Clay minerals, oxyhydroxide formation, element leaching and humus development in volcanic soils

Egli, Markus; Nater, Markus; Mirabella, Aldo; Raimondi, Salvatore; Plötze, Michael; Alioth, Ladina

doi:10.1016/j.geoderma.2007.10.020

Cited by 86 publications

(53 citation statements)

References 52 publications

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“…Thereafter, Table 2 Chemical (total content) and mineralogical composition of the BC, B or B(C) horizon and parent material of the investigated sites (cf. Egli et al, 2008Egli et al, , 2012 Table 3 Major IR absorption bands and assignments (Piccolo and Mirabella, 1985;Senesi et al, 2003;Stevenson, 1994;Tan, 2003 the sample was washed at least four times with 50 mL distilled water. The residue was then dried at 50°C and the mass loss was determined.…”

Section: Dichromate Oxidationmentioning

confidence: 99%

Effects of fire on soil organic matter quality along an altitudinal sequence on Mt. Etna, Sicily

Mastrolonardo

Certini

Krebs

et al. 2013

CATENA

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Soil organic matter (SOM) can directly be affected by wildfires, both in terms of quantity and quality. The combustion is often incomplete, leading to the formation of pyrogenic organic matter (PyOM), a highly heterogeneous material with prevailing aromatic nature. Focusing our attention on PyOM, we investigated an altitudinal soil sequence on Mount Etna, Italy, ranging from 500 m to 1800 m asl, where the fire frequency is assumed to have been higher at lower elevations due to a warmer and drier climate. We evaluated the effect of fire on the chemical and physical characteristics of SOM along the altitudinal sequence. At two sites at a similar altitude but having a different recent fire history, we also examined the effect of fire frequency on SOM. Chemical oxidation of SOM with acid dichromate was used to evaluate the contribution of pyrogenic organic carbon to total SOC. Furthermore, four SOM density fractions were separated and characterised for principal composition, spectroscopic properties by Diffuse Reflectance Infrared Fourier Transform (DRIFT) and Nuclear Magnetic Resonance (NMR), and particle morphology by Scanning Electron Microscopy (SEM). The stocks of C and N as well as the chemical oxidation resistant carbon (COREC) increased with decreasing altitude, hence supporting the hypothesis of higher fire frequency at lower altitudes. The highest C concentrations were found in the density fraction 1.0-1.6 g cm³. At the lower sites, a considerable amount of aromatics, and hence a significant part of COREC, was found in the density fraction 1.0-1.6 g cm³ except for (macro)charcoal that occurs in the lightest fraction (b 1.0 g cm³). The properties of this latter density fraction seemed to be well related to vegetation characteristics. The dichromate oxidation procedure, however, has methodological restrictions. This procedure resulted here to be poorly specific for PyOM in the investigated soils, since it isolated a fraction rich in lipids. The lack of specificity for PyOM is most likely due to the rather low content of aromatics in SOM, although fire frequency was relatively high. Soil organic matter (SOM) can directly be affected by wildfires, both in terms of quantity and quality. The combustion is often incomplete, leading to the formation of pyrogenic organic matter (PyOM), a highly heterogeneous material with prevailing aromatic nature. Focusing our attention on PyOM, we investigated an altitudinal soil sequence on Mount Etna, Italy, ranging from 500 m to 1800 m asl, where the fire frequency is assumed to have been higher at lower elevations due to a warmer and drier climate. We evaluated the effect of fire on the chemical and physical characteristics of SOM along the altitudinal sequence. At two sites at a similar altitude but having a different recent fire history, we also examined the effect of fire frequency on SOM. Chemical oxidation of SOM with acid dichromate was used to evaluate the contribution of pyrogenic organic carbon to total SOC. Furthermore, four SOM density fractions were sep...

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Section: Dichromate Oxidationmentioning

confidence: 99%

Effects of fire on soil organic matter quality along an altitudinal sequence on Mt. Etna, Sicily

Mastrolonardo

Certini

Krebs

et al. 2013

CATENA

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“…The negative charges of these acids bond with Al 3+ cations to form organometallic complexes, helping to reduce exchangeable Al 3+ . This process is very important in tropical areas as it stabilizes the SOM (Egli et al, 2008). Furthermore, old-growth forests are abundant in plant species in the Aquifoliaceae, Cornaceae, Cunoniaceae, Ericaceae, and Symplocaceae families (Blanco-Macías, 2001;del Castillo and Blanco-Macías, 2007), which are known as Al hyperaccumulators (Jansen et al, 2002).…”

Section: Ecological Significance Of Stand Age For Function-based Intementioning

confidence: 99%

Selection and interpretation of soil quality indicators for forest recovery after clearing of a tropical montane cloud forest in Mexico

Bautista-Cruz

Castillo

Etchevers

et al. 2012

Forest Ecology and Management

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“…The orders of soil known to store more C are Histosols (204.5 kg m − 2 up to 100 cm depth), followed by Andisols (30.6 kg m − 2 up to 100 cm depth) (Eswaran et al, 1993). In Andisols, organic C from humic compounds is stabilized in the form of organo-mineral complexes formed mainly with aluminum ions, but also with iron ions (Mizota and van Reeuwijk, 1989;Shoji et al, 1993;Egli et al, 2008). These complexes are very stable C reservoirs, due in part to the toxic effect that aluminum has on soil microbes, but also to the limited accessibility to enzymes, which protects organic compounds from mineralization (Tate and Theng, 1980).…”

Section: Introductionmentioning

confidence: 99%

Soil organic carbon stocks and forest productivity in volcanic ash soils of different age (1835–30,500 years B.P.) in Mexico

2009

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Clay minerals, oxyhydroxide formation, element leaching and humus development in volcanic soils

Cited by 86 publications

References 52 publications

Effects of fire on soil organic matter quality along an altitudinal sequence on Mt. Etna, Sicily

Effects of fire on soil organic matter quality along an altitudinal sequence on Mt. Etna, Sicily

Selection and interpretation of soil quality indicators for forest recovery after clearing of a tropical montane cloud forest in Mexico

Soil organic carbon stocks and forest productivity in volcanic ash soils of different age (1835–30,500 years B.P.) in Mexico

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