Ash-soil interface: Mineralogical composition and physical structure

Brook, Anna; Wittenberg, Lea

doi:10.1016/j.scitotenv.2016.02.123

Cited by 19 publications

(13 citation statements)

References 55 publications

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“…All heated samples were structured in a clear layering pattern, revealing visually recognizable laminas of the ash and the topsoil, similar to the results obtained by Brook and Wittenberg (). The laboratory experimental results indicate differences between the ashes produced from the different OM.…”

Section: Resultssupporting

confidence: 86%

“…The first spectral ratio index was calculated between pyrogenic calcium assigned to calcite (CaCO 3 ) and pyrogenic magnesium assigned to dolomite (CaMg(CO 3 ) 2 ). This index was first proposed by Marion, Moreno, and Oechel (1991) and further adapted by Úbeda et al (2009) andWittenberg (2016). This index evaluates the effects of heating temperature on severity and ash characteristics.…”

Section: Spectral Indices and Analysismentioning

confidence: 99%

“…Therefore, the fire‐generated ash (viz., ash) generally consists of charred organic material, charcoal, and inorganic mineral of different shapes and sizes, wide ranging from fine‐size powder‐like to coarse‐sized grains (Lu et al, ). Previous analyses have already illustrated the diverse structure of this matter (Brook & Wittenberg, ; Etiegni & Campbell, ), yet the existing understanding of fire ash is inconsistent and insufficient (Bodí et al, ).…”

Section: Introductionmentioning

confidence: 99%

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Structural heterogeneity of vegetation fire ash

et al. 2018

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Any wildfire generates ash, the solid residue derived from burning biomass. Vegetation fire ash consists of charred organic material, charcoal, and inorganic mineral substances. Recent studies identified ash deposits as a dual system: soil and ash strata. The addition of ash to the soil profile alters soil properties and dynamics. A thorough analysis of ash–soil profile reveals a structural appearance of thin laminas. The laminas differ in a variety of physical properties and mineral composition. This research aims at assessing the unique properties of ash–soil profiles by performing an infrared spectroscopic study and statistical analysis. For that purpose, several laboratory experiments were conducted. The paper presents semiquantitative results of spectral analysis calculated by 4 statistical methods. The results indicate a well‐established laminar structure of the ash and evaluate the characteristics of each lamina. The proposed methodology was examined under real‐world conditions; a field experiment of 2‐m2 parcel with in situ O horizon was flamed and burned out. The field samples illustrated the formation of microlaminas, which proved to be similar to the laboratory samples. This detailed approach may promote a better understanding of the complex nature to the ash, the ash–soil interactions and its effect on the edaphic ecosystem.

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Section: Resultssupporting

confidence: 86%

Section: Spectral Indices and Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Structural heterogeneity of vegetation fire ash

et al. 2018

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“…Fire is considered a soil forming factor (Certini, 2014) and its impacts on soil properties depend on the type of soil and vegetation affected, fire severity, type of ash produced, topography, aspect, and meteorological characteristics during and after the fire (Bodí et al, 2014;Brook and Wittenberg, 2016;Campos et al, 2016;Mataix-Solera et al, 2009;Unzue-Belmonte et al, 2016). One of the most widely reported impacts of heating and fire on soils is pH change (Blank et al, 2003;Marcos et al, 2007), which it is attributed to the denaturation of soil organic acids (Certini, 2005), the formation of oxides (Giovannini et al, 1988), and incorporation of ash into the soil profile (Pereira et al, 2014b;Raison and McGarity, 1980).…”

Section: Introductionmentioning

confidence: 99%

Short-term low-severity spring grassland fire impacts on soil extractable elements and soil ratios in Lithuania

Pereira

Cerdà

Martin³

et al. 2017

Science of The Total Environment

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Spring grassland fires are common in boreal areas as a consequence of slash and burn agriculture used to remove dry grass to increase soil nutrient properties and crop production. However, few works have investigated fire impacts on these grassland ecosystems, especially in the immediate period after the fire. The objective of this work was to study the short-term impacts of a spring grassland fire in Lithuania. Four days after the fire we established a 400m sampling grid within the burned area and in an adjacent unburned area with the same topographical, hydrological and pedological characteristics. We collected topsoil samples immediately after the fire (0months), 2, 5, 7 and 9months after the fire. We analysed soil pH, electrical conductivity (EC), major nutrients including calcium (Ca), magnesium (Mg), sodium (Na), and potassium (K), and the minor elements aluminium (Al), manganese (Mn), iron (Fe) and zinc (Zn). We also calculated the soil Na and K adsorption ratio (SPAR), Ca:Mg and Ca:Al. The results showed that this low-severity grassland fire significantly decreased soil pH, Al, and Mn but increased EC, Ca, Mg, and K,. There was no effect on Na, Fe, and Zn. There was a decrease of EC, Ca, Mg, and Na from 0months after the fire until 7months after the fire, with an increase during the last sampling period. Fire did not significantly affect SPAR. Ca:Mg decreased significantly immediately after the fire, but not to critical levels. Ca:Al increased after the fire, reducing the potential effects of Al on plants. Overall, fire impacts were mainly limited to the immediate period after the fire.

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“…1 and 2), we observed that the ash covers the surface. Ash has a kind of "sealing effect" reducing the infiltration, accelerating the splashing effect and increase the surface runoff (Brook and Wittenberg, 2016). It can be assumed that future frost and thaw cycles will further weaken the rock or that the loose slope debris in the upper rockwall area will be remobilised by heavy precipitation events.…”

Section: Changes In Soil and Rockmass Structurementioning

confidence: 99%

Brief communication: Post-wildfire rockfall risk in the Eastern Alps

Melzner¹,

Shtober‐Zisu²,

Katz³

et al. 2019

Preprint

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In the Eastern Alps no previous research focused on the impact of wildfires on the occurrence of rockfalls. The investigation 10 of wildfires and post-wildfire rockfalls gains new importance with respect to changes in weather extremes and rapid social developments such as population growths and tourism. The present work describes a wildfire that occurred in August 2018 in a famous world-heritage site in Austria. Indicators of fire severity and rockfall occurrence during and after the fire are described.

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Ash-soil interface: Mineralogical composition and physical structure

Cited by 19 publications

References 55 publications

Structural heterogeneity of vegetation fire ash

Structural heterogeneity of vegetation fire ash

Short-term low-severity spring grassland fire impacts on soil extractable elements and soil ratios in Lithuania

Brief communication: Post-wildfire rockfall risk in the Eastern Alps

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