Effects of fire on soil organic matter in northern Amazonian forest fragments
Autor(a) principal: | |
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Data de Publicação: | 2022 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Acta Amazonica |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672022000100013 |
Resumo: | ABSTRACT Forest fires incorporate pyrogenic organic matter into the soil, affecting the characteristics of soil organic matter (SOM) due to its high aromaticity, increasing its renewal time. However, the factors that control the concentration of pyrogenic organic matter and its chemical composition and structure are still little known. Forest fragments dispersed in a savanna matrix of the northern Brazilian Amazon are frequently impacted by fires, which can affect the composition of SOM within the fragments. The aim of this study was to analyse the chemical composition of SOM in the border and interior of six forest fragments in the Roraima savanna, in the northern Brazilian Amazon. Soil samples were collected at 10-cm intervals up to 1 m in depth at the border and in the interior of each fragment. Soil organic material concentration was determined with 10% HF solution and its elemental composition, thermogravimetric index, and 13C CPMAS NMR spectroscopic analysis were determined. There was no significant difference in the aromaticity index between border and interior. The concentration of alkyl C structures between border (22 to 25%) and interior (19 to 29%) indicated the occurrence of medium-intensity fires in the study area. The thermogravimetric analysis showed no significant difference in the thermal stability of SOM between border and interior. Our results showed no pronounced difference in SOM quality up to 1 m depth between the border and the interior of the evaluated forest fragments, indicating that this compartment is stable throughout the fragments. |
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Effects of fire on soil organic matter in northern Amazonian forest fragmentsforest firesaromaticity indexelemental compositionFTIRABSTRACT Forest fires incorporate pyrogenic organic matter into the soil, affecting the characteristics of soil organic matter (SOM) due to its high aromaticity, increasing its renewal time. However, the factors that control the concentration of pyrogenic organic matter and its chemical composition and structure are still little known. Forest fragments dispersed in a savanna matrix of the northern Brazilian Amazon are frequently impacted by fires, which can affect the composition of SOM within the fragments. The aim of this study was to analyse the chemical composition of SOM in the border and interior of six forest fragments in the Roraima savanna, in the northern Brazilian Amazon. Soil samples were collected at 10-cm intervals up to 1 m in depth at the border and in the interior of each fragment. Soil organic material concentration was determined with 10% HF solution and its elemental composition, thermogravimetric index, and 13C CPMAS NMR spectroscopic analysis were determined. There was no significant difference in the aromaticity index between border and interior. The concentration of alkyl C structures between border (22 to 25%) and interior (19 to 29%) indicated the occurrence of medium-intensity fires in the study area. The thermogravimetric analysis showed no significant difference in the thermal stability of SOM between border and interior. Our results showed no pronounced difference in SOM quality up to 1 m depth between the border and the interior of the evaluated forest fragments, indicating that this compartment is stable throughout the fragments.Instituto Nacional de Pesquisas da Amazônia2022-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672022000100013Acta Amazonica v.52 n.1 2022reponame:Acta Amazonicainstname:Instituto Nacional de Pesquisas da Amazônia (INPA)instacron:INPA10.1590/1809-4392202100133info:eu-repo/semantics/openAccessSILVA,Libério Junio daDICK,Deborah PinheiroNECKEL,DjenniferNÓBREGA,Gabriel NutoRODRIGUES,Renato de Aragão R.BARBOSA,Reinaldo ImbrozioCORDEIRO,Renato Campelloeng2022-03-11T00:00:00Zoai:scielo:S0044-59672022000100013Revistahttps://acta.inpa.gov.br/PUBhttps://old.scielo.br/oai/scielo-oai.phpacta@inpa.gov.br||acta@inpa.gov.br1809-43920044-5967opendoar:2022-03-11T00:00Acta Amazonica - Instituto Nacional de Pesquisas da Amazônia (INPA)false |
