Effect of a wildfire and of post-fire restoration actions in the organic matter structure in soil fractions
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10174/31548 https://doi.org/10.1016/j.scitotenv.2020.138715 |
Resumo: | The impact of wildfires and of restoration actions on soil organic matter (SOM) content and structure was studied in a soil under pine (Pinus pinea) from Doñana National Park (SW Spain). Samples were collected from burnt areas before (B) and after post-fire restoration (BR) and compared with an unburnt (UB) site. Analytical pyrolysis (Py-GC/MS) was used to investigate SOM molecular composition in whole soil samples and in coarse (CF) and fine (FF) fractions. The results were interpreted using a van Krevelen graphical-statistical method. Highest total organic carbon (TOC) was found in UB soil and no differences were found between B and BR soils. The CF had the highest TOC values and FF presented differences among the three scenarios. Respect to SOM structure, the B soil was depleted in lignin and enriched in unspecific aromatics and polycyclic aromatic hydrocarbons, and in all scenarios, CF SOM consisted mainly of lignocellulose derived compounds and fatty acids. In general, FF SOM was found more altered than CF. High contribution of unspecific aromatic compounds and polycyclic aromatic hydrocarbons was observed in B-FF whereas BR-FF samples comprised considerable proportions of compounds from labile biomass, possibly due to soil mixing during rehabilitation actions. The fire caused a defunctionalisation of lignin-derived phenolics and the formation of pyrogenic compounds. The van Krevelen diagram was found useful to—at first sight—differentiate between chemical processes caused by fire and of the rehabilitation actions. Fire exerted SOM demethoxylation, dealkylation and dehydration. Our results indicate that soil management actions after the fire lead to an increase in aromaticity corresponding to the accumulation of lignin and polycyclic aromatic compounds. This suggests additional inputs from charred lignocellulosic biomass, including black carbon, that was incorporated into the soil during rehabilitation practices. |
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Effect of a wildfire and of post-fire restoration actions in the organic matter structure in soil fractionsWildfiresSoil organic matterSoil rehabilitationAnalytical pyrolysisChemometricsThe impact of wildfires and of restoration actions on soil organic matter (SOM) content and structure was studied in a soil under pine (Pinus pinea) from Doñana National Park (SW Spain). Samples were collected from burnt areas before (B) and after post-fire restoration (BR) and compared with an unburnt (UB) site. Analytical pyrolysis (Py-GC/MS) was used to investigate SOM molecular composition in whole soil samples and in coarse (CF) and fine (FF) fractions. The results were interpreted using a van Krevelen graphical-statistical method. Highest total organic carbon (TOC) was found in UB soil and no differences were found between B and BR soils. The CF had the highest TOC values and FF presented differences among the three scenarios. Respect to SOM structure, the B soil was depleted in lignin and enriched in unspecific aromatics and polycyclic aromatic hydrocarbons, and in all scenarios, CF SOM consisted mainly of lignocellulose derived compounds and fatty acids. In general, FF SOM was found more altered than CF. High contribution of unspecific aromatic compounds and polycyclic aromatic hydrocarbons was observed in B-FF whereas BR-FF samples comprised considerable proportions of compounds from labile biomass, possibly due to soil mixing during rehabilitation actions. The fire caused a defunctionalisation of lignin-derived phenolics and the formation of pyrogenic compounds. The van Krevelen diagram was found useful to—at first sight—differentiate between chemical processes caused by fire and of the rehabilitation actions. Fire exerted SOM demethoxylation, dealkylation and dehydration. Our results indicate that soil management actions after the fire lead to an increase in aromaticity corresponding to the accumulation of lignin and polycyclic aromatic compounds. This suggests additional inputs from charred lignocellulosic biomass, including black carbon, that was incorporated into the soil during rehabilitation practices.Elseviers2022-03-30T13:57:12Z2022-03-302020-08-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/10174/31548http://hdl.handle.net/10174/31548https://doi.org/10.1016/j.scitotenv.2020.138715engJiménez-Morillo NT, Almendros G, De la Rosa JM, Jordán A, Zavala LM, Granged AJP, González-Pérez JA (2020b). Effect of a wildfire and of post-fire restoration actions in the organic matter structure in soil fractions. Sci. Total Environ. 728, 138715.Science of the total environmentntjm@uevora.ptndndndndndnd396Jiménez-Morillo, Nicasio T.Almendros, GonzaloDe la Rosa, José M.Jordán, AntonioZavala, Lorena M.Granged, Arturo J.P.González-Pérez, José A.info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-01-03T19:31:18Zoai:dspace.uevora.pt:10174/31548Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T01:20:41.576605Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Effect of a wildfire and of post-fire restoration actions in the organic matter structure in soil fractions |
