126919 20241125101135.0 doi 10.1016/j.scitotenv.2023.163994 sideral 134367 ART-2023-134367 eng Alfaro-Leranoz, A. Universidad de Zaragoza (orcid)0000-0003-0004-4196 Long-term evolution of shrub prescribed burning effects on topsoil organic matter and biological activity in the Central Pyrenees (NE-Spain) 2023 Access copy available to the general public Unrestricted Since the last half of the 20th Century, scrubs have been invading subclimatic grasslands in the montane and subalpine stages of Spain due to the decrease of the grazing activity. This shrub encroachment reduces biodiversity and the ecopastoral value of the region and leads to the accumulation of woody fuel, which represents a high fire risk. To control the encroachment, prescribed burnings are performed but their effects on soils over the years are still undetermined. This study aims to research about the long-term effects of a prescribed burn of Echinospartum horridum (Vahl) Roth. on topsoil organic matter and biological activity. Soil sampling was carried out in Tella-Sin (Central Pyrenees, Aragón, Spain) and four treatments were selected: unburned (UB), immediately burned (B0), burned 6 years before (B6, mid-term) and burned 10 years before (B10, long-term). Among the obtained results, an immediately after burning decrease on β-D-glucosidase activity (GLU) was found, which did not recover over time. Other properties did not have an immediate reduction but did so over time: total soil organic carbon (SOC), labile carbon (DOC), total nitrogen (TN), basal soil respiration (bSR). And others were not affected at all: microbial biomass carbon (MBC), and the microbial metabolic quotient (qCO2). Moreover, the normalized soil respiration (nSR) increased with the time, which implies an acceleration of the potential mineralization of soil organic carbon. In short, although the elimination of the dense shrubs by fire has not entailed major immediate soil modifications, which would be typical of a low severity prescribed burn, several mid- and long-term effects in the C cycle have been observed. Future studies will have to discern what is the main cause of these modifications (soil microbial composition, edaphoclimatic changes, lack of soil cover and soil loss, soil fertility, etc.). info:eu-repo/semantics/openAccess by-nc http://creativecommons.org/licenses/by-nc/3.0/es/ 8.2 2023 ENVIRONMENTAL SCIENCES 31 / 358 = 0.087 2023 Q1 T1 1.998 2023 Environmental Chemistry 2023 Q1 Waste Management and Disposal 2023 Q1 Pollution 2023 Q1 Environmental Engineering 2023 Q1 17.6 2023 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Badia-Villas, D. Universidad de Zaragoza (orcid)0000-0002-1006-5030 Marti-Dalmau, C. Universidad de Zaragoza (orcid)0000-0003-0630-1181 Emran, M. Conte-Domínguez, A. P. Ortiz-Perpiña, O. Universidad de Zaragoza (orcid)0000-0003-3516-5756 5011 705 Universidad de Zaragoza Dpto. CC.Agrar.y Medio Natural Área Producción Vegetal 5011 240 Universidad de Zaragoza Dpto. CC.Agrar.y Medio Natural Área Edafología y Quím.Agríco. 888 (2023), 163994 [10 pp.] Sci. total environ. SCIENCE OF THE TOTAL ENVIRONMENT 0048-9697 1915700 http://zaguan.unizar.es/record/126919/files/texto_completo.pdf Versión publicada 2256971 http://zaguan.unizar.es/record/126919/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:126919 articulos driver 2024-11-22-12:00:21 ARTICLE