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The effect of two post-fire stabilization techniques (Seeding and Mulching) on trace elements (Al, B, Co, Cu,\udFe, Mn, Mo and Zn) losses with eroded sediments was evaluated during 13 months after an experimental fire\udin a steep shrubland of a temperate-humid region (NW Spain). With time, concentration of extractable Mn, Zn\udand Cu in sediments decreased, Fe tended to increase and Al, Co, B and Mo varied without a clear trend. Most\udsediments and trace element losses occurred during the first three months post-fire. Compared with the\udavailable elements in ash+burned topsoil, the fraction lost with sediments was highest for Mo (10-16%),\udintermediate for Mn (4%) and Zn (3%) and low for the rest (0.4-1.2%). Although minor effects of stabilization\udtechniques on element concentrations were found, accumulated mass losses of trace elements decreased 6-12\udtimes in Mulching due to its 10-fold lower soil erosion rate; no significant changes were found in Seeding.\udSediment nutrient losses are probably more important than those published for smoke, leaching or\udvolatilization. Our results suggest that the Zn and Cu enrichment in sediments from the first erosion events\udincrease the risk of downslope water and soil contamination. In conclusion, soil stabilization techniques are\uduseful to prevent post-fire ecosystem damage.Peer reviewe

Effects of post-fire soil stabilisation techniques on trace elements lost by erosion