Effects of Climate Change on Soil Organic Matter C and H Isotope Composition in a Mediterranean Savannah (Dehesa): An Assessment Using Py-CSIA

Dehesas are Mediterranean agro-sylvo-pastoral systems sensitive to climate change. Extreme climate conditions forecasted for Mediterranean areas may change soil C turnover, which is of relevance for soil biogeochemistry modeling. The effect of climate change on soil organic matter (SOM) is investiga...

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Autores: San Emeterio, Layla M., Martínez Zavala, Lorena María, Jiménez Morillo, Nicasio T., Pérez Ramos, Ignacio Manuel, González Pérez, José Antonio
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2023
País:España
Institución:Universidad de Sevilla (US)
Repositorio:idUS. Depósito de Investigación de la Universidad de Sevilla
OAI Identifier:oai:idus.us.es:11441/155888
Acceso en línea:https://hdl.handle.net/11441/155888
https://doi.org/10.1021/acs.est.3c01816
Access Level:acceso abierto
Palabra clave:δ13C
δ2H
nalyticalpyrolysis
Mediterranean soil
biomarkers
climatechange
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spelling Effects of Climate Change on Soil Organic Matter C and H Isotope Composition in a Mediterranean Savannah (Dehesa): An Assessment Using Py-CSIASan Emeterio, Layla M.Martínez Zavala, Lorena MaríaJiménez Morillo, Nicasio T.Pérez Ramos, Ignacio ManuelGonzález Pérez, José Antonioδ13Cδ2HnalyticalpyrolysisMediterranean soilbiomarkersclimatechangeDehesas are Mediterranean agro-sylvo-pastoral systems sensitive to climate change. Extreme climate conditions forecasted for Mediterranean areas may change soil C turnover, which is of relevance for soil biogeochemistry modeling. The effect of climate change on soil organic matter (SOM) is investigated in a field experiment mimicking environmental conditions of global change scenarios (soil temperature increase, +2–3 °C, W; rainfall exclusion, 30%, D; a combination of both, W+D). Pyrolysis-compound-specific isotope analysis (Py-CSIA) is used for C and H isotope characterization of SOM compounds and to forecast trends exerted by the induced climate shift. After 2.5 years, significant δ13C and δ2H isotopic enrichments were detected. Observed short- and mid-chain n-alkane δ13C shifts point to an increased microbial SOM reworking in the W treatment; a 2H enrichment of up to 40‰ of lignin methoxyphenols was found when combining W+D treatments under the tree canopy, probably related to H fractionation due to increased soil water evapotranspiration. Our findings indicate that the effect of the tree canopy drives SOM dynamics in dehesas and that, in the short term, foreseen climate change scenarios will exert changes in the SOM dynamics comprising the biogeochemical C and H cycles.Programa Conjunto Europeo “EJPSOIL”, Horizonte 2020 de la UE EOM4SOIL, MIXROOT-C y MAXROOT-CMinisterio de Ciencia Innovación y Universidades (MICIU) INTER-CARBON (CGL2016-78937-R) y DECAFÚN (CGL2015-70123-R)American Chemical SocietyCristalografía, Mineralogía y Química AgrícolaEuropean Union (UE). H2020Ministerio de Ciencia, Innovación y Universidades (MICINN). España2023info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfapplication/pdfhttps://hdl.handle.net/11441/155888https://doi.org/10.1021/acs.est.3c01816reponame:idUS. Depósito de Investigación de la Universidad de Sevillainstname:Universidad de Sevilla (US)InglésEnvironmental Science and Technology, 57 (37), 13851-13862.EOM4SOILMIXROOT-CMAXROOT-CINTER-CARBON (CGL2016-78937-R)DECAFÚN (CGL2015-70123-R)https://doi.org/10.1021/acs.est.3c01816info:eu-repo/semantics/openAccessoai:idus.us.es:11441/1558882026-06-17T12:51:07Z
dc.title.none.fl_str_mv Effects of Climate Change on Soil Organic Matter C and H Isotope Composition in a Mediterranean Savannah (Dehesa): An Assessment Using Py-CSIA
title Effects of Climate Change on Soil Organic Matter C and H Isotope Composition in a Mediterranean Savannah (Dehesa): An Assessment Using Py-CSIA
spellingShingle Effects of Climate Change on Soil Organic Matter C and H Isotope Composition in a Mediterranean Savannah (Dehesa): An Assessment Using Py-CSIA
