Search results for "FOREST"
showing 10 items of 3780 documents
Phytoseiid mites associated with forest trees in two "Natura 2000" locations: S.Adrian woods (Sicily) and Fraktò virgin forest (Greece).
2009
Dinamica del C labile in suoli forestali simulando l'impatto da incendio ed il successivo spegnimento con acqua marina
2009
Obiettivo del presente lavoro è stato quello di valutare, in diversi suoli forestali ed a condizioni controllate di laboratorio, l’impatto del riscaldamento da incendio e del successivo spegnimento con acqua marina sulla dinamica del C estraibile e sulla cinetica di respirazione. A tal fine, in un’area pedoclimatica omogenea, sono stati selezionati 4 suoli sotto diverse essenze forestali: Eucalyptus camaldulensis (EC), E. occidentalis (EO), Pinus halepensis (PH) e Cupressus sempervirens (CS). I campioni di suolo sono stati riscaldati a 25 (controllo), 160 e 380 °C per 30 minuti ed umidificati al 50% della capacità idrica di campo con acqua marina o distillata (controllo), ottenendo così 6 d…
APPROCCIO METODOLOGICO PER LA VALUTAZIONE DELLA QUALITÀ DEI SUOLI NELLA R.N.O. MONTE GALLO (PA)
2012
Influence of biochar on the physical, chemical and retention properties of an amended sandy soil
2017
Soil porosity plays an important role in soil-water retention and water availability to crops, potentially affecting both agricultural practices and environmental sustainability. The pore structure controls fluid flow and transport through the soil, as well as the relationship between the properties of individual minerals and plants. Moreover, the anthropogenic pressure on soil properties has produced numerous sites with extensive desertification process close to residential areas. Biochar (biologically derived charcoal) is produced by pyrolysis of biomasses under low oxygen conditions, and it can be applied for recycling organic waste in soils and increase soil fertility, improving soil st…
Dynamics of carbon pools in a soil covered with different forest tree species after controlled heating and wetting
2012
Fire-induced soil heating deeply affects soil organic C pools and their dynamics. The objective of this study was to investigate, in a soil covered with different forest tree species (Eucalyptus camaldulensis, E. occidentalis, Pinus halepensis, and Cupressus sempervirens), the effect of controlled heating on C pools and C mineralization dynamics. Soil samples were heated under controlled condition in laboratory (160 and 380°C) and then wetted with distilled or sea water to simulate the extinction of wildfires. Soil organic C pools react to heating in different way depending on forest tree species. Total organic C was almost halved following the heating of soils at 380°C. Soil covered with P…
VARIABILITÀ SPAZIALE DELLA CONDUCIBILITÀ ELETTRICA SU SUOLI FORESTALI EVOLVENTI SULLA SERIE GESSOSO-SOLFIFERA
2004
In Sicilia, una superficie di circa 250.000 ettari, è interessata da suoli affetti da salinità. In laboratorio, la salinità del suolo può essere stimata, indirettamente, determinando la conducibilità elettrica (CE) dell’estratto di sospensioni suolo/acqua, mentre per la sua stima diretta in campo si sta diffondendo l’uso dei sensori ad induzione elettromagnetica. Scopo del lavoro è stata la valutazione della variabilità spaziale della conducibilità elettrica di suoli affetti da salinità, con un sensore elettromagnetico. L’area di studio ricade nella Sicilia centrale, nel “Complesso Boscato Mustigarufi” i cui suoli presentano un diverso contenuto di sali. Le misure, effettuate in 329 punti s…
Source of calcium for pedogenic CaCO3 formation in benchmark soils of a Mediterranean semiarid environment
2004
Calcic and petrocalcic horizons (Bk and Bkm, respectively) commonly occur in soils of arid and semiarid regions. Studies carried out to investigate the source of calcium in CaCO3 formation have shown that dust and parent materials represent the main sources. The aim of this study was to investigate if gypsum may be a source of calcium for calcium carbonate formation and, eventually, to quantify it. Five soil pedons, developing on “Serie Gessoso- Solfifera”, were selected in a very representative forest Mediterranean ecosystem in Sicily (I). Pedons were opened, described in field and sampled according to the sequence of genetic horizons. Soil samples were analyzed to investigate 87/86Sr rati…
Soil and pedomesofauna relationships under different forests on a western slope of Etna Volcano
2015
Although the pedofauna influences the processes of pedogenesis and has an important role in the main functional properties of the soil, it has rarely been used as a key-element in defining soil quality. As has been stressed, this is due to the fact that the utility of pedofauna as a soil quality indicator is a function of the definition of soil quality which, in turn, depends on different functions, both biotic and abiotic, performed by the soil. If we consider the biological functions of vegetal, animal and microbiotic activity, the usefulness of the pedofauna, as a diagnostic element of soil quality, reaches its maximum since it is one of the indicators of the biodiversity. Previous work …
Application of SNP reduction approaches and random forest for the identification of population informative markers in cosmopolitan and local cattle b…
2017
In livestock, single nucleotide polymorphism genotyping arrays have been used to differentiate breeds and populations for several downstream applications, including breed allocation of individuals, breeds of origin of crossbred animals, authentication of mono breed products, comparative analyses of selection signatures among several other uses. We already tested a combination of principal component analysis (PCA), used as preselection method, and random forest (RF) used as classification method to assign cosmopolitan Italian breeds with no or very low error rate. In this work, we increased the number of breeds and approaches, to have a more comprehensive view of the strategies available and…
Human activities trigger change in marine landscape
2018
Biodiversity is undergoing rapid and worrying changes, partially driven by anthropogenic activities. Human impacts and climate change (e.g. increasing temperature and ocean acidification), which act at different spatial scale, represent the most serious threats to biodiversity and ecosystem structure and function. In this overview, the effects of anthropogenic pressures on unique and valuable Mediterranean systems, such as Cystoseira sp. pl. forest and Posidonia oceanica meadows, are examined. These complex systems, characterized by a high associated biodiversity, are regularly exposed to natural and anthropogenic pressures. Due to the central role they have for several important ecological…