title |
Effect of a wildfire and of post-fire restoration actions in the organic matter structure in soil fractions |
spellingShingle |
Effect of a wildfire and of post-fire restoration actions in the organic matter structure in soil fractions Jiménez-Morillo, Nicasio T. Wildfires Soil organic matter Soil rehabilitation Analytical pyrolysis Chemometrics |
title_short |
Effect of a wildfire and of post-fire restoration actions in the organic matter structure in soil fractions |
title_full |
Effect of a wildfire and of post-fire restoration actions in the organic matter structure in soil fractions |
title_fullStr |
Effect of a wildfire and of post-fire restoration actions in the organic matter structure in soil fractions |
title_full_unstemmed |
Effect of a wildfire and of post-fire restoration actions in the organic matter structure in soil fractions |
title_sort |
Effect of a wildfire and of post-fire restoration actions in the organic matter structure in soil fractions |
author |
Jiménez-Morillo, Nicasio T. |
author_facet |
Jiménez-Morillo, Nicasio T. Almendros, Gonzalo De la Rosa, José M. Jordán, Antonio Zavala, Lorena M. Granged, Arturo J.P. González-Pérez, José A. |
author_role |
author |
author2 |
Almendros, Gonzalo De la Rosa, José M. Jordán, Antonio Zavala, Lorena M. Granged, Arturo J.P. González-Pérez, José A. |
author2_role |
author author author author author author |
dc.contributor.author.fl_str_mv |
Jiménez-Morillo, Nicasio T. Almendros, Gonzalo De la Rosa, José M. Jordán, Antonio Zavala, Lorena M. Granged, Arturo J.P. González-Pérez, José A. |
dc.subject.por.fl_str_mv |
Wildfires Soil organic matter Soil rehabilitation Analytical pyrolysis Chemometrics |
topic |
Wildfires Soil organic matter Soil rehabilitation Analytical pyrolysis Chemometrics |
description |
The impact of wildfires and of restoration actions on soil organic matter (SOM) content and structure was studied in a soil under pine (Pinus pinea) from Doñana National Park (SW Spain). Samples were collected from burnt areas before (B) and after post-fire restoration (BR) and compared with an unburnt (UB) site. Analytical pyrolysis (Py-GC/MS) was used to investigate SOM molecular composition in whole soil samples and in coarse (CF) and fine (FF) fractions. The results were interpreted using a van Krevelen graphical-statistical method. Highest total organic carbon (TOC) was found in UB soil and no differences were found between B and BR soils. The CF had the highest TOC values and FF presented differences among the three scenarios. Respect to SOM structure, the B soil was depleted in lignin and enriched in unspecific aromatics and polycyclic aromatic hydrocarbons, and in all scenarios, CF SOM consisted mainly of lignocellulose derived compounds and fatty acids. In general, FF SOM was found more altered than CF. High contribution of unspecific aromatic compounds and polycyclic aromatic hydrocarbons was observed in B-FF whereas BR-FF samples comprised considerable proportions of compounds from labile biomass, possibly due to soil mixing during rehabilitation actions. The fire caused a defunctionalisation of lignin-derived phenolics and the formation of pyrogenic compounds. The van Krevelen diagram was found useful to—at first sight—differentiate between chemical processes caused by fire and of the rehabilitation actions. Fire exerted SOM demethoxylation, dealkylation and dehydration. Our results indicate that soil management actions after the fire lead to an increase in aromaticity corresponding to the accumulation of lignin and polycyclic aromatic compounds. This suggests additional inputs from charred lignocellulosic biomass, including black carbon, that was incorporated into the soil during rehabilitation practices. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-08-01T00:00:00Z 2022-03-30T13:57:12Z 2022-03-30 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10174/31548 http://hdl.handle.net/10174/31548 https://doi.org/10.1016/j.scitotenv.2020.138715 |
url |
http://hdl.handle.net/10174/31548 https://doi.org/10.1016/j.scitotenv.2020.138715 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Jiménez-Morillo NT, Almendros G, De la Rosa JM, Jordán A, Zavala LM, Granged AJP, González-Pérez JA (2020b). Effect of a wildfire and of post-fire restoration actions in the organic matter structure in soil fractions. Sci. Total Environ. 728, 138715. Science of the total environment ntjm@uevora.pt nd nd nd nd nd nd 396 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.publisher.none.fl_str_mv |
Elseviers |
publisher.none.fl_str_mv |
Elseviers |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
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RCAAP |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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