title: Long-term dynamics of soil chemical properties after a prescribed fire in a Mediterranean forest (Montgrí Massif, Catalonia, Spain).
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 0-5cm 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, some chemical 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+and Mg2+levels had fallen one year after the fire, but levels were 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.
authors: GRAM (Grup de Recerca Mediterrània), Department of Physical Geography, University of Barcelona, Montalegre, 6, 08001 Barcelona, Spain. Electronic address: meritxellalpu@gmail.com.
authors: M
authors: M
authors: Alcañiz
authors: Postdoctoral Fellowship Xunta de Galicia, Dept. Applied Economy, Universidad de Santiago de Compostela, Spain.
authors: L
authors: L
authors: Outeiro
authors: GRAM (Grup de Recerca Mediterrània), Department of Physical Geography, University of Barcelona, Montalegre, 6, 08001 Barcelona, Spain.
authors: M
authors: M
authors: Francos
authors: GRAM (Grup de Recerca Mediterrània), Department of Physical Geography, University of Barcelona, Montalegre, 6, 08001 Barcelona, Spain; Unitat de Xarxes de Control, Departament d'Infraestructures de Control i Regulació, Agència Catalana de l'Aigua. C/Provença 204-206, 08036 Barcelona, Spain.
authors: J
authors: J
authors: Farguell
authors: GRAM (Grup de Recerca Mediterrània), Department of Physical Geography, University of Barcelona, Montalegre, 6, 08001 Barcelona, Spain.
authors: X
authors: X
authors: Úbeda
keywords: Fire ecology; Forest fires; Forest management; Quercus coccifera; Soil recovery