Fire-rainfall relationships in Argentine Chaco savannas

Autores
Bravo, Sandra; Kuntz, C.; Grau, Hector Ricardo; Aráoz, Ezequiel
Año de publicación
2010
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We used dendroecological techniques to date fire scars in woody species growing in a subtropical savanna of the Argentine Chaco dry forests, and to explore the temporal trends of fire with rainfall variability at different temporal scales during the 20th century. Eight sampling sites were located along an ecotone between savanna and a dry forest, and a composite chronology was developed for a savanna, based on a total of 21 fire dates. The mean fire frequency was 0.18 fires year-1 and the mean fire interval was 3.3 years. The period post 1971 (which had 22% more rainfall) experienced a fire frequency more than two times higher than the period 1925-1970 (p<0.05). Decadal fire frequency was correlated to 10-years moving average rainfall (R2=0.58). Superposed Epoch Analysis showed that fires occur during years of above-average rainfall, and extensive fires tend to follow two years of above-average rainfall, all these associations being statistically significant. These results indicate a climatic control of fire regime, associated to enhanced fine fuels production during years of high rainfall, and imply that regional increase in rainfall associated to global changes in atmospheric circulation are affecting local ecosystems by significantly changing their disturbance regime.
Fil: Bravo, Sandra. Universidad Nacional de Misiones. Facultad de Ciencias Forestales; Argentina
Fil: Kuntz, C.. Instituto Nacional de Tecnología Agropecuaria; Argentina
Fil: Grau, Hector Ricardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán; Argentina. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo. Laboratorio de Investigaciones Ecológicas de las Yungas; Argentina
Fil: Aráoz, Ezequiel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán; Argentina. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo. Laboratorio de Investigaciones Ecológicas de las Yungas; Argentina
Materia
Climate
Fire
Fire Frequency
Precipitation
Temporal Changes
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/72695
Acceder
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network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Fire-rainfall relationships in Argentine Chaco savannasBravo, SandraKuntz, C.Grau, Hector RicardoAráoz, EzequielClimateFireFire FrequencyPrecipitationTemporal Changeshttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1We used dendroecological techniques to date fire scars in woody species growing in a subtropical savanna of the Argentine Chaco dry forests, and to explore the temporal trends of fire with rainfall variability at different temporal scales during the 20th century. Eight sampling sites were located along an ecotone between savanna and a dry forest, and a composite chronology was developed for a savanna, based on a total of 21 fire dates. The mean fire frequency was 0.18 fires year-1 and the mean fire interval was 3.3 years. The period post 1971 (which had 22% more rainfall) experienced a fire frequency more than two times higher than the period 1925-1970 (p<0.05). Decadal fire frequency was correlated to 10-years moving average rainfall (R2=0.58). Superposed Epoch Analysis showed that fires occur during years of above-average rainfall, and extensive fires tend to follow two years of above-average rainfall, all these associations being statistically significant. These results indicate a climatic control of fire regime, associated to enhanced fine fuels production during years of high rainfall, and imply that regional increase in rainfall associated to global changes in atmospheric circulation are affecting local ecosystems by significantly changing their disturbance regime.Fil: Bravo, Sandra. Universidad Nacional de Misiones. Facultad de Ciencias Forestales; ArgentinaFil: Kuntz, C.. Instituto Nacional de Tecnología Agropecuaria; ArgentinaFil: Grau, Hector Ricardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán; Argentina. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo. Laboratorio de Investigaciones Ecológicas de las Yungas; ArgentinaFil: Aráoz, Ezequiel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán; Argentina. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo. Laboratorio de Investigaciones Ecológicas de las Yungas; ArgentinaAcademic Press Ltd - Elsevier Science Ltd2010-10info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/72695Bravo, Sandra; Kuntz, C.; Grau, Hector Ricardo; Aráoz, Ezequiel; Fire-rainfall relationships in Argentine Chaco savannas; Academic Press Ltd - Elsevier Science Ltd; Journal of Arid Environments; 74; 10; 10-2010; 1319-13230140-1963CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.jaridenv.2010.04.010info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0140196310001084info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:07:26Zoai:ri.conicet.gov.ar:11336/72695instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 10:07:27.218CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Fire-rainfall relationships in Argentine Chaco savannas
title Fire-rainfall relationships in Argentine Chaco savannas
spellingShingle Fire-rainfall relationships in Argentine Chaco savannas
Bravo, Sandra
Climate
Fire
Fire Frequency
Precipitation
Temporal Changes
title_short Fire-rainfall relationships in Argentine Chaco savannas
title_full Fire-rainfall relationships in Argentine Chaco savannas
title_fullStr Fire-rainfall relationships in Argentine Chaco savannas
title_full_unstemmed Fire-rainfall relationships in Argentine Chaco savannas
title_sort Fire-rainfall relationships in Argentine Chaco savannas
dc.creator.none.fl_str_mv Bravo, Sandra
Kuntz, C.
