Impact of forest fires on water quality and nutrient dynamics in burned streams in Patagonia

Autores
Brand, Cecilia; Dromaz, Walter Mauricio; Carignano, María Luciana; Ravasi, Cintia; Assef, Yanina Andrea
Año de publicación
2025
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Wildfires affect extensive areas worldwide each year, causing profound impacts. Their effects on water quality vary depending on soil characteristics, hydrologic regimes, and fire severity. In March 2021, a large wildfire affected over 13,000 ha of Patagonian Forest in Argentina. To assess its impact on water quality, four streams draining burned catchments and four reference streams were selected. Fire-related effects were observed in conductivity, total suspended solids (TSS), and nutrients. Conductivity and TSS peaked initially at 144.5 mg/l (1.7× than reference sites) and 30.5 mg/l (22.1×), respectively. Study-wide trends indicate a sustained enrichment of nitrogen forms in burned sites and a decline in phosphorus levels. Initial total phosphorus (TP)concentrations reached 112.5 μg/l (17×). The highest total nitrogen (TN) value was observed at last high-flow sampling in burned sites (845.6 μg/l, 10.4×), mainly driven by an increase in NO₃− + NO₂− . TN export overall study average was 325.8 kg/km2/yr (11×), while TP export reached its maximum at the first high-flow period. Most metal concentrations exhibited similar trends in burned and reference streams, peaking after the first postfire rainfall, with significantly higher levels of arsenic in burned sites. These findings underscore the significant and lasting impacts of wildfires on aquatic ecosystems, highlighting the need for management strategies that mitigate the consequences of such extreme events on freshwater biodiversity and ecosystem functioning. Post-fire conditions require a focused assessment due to potential synergistic impacts on water quality.
Fil: Brand, Cecilia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Centro de Investigación Esquel de Montaña y Estepa Patagóica. Universidad Nacional de la Patagonia "San Juan Bosco". Facultad de Ciencias Naturales - Sede Esquel. Centro de Investigación Esquel de Montaña y Estepa Patagónica; Argentina
Fil: Dromaz, Walter Mauricio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Centro de Investigación Esquel de Montaña y Estepa Patagóica. Universidad Nacional de la Patagonia "San Juan Bosco". Facultad de Ciencias Naturales - Sede Esquel. Centro de Investigación Esquel de Montaña y Estepa Patagónica; Argentina
Fil: Carignano, María Luciana. Invap S. E.; Argentina
Fil: Ravasi, Cintia. Invap S. E.; Argentina
Fil: Assef, Yanina Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Centro de Investigación Esquel de Montaña y Estepa Patagóica. Universidad Nacional de la Patagonia "San Juan Bosco". Facultad de Ciencias Naturales - Sede Esquel. Centro de Investigación Esquel de Montaña y Estepa Patagónica; Argentina
Materia
FOREST FIRES
NUTRIENTS
WILDFIRES
HEADWATERS
WATER QUALITY
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:11336/277492
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/277492
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Impact of forest fires on water quality and nutrient dynamics in burned streams in PatagoniaBrand, CeciliaDromaz, Walter MauricioCarignano, María LucianaRavasi, CintiaAssef, Yanina AndreaFOREST FIRESNUTRIENTSWILDFIRESHEADWATERSWATER QUALITYhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Wildfires affect extensive areas worldwide each year, causing profound impacts. Their effects on water quality vary depending on soil characteristics, hydrologic regimes, and fire severity. In March 2021, a large wildfire affected over 13,000 ha of Patagonian Forest in Argentina. To assess its impact on water quality, four streams draining burned catchments and four reference streams were selected. Fire-related effects were observed in conductivity, total suspended solids (TSS), and nutrients. Conductivity and TSS peaked initially at 144.5 mg/l (1.7× than reference sites) and 30.5 mg/l (22.1×), respectively. Study-wide trends indicate a sustained enrichment of nitrogen forms in burned sites and a decline in phosphorus levels. Initial total phosphorus (TP)concentrations reached 112.5 μg/l (17×). The highest total nitrogen (TN) value was observed at last high-flow sampling in burned sites (845.6 μg/l, 10.4×), mainly driven by an increase in NO₃− + NO₂− . TN export overall study average was 325.8 kg/km2/yr (11×), while TP export reached its maximum at the first high-flow period. Most metal concentrations exhibited similar trends in burned and reference streams, peaking after the first postfire rainfall, with significantly higher levels of arsenic in burned sites. These findings underscore the significant and lasting impacts of wildfires on aquatic ecosystems, highlighting the need for management strategies that mitigate the consequences of such extreme events on freshwater biodiversity and ecosystem functioning. Post-fire conditions require a focused assessment due to potential synergistic impacts on water quality.Fil: Brand, Cecilia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Centro de Investigación Esquel de Montaña y Estepa Patagóica. Universidad Nacional de la Patagonia "San Juan Bosco". Facultad de Ciencias Naturales - Sede Esquel. Centro de Investigación Esquel de Montaña y Estepa Patagónica; ArgentinaFil: Dromaz, Walter Mauricio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Centro de Investigación Esquel de Montaña y Estepa Patagóica. Universidad Nacional de la Patagonia "San Juan Bosco". Facultad de Ciencias Naturales - Sede Esquel. Centro de Investigación Esquel de Montaña y Estepa Patagónica; ArgentinaFil: Carignano, María Luciana. Invap S. E.; ArgentinaFil: Ravasi, Cintia. Invap S. E.; ArgentinaFil: Assef, Yanina Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Centro de Investigación Esquel de Montaña y Estepa Patagóica. Universidad Nacional de la Patagonia "San Juan Bosco". Facultad de Ciencias Naturales - Sede Esquel. Centro de Investigación Esquel de Montaña y Estepa Patagónica; ArgentinaElsevier2025-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/277492Brand, Cecilia; Dromaz, Walter Mauricio; