Short-term nitrogen losses by overland flow in a recently burnt forest area in north-central Portugal: A study at micro-plot scale

The Science of the Total Environment
R V FerreiraJ J Keizer

Abstract

Over the past decades, wildfires have affected extensive areas of the Mediterranean region with negative impacts on the environment. Most of the studies on fire-affected areas have focused on sediment losses by overland flow, whereas few have addressed post-fire nutrient export. The present study aimed to address this research gap by assessing nitrogen (nitrate and total nitrogen) losses by overland flow in a recently burnt area in north-central Portugal. To this end, three burnt slopes were selected for their contrasting forest types (eucalypt vs. pine) and parent materials (granite vs. schist). The selected study sites were a eucalypt site on granite (BEG), a eucalypt site on schist (BES) and a maritime pine site on schist (BPS). Overland flow samples were collected during the first six months after the wildfire on a 1- to 2-weekly basis, after which this study had to be cancelled due to bench terracing of some of the sites. A peak in total nitrogen concentrations was observed in burnt areas immediately after the first post-fire rainfall event as a response to the erosion of the N-enriched ash layer. After this initial peak, smaller peaks were observed throughout the study period, mainly as a response to overland flow and/or ...Continue Reading

References

Jan 12, 1999·Journal of Shoulder and Elbow Surgery·J E CarpenterL J Soslowsky
Jun 12, 2003·The Science of the Total Environment·Giovanni PardiniGemma Dunjó
Feb 3, 2005·Oecologia·Giacomo Certini
Sep 24, 2013·The Science of the Total Environment·Sergio Alegre PratsJan Jacob Keizer
Apr 22, 2015·The Science of the Total Environment·A I MachadoJ J Keizer

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Citations

Feb 16, 2016·The Science of the Total Environment·Isabel CamposPatrícia Pereira
Jul 3, 2016·The Science of the Total Environment·Paulo PereiraDeborah Martin

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