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The Impact of wildland fires on calcareous Mediterranean pedosystems (Sardinia, Italy): an integrated multiple approach

Capra, Gian Franco and Tidu, Simona and Lovreglio, Raffaella and Certini, Giacomo and Salis, Michele and Bacciu, Valentina and Ganga, Antonio and Filzmoser, Peter (2018) The Impact of wildland fires on calcareous Mediterranean pedosystems (Sardinia, Italy): an integrated multiple approach. Science of The Total Environment, Vol. 624 , p. 1152-1162. ISSN 0048-9697. Article.

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DOI: 10.1016/j.scitotenv.2017.12.099

Abstract

Sardinia (Italy), the second largest island of the Mediterranean Sea, is a fire-prone land. Most Sardinian environments over time were shaped by fire, but some of them are too intrinsically fragile to withstand the currently increasing fire frequency. Calcareous pedoenvironments represent a significant part of Mediterranean areas, and require important efforts to prevent long-lasting degradation from fire. The aim of this study was to assess through an integrated multiple approach the impact of a single and highly severe wildland fire on limestone-derived soils. For this purpose, we selected two recently burned sites, Sant'Antioco and Laconi. Soil was sampled from 80 points on a 100 × 100 m grid – 40 in the burned area and 40 in unburned one – and analyzed for particle size fractions, pH, electrical conductivity, organic carbon, total N, total P, and water repellency (WR). Fire behavior (surface rate of spread (ROS), fireline intensity (FLI), flame length (FL)) was simulated by BehavePlus 5.0.5 software. Comparisons between burned and unburned areas were done through ANOVA as well as deterministic and stochastic interpolation techniques; multiple correlations among parameters were evaluated by principal factor analysis (PFA) and differences/similarities between areas by principal component analysis (PCA). In both sites, fires were characterized by high severity and determined significant changes to some soil properties. The PFA confirmed the key ecological role played by fire in both sites, with the variability of a four-modeled components mainly explained by fire parameters, although the induced changes on soils were mainly site-specific. The PCA revealed the presence of two main “driving factors”: slope (in Sant'Antioco), which increased the magnitude of ROS and FLI; and soil properties (in Laconi), which mostly affected FL. In both sites, such factors played a direct role in differentiating fire behavior and sites, while they played an indirect role in determining some effects on soil.

Item Type:Article
ID Code:11913
Status:Published
Refereed:Yes
Uncontrolled Keywords:Calcareous soils, BehavePlus, multivariate statistics, driving factors, slope, water repellency
Subjects:Area 07 - Scienze agrarie e veterinarie > AGR/14 Pedologia
Area 07 - Scienze agrarie e veterinarie > AGR/05 Assestamento forestale e selvicoltura
Divisions:002 Altri enti e centri di ricerca del Nord Sardegna > CNR-Consiglio Nazionale delle Ricerche > Istituto di biometeorologia, Sassari
002 Altri enti e centri di ricerca del Nord Sardegna > CMCC-EuroMediterranean Center for Climate Change, Sassari
001 Università di Sassari > 01-a Nuovi Dipartimenti dal 2012 > Architettura, Design e Urbanistica
001 Università di Sassari > 02 Centri > Centro interdipartimentale Nucleo di ricerca sulla desertificazione
001 Università di Sassari > 01-a Nuovi Dipartimenti dal 2012 > Agraria
Publisher:Elsevier
ISSN:0048-9697
Deposited On:06 Feb 2018 11:46

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