Efectos de los incendios forestales en las propiedades edáficas

In book: Incendios Forestales, Suelos y Erosión Hídrica, Publisher: Caja Mediterráneo CEMACAM Font Roja-Alcoi, pp.5-40
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    • "The impact of fire on the total soil N pool is unclear; thus, while some studies report an increase (Covington and Sackett, 1992; Kovacic et al., 1986; Schoch and Binkley, 1986), others report a decrease (Raison et al., 1987) or no change (Moghaddas and Stephens, 2007). However, in medium and high severity fires we would expect to find a reduction, given a N volatilization temperature of 200 °C (Solera and Guerrero, 2007 ). Some studies conclude that prescribed fires (usually low intensity) are often beneficial because the low temperatures reached cause only minimal N volatilization (Úbeda et al., 2005; Afif and Oliveira, 2006); a gain in inorganic N, as a result of organic N oxidation (Mataix-Solera, 1999); and, the deposition of ashes in multiple forms that can be easily incorporated in soils and rapidly mobilized by plants (Certini, 2005). "
    Full-text · Dataset · Apr 2016
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    • "The impact of fire on the total soil N pool is unclear; thus, while some studies report an increase (Covington and Sackett, 1992; Kovacic et al., 1986; Schoch and Binkley, 1986), others report a decrease (Raison et al., 1987) or no change (Moghaddas and Stephens, 2007). However, in medium and high severity fires we would expect to find a reduction, given a N volatilization temperature of 200 °C (Solera and Guerrero, 2007 ). Some studies conclude that prescribed fires (usually low intensity) are often beneficial because the low temperatures reached cause only minimal N volatilization (Úbeda et al., 2005; Afif and Oliveira, 2006); a gain in inorganic N, as a result of organic N oxidation (Mataix-Solera, 1999); and, the deposition of ashes in multiple forms that can be easily incorporated in soils and rapidly mobilized by plants (Certini, 2005). "
    [Show abstract] [Hide abstract] ABSTRACT: This study examines the effects of a prescribed fire on soil chemical properties in the Montgrí Massif (Girona, Spain). The prescribed forest fire was conducted in 2006 to reduce understory vegetation and so prevent potential severe wildfires. Soil was sampled at a depth of 0–5 cm at 42 sampling points on four separate occasions: prior to the event, immediately after, one year after and nine years after. The parameters studied were pH, electrical conductivity (EC), total carbon (C), total nitrogen (N), available phosphorus (P), potassium (K+), calcium (Ca2+) and magnesium (Mg2+). All parameters (except pH) increased significantly immediately after the fire. One year after burning, somechemical parameters – namely, EC, available P and K+ – had returned to their initial, or even lower, values;while others – pH and total C – continued to rise. Total N, Ca2+ andMg2+ levels had fallen one year after the fire, but levelswere still higher than those prior to the event. Nine years after the fire, pH, total C, total N and available P are significantly lower than pre-fire values and nutrients concentrations are now higher than at the outset but without statistical significance. The soil system, therefore, is still far from being recovered nine years later.
    Full-text · Article · Feb 2016 · Science of The Total Environment
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    • "It has been evaluated very little survival of fungi and bacteria in different environments, although it is known that fungi are more resistant to office@multidisciplinarywulfenia.org temperature change than bacteria (Barcenas-Moreno et al, 2011 ; Moreno and Baath, 2009); however, it has been found strong activity after the fire (Bodí et al, 2012). The apparent biological vacuum that remains after a fire is fleeting, because a high biological activity is frequently observed after the first rains (Mataix-Solera and Guerrero, 2007). In addition, there are plant species that have adaptations designed to resist fire, some of them have even developed reproductive mechanisms such as rhizomes to sprout. "
    Full-text · Dataset · Feb 2015
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