RT info:eu-repo/semantics/article
T1 Do Fire Regime Attributes Affect Soil Biochemical Properties in the Same Way under Different Environmental Conditions?
A1 Fernández García, Víctor
A1 Marcos Porras, Elena María
A1 Reyes Ferreira, Otilia
A1 Calvo Galván, María Leonor
A2 Ecologia
K1 Ecología. Medio ambiente
K1 Ingeniería forestal
K1 Burn severity
K1 Fire frequency
K1 Enzymatic activities
K1 Microbial biomass
K1 Environmental conditions
K1 2417.13 Ecología Vegetal
K1 2511.01 Bioquímica de Suelos
K1 3106.99 Otras (Incendios forestales)
K1 2511.09 Microbiología de Suelos
K1 3106.01 Conservación
AB [EN] Global change is altering fire frequency and severity in many regions across the world. In this work, we studied the impact of different frequency and severity regimes on the soil biochemical properties in burned areas with different environmental conditions. We selected three sites dominated by pine ecosystems along a Mediterranean-Transition-Oceanic climatic gradient, where we determined the fire frequency, and severity of the last wildfire. Four years after the last wildfire, we established 184 4 m2 plots. In each plot, we collected a composed soil sample from a 3 cm depth, and measured several ecological variables potentially affected by the fire frequency and severity (cover of bare soil, cover of fine and coarse plant debris, cover of vegetation, and vegetation height). From each soil sample, we analyzed the enzymatic activities corresponding to the biogeochemical cycles of carbon, nitrogen, and phosphorus (β-glucosidase, urease, and acid-phosphatase, respectively), and the microbial biomass carbon. The results indicated that fire frequency only played a significant role in soil biochemical properties at the Mediterranean and Transition sites. Specifically, we found that increases in frequency contributed to increased urease and phosphatase activities (at the Transition site), as well as microbial biomass carbon (at the Mediterranean and Transition sites). In relation to burn severity, we found opposite patterns when comparing the Mediterranean and Oceanic sites. Specifically, increased severity significantly decreased β-glucosidase, urease, and microbial biomass carbon at the Mediterranean site, whereas at the Oceanic one, severity significantly increased them. Burn severity also decreased microbial biomass carbon at the Transition site. Our results also indicated that, overall, fire frequency determined the studied ecological variables at the Mediterranean and Transition sites, but clear indirect effects on biochemical properties due to changes in ecological variables were not found. This study adds to the knowledge on the impact of shifts in fire regimes on soils in the current context of change
PB MDPI
LK https://hdl.handle.net/10612/20254
UL https://hdl.handle.net/10612/20254
NO Fernández-García, V., Marcos, E., Reyes, O. & Calvo, L. (2020). Do fire regime attributes affect soil biochemical properties in the same way under different environmental conditions? Forests, 11(3) Article e274. https://doi.org/10.3390/F11030274
NO This article belongs to the Special Issue Forest Post-Fire Regeneration
DS BULERIA. Repositorio Institucional de la Universidad de León
RD 26-jun-2024