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Effects of a low severity prescribed fire on water-soluble elements in ash from a cork oak ( Quercus suber) forest located in the northeast of the Iberian Peninsula

Pereira, Paulo ; Úbeda, Xavier ; Martin, Deborah ; Mataix-Solera, Jorge ; Guerrero, César

Environmental research, 2011-02, Vol.111 (2), p.237-247 [Periódico revisado por pares]

Amsterdam: Elsevier Inc

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Título:
Effects of a low severity prescribed fire on water-soluble elements in ash from a cork oak ( Quercus suber) forest located in the northeast of the Iberian Peninsula
Autor: Pereira, Paulo ; Úbeda, Xavier ; Martin, Deborah ; Mataix-Solera, Jorge ; Guerrero, César
Assuntos: Aluminum ; Ash ; Ashes ; Biological and medical sciences ; Calcium - analysis ; Calcium - chemistry ; Conservation of Natural Resources ; Electric Conductivity ; Environmental Monitoring ; Fires ; Forestry ; Fundamental and applied biological sciences. Psychology ; General forest ecology ; Generalities. Production, biomass. Quality of wood and forest products. General forest ecology ; Heating ; Hydrogen-Ion Concentration ; Iberian Peninsula ; Iron ; Magnesium ; Magnesium - analysis ; Magnesium - chemistry ; Metals, Heavy - analysis ; Metals, Heavy - chemistry ; Oak ; Potassium - analysis ; Potassium - chemistry ; Prescribed fire ; Quercus ; Quercus robur ; Quercus suber ; Silicon Dioxide - analysis ; Silicon Dioxide - chemistry ; Sodium - analysis ; Sodium - chemistry ; Soil (material) ; Soil Pollutants - analysis ; Soil Pollutants - chemistry ; Solubility ; Spain ; Trace Elements - analysis ; Trace Elements - chemistry ; Trees ; Volatilization ; Zinc
É parte de: Environmental research, 2011-02, Vol.111 (2), p.237-247
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
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Descrição: Wildfire is the major disturbance in Mediterranean forests. Prescribed fire can be an alternative to reduce the amount of fuel and hence decrease the wildfire risk. However the effects of prescribed fire must be studied, especially on ash properties, because ash is an important nutrient source for ecosystem recovery. The aim of this study is to determine the effects of a low severity prescribed fire on water-soluble elements in ash including pH, electrical conductivity (EC), calcium (Ca), magnesium (Mg), sodium (Na), potassium (K), aluminum (Al), manganese (Mn), iron (Fe), zinc (Zn), silica (SiO 2) and total sulphur (TS). A prescribed fire was conducted in a cork oak ( Quercus suber) (Q.S) forest located in the northeast part of the Iberian Peninsula. Samples were collected from a flat plot of 40×70 m mainly composed of Q.S and Quercus robur (Q.R) trees. In order to understand the effects of the prescribed fire on the soluble elements in ash, we conducted our data analysis on three data groups: all samples, only Q.S samples and only Q.R samples. All three sample groups exhibited a significant increase in pH, EC ( p<0.001), water-soluble Ca, Mg, Na, SiO 2 and TS and a decrease in water-soluble Mn, Fe and Zn. Differences were identified between oak species for water-soluble K, Al and Fe. In Q.S samples we registered a significant increase in the first two elements p<0.001 and p<0.01, respectively, and a non-significant impact in the third, at p<0.05. In Q.R data we identified a non-significant impact on water-soluble K and Al and a significant decrease in water-soluble Fe ( p<0.05). These differences are probably due to vegetation characteristics and burn severity. The fire induced a higher variability in the ash soluble elements, especially in Q.S samples, that at some points burned with higher severity. The increase of pH, EC, Ca, Mg, Na and K will improve soil fertility, mainly in the study area where soils are acidic. The application of this low severity prescribed fire will improve soil nutrient status without causing soil degradation and thus is considered to be a good management strategy.
Editor: Amsterdam: Elsevier Inc
Idioma: Inglês

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Effects of a low severity prescribed fire on water-soluble elements in ash from a cork oak ( Quercus suber) forest located in the northeast of the Iberian Peninsula

Pereira, Paulo ; Úbeda, Xavier ; Martin, Deborah ; Mataix-Solera, Jorge ; Guerrero, César

Amsterdam: Elsevier Inc

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