Fire effects in the molecular structure of soil organic matter fractions under Quercus suber cover

Morillo, N. T. Jiménez; Rosa, José María De la; Waggoner, Derek C.; Almendros, G.; González-Vila, Francisco Javier; González‐Pérez, José Antonío

doi:10.1016/j.catena.2016.06.022

Cited by 59 publications

(35 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These findings are in accordance with our results where only a significant relationship between LST values and changes in soil carbon content was found. This could be related to (1) the decrease in SOC, when fire severity increases, [5,30,50,74], and (2) the changes in organic material associated with the transformation of biogenic structures or the input and removing of materials with differential resistance to thermal degradation [75,76]. In soils affected by high severity, these authors have found lignin markers followed by proteins, alkylaromatic and polycyclic aromatic hydrocarbons more resistant to thermal degradation.…”

Section: Discussionmentioning

confidence: 98%

Evaluation of Composite Burn Index and Land Surface Temperature for Assessing Soil Burn Severity in Mediterranean Fire-Prone Pine Ecosystems

Marcos

Fernández-García

Fernández–Manso

et al. 2018

Forests

View full text Add to dashboard Cite

We analysed the relationship between burn severity indicators, from remote sensing and field observations, and soil properties after a wildfire in a fire-prone Mediterranean ecosystem. Our study area was a large wildfire in a Pinus pinaster forest. Burn severity from remote sensing was identified by studying immediate post-fire Land Surface Temperature (LST). We also evaluated burn severity in the field applying the Composite Burn Index (CBI) in a total of 84 plots (30 m diameter). In each plot we evaluated litter consumption, ash colour and char depth as visual indicators. We collected soil samples and pH, soil organic carbon, dry aggregate size distribution (MWD), aggregate stability and water repellency were analysed. A controlled heating of soil was also carried out in the laboratory, with soil from the control plots, to compare with the changes produced in soils affected by different severity levels in the field. Our results shown that changes in soil properties affected by wildfire were only observed in soil aggregation in the high severity situation. The laboratory-controlled heating showed that temperatures of about 300 °C result in a significant reduction in soil organic carbon and MWD. Furthermore, soil organic carbon showed a significant decrease when LST values increased. Char depth was the best visual indicator to show changes in soil properties (mainly physical properties) in large fires that occur in Mediterranean pine forests. We conclude that CBI and post-fire LST can be considered good indicators of soil burn severity since both indicate the impact of fire on soil properties.

show abstract

Section: Discussionmentioning

confidence: 98%

Evaluation of Composite Burn Index and Land Surface Temperature for Assessing Soil Burn Severity in Mediterranean Fire-Prone Pine Ecosystems

Marcos

Fernández-García

Fernández–Manso

et al. 2018

Forests

View full text Add to dashboard Cite

show abstract

“…The five cover categories that were distinguished were: stones, ashes, bare soil, litter (including mulch) and understory vegetation. Soil sampling concerned the uppermost 2 cm of the mineral soil, as moderate severity fires as studied here, expectedly have only minor impacts at greater soil depths (Badía et al, 2014a(Badía et al, , 2014b. After air-drying the samples and sieving them at 2 mm mesh width, their organic matter content was determined using the loss-on-ignition method (ISO 11465).…”

Section: Characterization Of Habitat Conditionsmentioning

confidence: 99%

Long‐Term Impacts of Post‐Fire Mulching on Ground‐Dwelling Arthropod Communities in a Eucalypt Plantation

et al. 2016

View full text Add to dashboard Cite

In the past decades, Portugal like several other Mediterranean countries has been affected by frequent wildfires. This has led to various field tests of post‐fire soil conservation measures and, in particular, mulching with forest slash residues. While forest residue mulching was shown to be highly effective in reducing post‐fire erosion, its side effects on soil fauna communities have not been studied and are also difficult to predict from the – scarce – literature on mulch effects in general. Therefore, this study compared the abundance, diversity and taxonomic and functional composition of the ground‐dwelling arthropod communities of three mulched and, as control, three untreated erosion plots of roughly 100 m2 that had been installed in a eucalypt plantation almost immediately after a wildfire in 2010, some five years earlier. This was done using three pitfall traps per plot, placed at the lower, middle and upper part of the study slope. Roughly five years after mulching, its impacts on the ground‐dwelling arthropod were rather limited, especially compared to its effect on overall soil erosion rates. One of the few exceptions was the abundance of the Hymenoptera – one of the most frequently occurring orders – which was significantly lower in the mulched than control plots. This and other near significant mulching impacts found in this study plainly justify a follow‐up study on short‐term effects. Copyright © 2016 John Wiley & Sons, Ltd.

show abstract

“…The detailed study of the results obtained by Py-GC/MS allows determining the sources and contributions of SOM in the soil, evaluate the preservation of certain biogenic materials and the selective decomposition of others that come from vegetation or that are transformed into the soil (González-Vila et al, 1999;González-Pérez et al, 2003;Almendros et al, 2018). Among the compounds originating from pyrolysis, molecular markers such as aliphatic, aromatic and heteroaromatic compounds can be found, which are related to shifts in land use and/ or vegetation cover as well as perturbances such as wildfires or pollutant discharges (Buco et al, 2004;Faria et al, 2015;Miralles et al, 2015;Santana et al, 2015;Jiménez-Morillo et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Changes in soil organic matter composition after Scots pine afforestation in a native European beech forest revealed by analytical pyrolysis (Py-GC/MS)

Girona-García

Badía

Morillo

et al. 2019

Science of The Total Environment

Self Cite

View full text Add to dashboard Cite

The introduction of coniferous species in former deciduous forests may exert changes in soil organic matter, particularly in its molecular composition. In this work, pyrolysis-gas chromatography-mass spectrometry was used to study changes in SOM quality related to the centennial afforestation of Scots pine in an area formerly covered by European beech forest in the NE-flank of the Moncayo Natural Park (NE-Spain). For each soil profile three organic layers (fresh litter, fragmented litter and humified litter) and mineral soil horizons (Ah, E, Bhs and C) were studied. A total of 128 compounds were identified in the pyrograms, and composition differences were detected among the organic and mineral soil layers as well as between soils under beech and pine, for the main compound classes: nitrogen compounds, aromatics, lignin methoxyphenols, polycyclic aromatic hydrocarbons, lipids and polysaccharide-derived moieties. Such chemical differences were found to be derived from the biomass composition of the predominant vegetation type that was incorporated into the soil and from its progression into the soil profile. The analysis of the distribution of alkanes indicated higher SOM stabilization in the native beech

show abstract

Fire effects in the molecular structure of soil organic matter fractions under Quercus suber cover

Cited by 59 publications

References 52 publications

Evaluation of Composite Burn Index and Land Surface Temperature for Assessing Soil Burn Severity in Mediterranean Fire-Prone Pine Ecosystems

Evaluation of Composite Burn Index and Land Surface Temperature for Assessing Soil Burn Severity in Mediterranean Fire-Prone Pine Ecosystems

Long‐Term Impacts of Post‐Fire Mulching on Ground‐Dwelling Arthropod Communities in a Eucalypt Plantation

Changes in soil organic matter composition after Scots pine afforestation in a native European beech forest revealed by analytical pyrolysis (Py-GC/MS)

Contact Info

Product

Resources

About