title: Impact of an intense rainfall event on soil properties following a wildfire in a Mediterranean environment (North-East Spain).
abstract: Intense rainfall events after severe wildfires can have an impact on soil properties, above all in the Mediterranean environment. This study seeks to examine the immediate impact and the effect after a year of an intense rainfall event on a Mediterranean forest affected by a high severity wildfire. The work analyses the following soil properties: soil aggregate stability, total nitrogen, total carbon, organic and inorganic carbon, the C/N ratio, carbonates, pH, electrical conductivity, extractable calcium, magnesium, sodium, potassium, available phosphorous and the sodium and potassium adsorption ratio (SPAR). We sampled soils in the burned area before, immediately after and one year after the rainfall event. The results showed that the intense rainfall event did not have an immediate impact on soil aggregate stability, but a significant difference was recorded one year after. The intense precipitation did not result in any significant changes in soil total nitrogen, total carbon, inorganic carbon, the C/N ratio and carbonates during the study period. Differences were only registered in soil organic carbon. The soil organic carbon content was significantly higher after the rainfall than in the other sampling dates. The rainfall event did increase soil pH, electrical conductivity, major cations, available phosphorous and the SPAR. One year after the fire, a significant decrease in soil aggregate stability was observed that can be attributed to high SPAR levels and human intervention, while the reduction in extractable elements can be attributed to soil leaching and vegetation consumption. Overall, the intense rainfall event, other post-fire rainfall events and human intervention did not have a detrimental impact on soil properties in all probability owing to the flat plot topography.
authors: GRAM (Grup de Recerca Ambiental Mediterrània), Department of Physical Geography, University of Barcelona, Montalegre, 6. 08001 Barcelona, Spain. Electronic address: marcosfrancos91@gmail.com.
authors: Marcos
authors: M
authors: Francos
authors: Environmental Management Centre, Mykolas Romeris University. Vilnius, Lithuania; Department of Forestry, Michigan State University, East Lansing, MI 48825, USA.
authors: Paulo
authors: P
authors: Pereira
authors: GRAM (Grup de Recerca Ambiental Mediterrània), Department of Physical Geography, University of Barcelona, Montalegre, 6. 08001 Barcelona, Spain.
authors: Meritxell
authors: M
authors: Alcañiz
authors: GEA (Grupo de Edafología Ambiental), Department of Agrochemistry and Environment, Miguel Hernández University, Elche (Alicante), Spain.
authors: Jorge
authors: J
authors: Mataix-Solera
authors: GRAM (Grup de Recerca Ambiental Mediterrània), Department of Physical Geography, University of Barcelona, Montalegre, 6. 08001 Barcelona, Spain.
authors: Xavier
authors: X
authors: Úbeda
keywords: Aggregate stability; C/N ratio; Intense rainfall; Major cations; SPAR; Severe wildfire