RT info:eu-repo/semantics/article
T1 Changes in soil N and P availability in a Pinus canariensis fire chronosequence
A1 Durán, Jorge
A1 Rodríguez, Alexandra
A1 Fernández-Palacios, José María
A1 Gallardo, Antonio
K1 Wildfires
K1 Nutrient availability
K1 Disponibilidad de nutrientes
K1 Incendios forestales
AB Fire induces changes in ecosystem nutrient regimes and can cause major losses of N and P. Much has beenwritten about the effect of fire on nutrient availability in soil;most studies have been concerned with theshort-term effects of shock. The primary objective of our study was to discover the effect of forest fires onlong-term N and P availability, for which we used the ion exchange membrane method in achronosequence of forest fires (1987, 1990, 1994, 1998, 2000 and 2005). The study was conducted on theisland of La Palma (Canary Islands, Spain) in October 2006. We hypothesized that a rapid increase innutrient availability would occur after the fire, followed by a reduction due to erosion and leaching, andthen gradual recovery and an eventual return to initial levels. NH4-N, NO3-N and mineral-N availabilitypeaked significantly 1 year after the fire. However, 5 years after the fire the N levels were similar to thosefound on unburned land. P availability decreased significantly a year after the fire, but graduallyrecovered over time. The N and P availability ratio increased significantly after the fire, falling during thechronosequence, with the lowest levels found on the unburned land. These results confirm that fireproduces (a) a rapid and short-term increase in N availability, without a long-term decline, and (b) a longtermreduction in P availability, which tends to recover over time after the fire.
PB Elsevier
SN 0378-1127
YR 2008
FD 2008
LK http://riull.ull.es/xmlui/handle/915/16430
UL http://riull.ull.es/xmlui/handle/915/16430
LA en
DS Repositorio institucional de la Universidad de La Laguna
RD 26-dic-2024