Wildfire effects on soil properties in fire-prone pine ecosystems: Indicators of burn severity legacy over the medium term after fire

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Wildfire effects on soil properties in fire-prone pine ecosystems: Indicators of burn severity legacy over the medium term after fire

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Título: Wildfire effects on soil properties in fire-prone pine ecosystems: Indicators of burn severity legacy over the medium term after fire
Autor: Fernández-García, Víctor;Miesel, Jessica;Baeza, J.;Marcos Porras, Elena María;Calvo Galván, Leonor
Facultad/Centro: Facultad de Ciencias Biologicas y Ambientales
Area de conocimiento: Ecologia
Resumen: The aim of this study was to determine the effects of burn severity on soil properties (chemical, biochemical and microbiological) in fire-prone pine ecosystems three years after fire. To achieve these goals, we selected two large wildfires that occurred in summer 2012 within the Iberian Peninsula: the Sierra del Teleno wildfire, which burned 119 km2 dominated by Pinus pinaster forests developed over acidic soils, and the Cortes de Pallás wildfire, which burned 297 km2, part of them dominated by Pinus halepensis ecosystems with calcareous soils. We classified the burned areas into low or high burn severity categories using spectral indices. Three years after the wildfires, we distributed 56 field plots proportionally to the extent of each severity category. In each field plot, we collected samples of mineral soil from a depth of 0–3 cm. We analysed soil chemical (pH, electrical conductivity, organic carbon, total nitrogen, available phosphorus) biochemical (β-glucosidase, urease and acid phosphatase enzymatic activities) and microbiological (microbial biomass carbon) properties in each soil sample. The relationship between burn severity and soil properties was analysed by a Permutational Multivariate Analysis of Variance and Generalized Linear Models. The results showed a significant influence of the original ecosystem and of burn severity on the overall soil status over the medium term after fire. Available P content increased with burn severity in the acidic soils of the P. pinaster ecosystem. However, the three enzymatic activities and microbial biomass carbon decreased with burn severity in both types of pine ecosystems. β-glucosidase, urease and microbial biomass carbon showed common patterns in relation to burn severity in the two different Pinus ecosystems (acidic and calcareous soils), and therefore we suggest that they could be potential indicators of the burn severity legacy on soils over the medium term after fire in fire-prone pine Mediterranean forests. Available P and acid phosphatase could be potential indicators in the P. pinaster ecosystem. This study provides useful knowledge for developing hazard reduction and restoration strategies after large wildfires
Descripción física: P. 147-156
Revisión por pares: SI
Editor: Elsevier
Datos: Applied Soil Ecology, 2019, vol. 135
URI: http://hdl.handle.net/10612/9438
Fecha: 2019-03
Tipo: info:eu-repo/semantics/article
Materia: Ecología. Medio ambiente
Palabras clave: Fire severity
Large wildfire
Mediterranean Basin
Pinus pinaster
Pinus halepensis
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