Effects of prescribed burning on soil organic C, aggregate stability and water repellency in a subalpine shrubland: Variations among sieve fractions and depths
Resumen: Soil organic matter, aggregation and water repellency are relevant interrelated soil properties that can be affected by fire. The aim of this work was to analyse the effects of shrub prescribed burning for pasture reclamation on the soil aggregate stability, organic carbon and water repellency of different soil depths and aggregate sizes in a subalpine environment. Soil samples were collected from an area treated by an autumnal low-intensity prescribed fire in the Central Pyrenees (NE-Spain) at 0-1, 1-2, 2-3 and 3-5 cm depths just before and ~1 hour, 6 months and 12 months after burning. Samples were separated as whole soil (<10 mm) and 6 sieve fractions, <0.25, 0.25-0.5, 0.5-1, 1-2, 2-4 and 4-10 mm. We analysed soil organic C (SOC), aggregate stability (AS) and soil water repellency (SWR). In the unburned samples, SOC and SWR were higher in the <0.25 to 2 mm sieve fractions than the 2 to 10 mm sieve fractions. Fire severely and significantly decreased the SOC content in the whole soil and the <0.25 mm fraction at 0-1 cm depth and in the 0.25-0.5 mm fraction at 0-2 cm depth. SWR was reduced by burning mainly at 0-1 cm depth for the whole soil and the <0.25 to 2 mm sieve fractions. Nevertheless, the AS of the 0.25-0.5 mm aggregates increased after fire, while the rest of the sieve fractions remained virtually unaffected. One year after the prescribed burning, SOC slightly increased and SWR recovered in the fire-affected fractions, while the AS for all aggregate sizes and depths showed a considerable decrease. The results suggest that the direct effects of burning are still present one year after burning, and the post-fire situation may pose an increased risk of soil loss. Furthermore, our results indicate that fine soil fractions are more likely to be affected by fire than coarser soil fractions and highly influence the whole soil behaviour.
Idioma: Inglés
DOI: 10.1016/j.catena.2018.03.018
Año: 2018
Publicado en: CATENA 166 (2018), 68-77
ISSN: 0341-8162

Factor impacto JCR: 3.851 (2018)
Categ. JCR: GEOSCIENCES, MULTIDISCIPLINARY rank: 31 / 195 = 0.159 (2018) - Q1 - T1
Categ. JCR: SOIL SCIENCE rank: 6 / 35 = 0.171 (2018) - Q1 - T1
Categ. JCR: WATER RESOURCES rank: 9 / 91 = 0.099 (2018) - Q1 - T1

Factor impacto SCIMAGO: 1.328 - Earth-Surface Processes (Q1)

Financiación: info:eu-repo/grantAgreement/ES/MINECO/BES-2014-068072
Financiación: info:eu-repo/grantAgreement/ES/MINECO/CGL2013-43440-R
Tipo y forma: Article (PrePrint)
Área (Departamento): Área Producción Vegetal (Dpto. CC.Agrar.y Medio Natural)
Área (Departamento): Área Edafología y Quím.Agríco. (Dpto. CC.Agrar.y Medio Natural)

Creative Commons You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. You may not use the material for commercial purposes. If you remix, transform, or build upon the material, you may not distribute the modified material.

Exportado de SIDERAL (2019-11-27-15:48:59)

Este artículo se encuentra en las siguientes colecciones:

 Record created 2019-03-29, last modified 2019-11-27

Rate this document:

Rate this document:
(Not yet reviewed)