dc.title.none.fl_str_mv |
Effects of fire on soil organic matter in northern Amazonian forest fragments |
title |
Effects of fire on soil organic matter in northern Amazonian forest fragments |
spellingShingle |
Effects of fire on soil organic matter in northern Amazonian forest fragments SILVA,Libério Junio da forest fires aromaticity index elemental composition FTIR |
title_short |
Effects of fire on soil organic matter in northern Amazonian forest fragments |
title_full |
Effects of fire on soil organic matter in northern Amazonian forest fragments |
title_fullStr |
Effects of fire on soil organic matter in northern Amazonian forest fragments |
title_full_unstemmed |
Effects of fire on soil organic matter in northern Amazonian forest fragments |
title_sort |
Effects of fire on soil organic matter in northern Amazonian forest fragments |
author |
SILVA,Libério Junio da |
author_facet |
SILVA,Libério Junio da DICK,Deborah Pinheiro NECKEL,Djennifer NÓBREGA,Gabriel Nuto RODRIGUES,Renato de Aragão R. BARBOSA,Reinaldo Imbrozio CORDEIRO,Renato Campello |
author_role |
author |
author2 |
DICK,Deborah Pinheiro NECKEL,Djennifer NÓBREGA,Gabriel Nuto RODRIGUES,Renato de Aragão R. BARBOSA,Reinaldo Imbrozio CORDEIRO,Renato Campello |
author2_role |
author author author author author author |
dc.contributor.author.fl_str_mv |
SILVA,Libério Junio da DICK,Deborah Pinheiro NECKEL,Djennifer NÓBREGA,Gabriel Nuto RODRIGUES,Renato de Aragão R. BARBOSA,Reinaldo Imbrozio CORDEIRO,Renato Campello |
dc.subject.por.fl_str_mv |
forest fires aromaticity index elemental composition FTIR |
topic |
forest fires aromaticity index elemental composition FTIR |
description |
ABSTRACT Forest fires incorporate pyrogenic organic matter into the soil, affecting the characteristics of soil organic matter (SOM) due to its high aromaticity, increasing its renewal time. However, the factors that control the concentration of pyrogenic organic matter and its chemical composition and structure are still little known. Forest fragments dispersed in a savanna matrix of the northern Brazilian Amazon are frequently impacted by fires, which can affect the composition of SOM within the fragments. The aim of this study was to analyse the chemical composition of SOM in the border and interior of six forest fragments in the Roraima savanna, in the northern Brazilian Amazon. Soil samples were collected at 10-cm intervals up to 1 m in depth at the border and in the interior of each fragment. Soil organic material concentration was determined with 10% HF solution and its elemental composition, thermogravimetric index, and 13C CPMAS NMR spectroscopic analysis were determined. There was no significant difference in the aromaticity index between border and interior. The concentration of alkyl C structures between border (22 to 25%) and interior (19 to 29%) indicated the occurrence of medium-intensity fires in the study area. The thermogravimetric analysis showed no significant difference in the thermal stability of SOM between border and interior. Our results showed no pronounced difference in SOM quality up to 1 m depth between the border and the interior of the evaluated forest fragments, indicating that this compartment is stable throughout the fragments. |
publishDate |
2022 |
dc.date.none.fl_str_mv |
2022-01-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672022000100013 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672022000100013 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/1809-4392202100133 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Instituto Nacional de Pesquisas da Amazônia |
publisher.none.fl_str_mv |
Instituto Nacional de Pesquisas da Amazônia |
dc.source.none.fl_str_mv |
Acta Amazonica v.52 n.1 2022 reponame:Acta Amazonica instname:Instituto Nacional de Pesquisas da Amazônia (INPA) instacron:INPA |
instname_str |
Instituto Nacional de Pesquisas da Amazônia (INPA) |
instacron_str |
INPA |
institution |
INPA |
reponame_str |
Acta Amazonica |
collection |
Acta Amazonica |
repository.name.fl_str_mv |
Acta Amazonica - Instituto Nacional de Pesquisas da Amazônia (INPA) |
repository.mail.fl_str_mv |
acta@inpa.gov.br||acta@inpa.gov.br |
_version_ |
1752129841553997824 |