Abstract
In 2012, eighteen years after a forest fire that took place in 1994 and burned a Pinus pinaster plantation, the soil aggregate stability is analysed and compared with aggregates of an unburned control area. The burned area was divided into three zones just after the fire, low, medium and high intensity fire, depending on the intensity at which burned each of the three zones. The results of the sampling in 2012, were compared to the analysis of the soil aggregates in 1994 and 1995. The results show that after eighteen years the aggregates of the burned zones are less stable based on two analytical methods, and the differences between burned areas not significant. The fact that the soil of the control zone has more organic matter and concentration of chemical elements like, calcium, magnesium and iron, seems to be the determining factor of greater stability of surface aggregates in the control zone.
Highlights
Palabras clave: efectos del fuego a corto y largo término, métodos TDI y CND, macizo de Cadiretes, Girona
The burned area was divided into three zones just after the fire, low, medium and high intensity fire, depending on the intensity at which burned each of the three zones
The results show that after eighteen years the aggregates of the burned zones are less stable based on two analytical methods, and the differences between burned areas are not significant
Summary
Los agregados del suelo son agrupaciones de partículas tanto minerales como orgánicas. Para el análisis de los datos adquiridos a partir de este procedimiento se puede realizar un estudio de la distribución del tamaño de los agregados residuales (en las 7 categorías obtenidas a partir de los 6 tamices utilizados) y el cálculo por interpolación del diámetro mediano de los agregados (D50), que se toma como el parámetro guía para determinar su estabilidad (Salvador Sanchís et al, 2008). Hay poca bibliografía sobre efectos de los incendios forestales a largo término, así que creemos que este artículo puede ser una contribución más a conocer el estado del suelo en zonas quemadas y en las cuales no se ha realizado ningún tipo de gestión postincendio de aprovechamiento de la madera ni de revegetación o reforestación. Los resultados se comparan con la estabilidad estructural de un suelo control
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