Grau, Hector Ricardo
Aráoz, Ezequiel
author Bravo, Sandra
author_facet Bravo, Sandra
Kuntz, C.
Grau, Hector Ricardo
Aráoz, Ezequiel
author_role author
author2 Kuntz, C.
Grau, Hector Ricardo
Aráoz, Ezequiel
author2_role author
author
author
dc.subject.none.fl_str_mv Climate
Fire
Fire Frequency
Precipitation
Temporal Changes
topic Climate
Fire
Fire Frequency
Precipitation
Temporal Changes
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv We used dendroecological techniques to date fire scars in woody species growing in a subtropical savanna of the Argentine Chaco dry forests, and to explore the temporal trends of fire with rainfall variability at different temporal scales during the 20th century. Eight sampling sites were located along an ecotone between savanna and a dry forest, and a composite chronology was developed for a savanna, based on a total of 21 fire dates. The mean fire frequency was 0.18 fires year-1 and the mean fire interval was 3.3 years. The period post 1971 (which had 22% more rainfall) experienced a fire frequency more than two times higher than the period 1925-1970 (p<0.05). Decadal fire frequency was correlated to 10-years moving average rainfall (R2=0.58). Superposed Epoch Analysis showed that fires occur during years of above-average rainfall, and extensive fires tend to follow two years of above-average rainfall, all these associations being statistically significant. These results indicate a climatic control of fire regime, associated to enhanced fine fuels production during years of high rainfall, and imply that regional increase in rainfall associated to global changes in atmospheric circulation are affecting local ecosystems by significantly changing their disturbance regime.
Fil: Bravo, Sandra. Universidad Nacional de Misiones. Facultad de Ciencias Forestales; Argentina
Fil: Kuntz, C.. Instituto Nacional de Tecnología Agropecuaria; Argentina
Fil: Grau, Hector Ricardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán; Argentina. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo. Laboratorio de Investigaciones Ecológicas de las Yungas; Argentina
Fil: Aráoz, Ezequiel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán; Argentina. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo. Laboratorio de Investigaciones Ecológicas de las Yungas; Argentina
description We used dendroecological techniques to date fire scars in woody species growing in a subtropical savanna of the Argentine Chaco dry forests, and to explore the temporal trends of fire with rainfall variability at different temporal scales during the 20th century. Eight sampling sites were located along an ecotone between savanna and a dry forest, and a composite chronology was developed for a savanna, based on a total of 21 fire dates. The mean fire frequency was 0.18 fires year-1 and the mean fire interval was 3.3 years. The period post 1971 (which had 22% more rainfall) experienced a fire frequency more than two times higher than the period 1925-1970 (p<0.05). Decadal fire frequency was correlated to 10-years moving average rainfall (R2=0.58). Superposed Epoch Analysis showed that fires occur during years of above-average rainfall, and extensive fires tend to follow two years of above-average rainfall, all these associations being statistically significant. These results indicate a climatic control of fire regime, associated to enhanced fine fuels production during years of high rainfall, and imply that regional increase in rainfall associated to global changes in atmospheric circulation are affecting local ecosystems by significantly changing their disturbance regime.
publishDate 2010
dc.date.none.fl_str_mv 2010-10
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/72695
Bravo, Sandra; Kuntz, C.; Grau, Hector Ricardo; Aráoz, Ezequiel; Fire-rainfall relationships in Argentine Chaco savannas; Academic Press Ltd - Elsevier Science Ltd; Journal of Arid Environments; 74; 10; 10-2010; 1319-1323
0140-1963
CONICET Digital
CONICET
url http://hdl.handle.net/11336/72695
identifier_str_mv Bravo, Sandra; Kuntz, C.; Grau, Hector Ricardo; Aráoz, Ezequiel; Fire-rainfall relationships in Argentine Chaco savannas; Academic Press Ltd - Elsevier Science Ltd; Journal of Arid Environments; 74; 10; 10-2010; 1319-1323
0140-1963
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jaridenv.2010.04.010
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0140196310001084
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Academic Press Ltd - Elsevier Science Ltd
publisher.none.fl_str_mv Academic Press Ltd - Elsevier Science Ltd
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.069144

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