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
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/72695
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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 Técnicas2025-09-03T09:58:53Zoai: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:34982025-09-03 09:58:53.472CONICET 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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1842269548486590464 |
score |
13.13397 |