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• W3036242458 endingPage "140363" @default.
• W3036242458 startingPage "140363" @default.
• W3036242458 abstract "Wildfires are a major problem in Mediterranean forest ecosystems, affecting the same area year after year. Their severity is increasing, partly due to climate change and hence, every now and then, virulent fires of high severity spread ravage this region. The aim of this study was to evaluate the influence of fire regime (recurrence, severity) in soil microbial community structure analyzing the phospholipid fatty acid (PLFA) and the microbial functional diversity assessing the level physiological profiling technique (CLPP). Samples of a soil affected by a high severities wildfire and a soil affected by a low severity experimental fire were heated under laboratory conditions at different temperatures to simulate different fire severity. To simulate fire recurrence, the heating treatment was repeated after one month of incubation. The fire severity was estimated as the amount of heat supplied to samples by degree-hour methodology. A marked impact of fire regime on soil microorganisms was detected; the microbial community response varied depending on previous history of fire and the magnitude of changes in PLFA pattern and CLPP, was related to the amount of heat supplied to the samples. Wildfires had a greater impact on microbial community structure than subsequent soil heating in the laboratory. The total biomass and the biomass of specific groups of microorganisms decreased notably as a consequence of wildfire and minor changes were detected due to the experimental fire and soil heating under laboratory conditions. The results clearly showed the usefulness of PLFA pattern to study the effect of fire regimes and associated direct and indirect changes in soil microorganisms and in soil quality. The data also indicated that the degree-hour methodology rather than maximum temperature is adequate to simulate fire severity and evaluate the impact of thermal shock on soil ecosystems. • Fire regime impact on forest soils was examined in a complex soil heating experiment. • Microbial composition was analyzed by CLPP and PLFA methods in heated soil samples. • Fire regimen (severity, occurrence) provoked marked changes in microbial composition. • A close relationship was observed between PLFA data and degree-hours (fire severity). • The degree-hours rather than maximum temperature were more adequate to evaluate the fire impacts." @default.
• W3036242458 created "2020-06-25" @default.
• W3036242458 creator A5000420021 @default.
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• W3036242458 creator A5051694540 @default.
• W3036242458 creator A5087353750 @default.
• W3036242458 creator A5090177755 @default.
• W3036242458 date "2020-11-01" @default.
• W3036242458 modified "2023-10-16" @default.
• W3036242458 title "Key factors controlling microbial community responses after a fire: Importance of severity and recurrence" @default.
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