San Emeterio, Layla M.
δ13C
δ2H
nalyticalpyrolysis
Mediterranean soil
biomarkers
climatechange
title_short Effects of Climate Change on Soil Organic Matter C and H Isotope Composition in a Mediterranean Savannah (Dehesa): An Assessment Using Py-CSIA
title_full Effects of Climate Change on Soil Organic Matter C and H Isotope Composition in a Mediterranean Savannah (Dehesa): An Assessment Using Py-CSIA
title_fullStr Effects of Climate Change on Soil Organic Matter C and H Isotope Composition in a Mediterranean Savannah (Dehesa): An Assessment Using Py-CSIA
title_full_unstemmed Effects of Climate Change on Soil Organic Matter C and H Isotope Composition in a Mediterranean Savannah (Dehesa): An Assessment Using Py-CSIA
title_sort Effects of Climate Change on Soil Organic Matter C and H Isotope Composition in a Mediterranean Savannah (Dehesa): An Assessment Using Py-CSIA
dc.creator.none.fl_str_mv San Emeterio, Layla M.
Martínez Zavala, Lorena María
Jiménez Morillo, Nicasio T.
Pérez Ramos, Ignacio Manuel
González Pérez, José Antonio
author San Emeterio, Layla M.
author_facet San Emeterio, Layla M.
Martínez Zavala, Lorena María
Jiménez Morillo, Nicasio T.
Pérez Ramos, Ignacio Manuel
González Pérez, José Antonio
author_role author
author2 Martínez Zavala, Lorena María
Jiménez Morillo, Nicasio T.
Pérez Ramos, Ignacio Manuel
González Pérez, José Antonio
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Cristalografía, Mineralogía y Química Agrícola
European Union (UE). H2020
Ministerio de Ciencia, Innovación y Universidades (MICINN). España
dc.subject.none.fl_str_mv δ13C
δ2H
nalyticalpyrolysis
Mediterranean soil
biomarkers
climatechange
topic δ13C
δ2H
nalyticalpyrolysis
Mediterranean soil
biomarkers
climatechange
description Dehesas are Mediterranean agro-sylvo-pastoral systems sensitive to climate change. Extreme climate conditions forecasted for Mediterranean areas may change soil C turnover, which is of relevance for soil biogeochemistry modeling. The effect of climate change on soil organic matter (SOM) is investigated in a field experiment mimicking environmental conditions of global change scenarios (soil temperature increase, +2–3 °C, W; rainfall exclusion, 30%, D; a combination of both, W+D). Pyrolysis-compound-specific isotope analysis (Py-CSIA) is used for C and H isotope characterization of SOM compounds and to forecast trends exerted by the induced climate shift. After 2.5 years, significant δ13C and δ2H isotopic enrichments were detected. Observed short- and mid-chain n-alkane δ13C shifts point to an increased microbial SOM reworking in the W treatment; a 2H enrichment of up to 40‰ of lignin methoxyphenols was found when combining W+D treatments under the tree canopy, probably related to H fractionation due to increased soil water evapotranspiration. Our findings indicate that the effect of the tree canopy drives SOM dynamics in dehesas and that, in the short term, foreseen climate change scenarios will exert changes in the SOM dynamics comprising the biogeochemical C and H cycles.
publishDate 2023
dc.date.none.fl_str_mv 2023
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/11441/155888
https://doi.org/10.1021/acs.est.3c01816
url https://hdl.handle.net/11441/155888
https://doi.org/10.1021/acs.est.3c01816
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Environmental Science and Technology, 57 (37), 13851-13862.
EOM4SOIL
MIXROOT-C
MAXROOT-C
INTER-CARBON (CGL2016-78937-R)
DECAFÚN (CGL2015-70123-R)
https://doi.org/10.1021/acs.est.3c01816
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv American Chemical Society
publisher.none.fl_str_mv American Chemical Society
dc.source.none.fl_str_mv reponame:idUS. Depósito de Investigación de la Universidad de Sevilla
instname:Universidad de Sevilla (US)
instname_str Universidad de Sevilla (US)
reponame_str idUS. Depósito de Investigación de la Universidad de Sevilla
collection idUS. Depósito de Investigación de la Universidad de Sevilla
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.812429

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