificato il tasso di espansione, caratterizzato i …

Beavan C., 2010 - Un anno a impatto zero. Cairo Editore

2011

Earth-flow susceptibility assessment in the Marvello River basin (Sicily, Italy)

2014

In this study, statistical models of earth-flow susceptibility were prepared using logistic regression. The analyses were carried out in a small (51 km2) basin of western Sicily, where 1,376 earth-flows were identified. To predict the spatial distribution of the mapped landslides, outcropping lithology and seven topographic attributes were exploited as explanatory variables. Before calculating these variables, a reconstruction of the pre-failure topography was performed. To evaluate the predictive skill and the robustness of the models, two groups made of five random subsets of earth-flows and stable cells were prepared. Absences of the first group were selected as individual cells whereas …

UTILIZACIÓN DE TÉCNICAS DE FOTO-RECONSTRUCCIÓN 3D AUTOMATIZADA EN GEOMORFOLOGÍA: EJEMPLOS PARA DIFERENTES MORFOLOGÍAS Y ESCALAS

2014

Three-dimensional photo-reconstruction methods based on Structure from Motion (SfM) and MultiView-Stereo techniques (MVS) are tested for measuring, monitoring and quantifying three different geomorphological features: i) the Corral del Veleta rock glacier and ii) five small gully headcuts in Spain and iii) Calanchi type badland in Italy. Results about the accuracy, usefulness and applicability of these techniques are presented here. The results of these analyses showed centimeter-level accuracies with average distances to the benchmark models ranging from 0.009 m to 0.42 m.

Analisi morfometrica di due aree calanchive in Sicilia (Italia)

2012

Application of 3D Photo-reconstruction techniques in Geomorphology: Examples through different landforms and scales

2014

Recent developments made in tri-dimensional photo-reconstruction techniques (3D-PR), such as the use of Structure from Motion (SfM) and MultiView Stereo (MVS) techniques together, have allowed obtaining high resolution 3D point clouds. In order to achieve final point clouds with these techniques, only oblique images from consumer un-calibrated and non-metric cameras are needed. Here, these techniques are used in order to measure, monitor and quantify geomorphological features and processes. Three different applications through a range of scales and landforms are presented here. Firstly, five small gully headcuts located in a small catchment in SW Spain were monitored with the aim of estimat…

A thermal inertia model for soil water content retrieval using thermal and multispectral images

2010

Soil moisture is difficult to quantify because of its high spatial variability. Consequently, great efforts have been undertaken by the research community to develop practical remote sensing approaches to estimate the spatial distribution of surface soil moisture over large areas and with high spatial detail. Many methodologies have been developed using remote sensing data acquiring information in different parts of the electromagnetic spectrum. Conventional field measurement techniques (including gravimetric and time-domain reflectometry) are point-based, involve on-site operators, are time expensive and, in any case, do not provide exhaustive information on the spatial distribution of soi…