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How long lasts soil loss after repeated fires in a mediterranean shrubland?
|Authors:||Gimeno-García, Eugenia ; Campo, Julián ; González-Pelayo, Óscar ; Andreu Pérez, V. ; Rubio, José Luis|
|Publisher:||European Confederation of Soil Science Societies|
|Abstract:||One of the primary consequences of forest fires in Mediterranean ecosystems is the rapid and significant increases in runoff and sediment yield, due to the coupled effect of vegetation destruction and changes in soil properties. The impacts of forest fires on water erosion include greater peak flows and soil loss until the recovery of a certain level of vegetation cover. In Mediterranean ecosystems, the first autumn-winter period following a forest fire in summer is the most vulnerable period to water erosion. Afterwards, runoff and erosion rates generally decrease rapidly. This work studies the effect of recurrent fires with different severities on sediment yields, through sixteen years (from 1995 to 2011), to evaluate the durations of the windows of disturbance. The study has been made at La Concordia Experimental Station (Valencia, Spain), which includes nine erosion plots (20 m x 4 m). In 1995, experimental fires were carried out with high and moderate severities (three plots each treatment). Fires were repeated in 2003 on the same plots, but they severities were low (in the six plots). In both experimental fires, the remainder three plots were left unburned. Results show that the effect of repeated fires on soil loss rates are related to a combination of fire severity, climatic conditions, local soil properties and rates of vegetation regeneration. Whereas after 1995 fires, the window of disturbance lasts two years, following the repeated fires this period lengthened for three years.|
|Description:||Poster presentado en EUROSOIL 2012 celebrado en Bari (Italia) del 2 al 6 de julio de 2012|
|Appears in Collections:||(CIDE) Comunicaciones congresos|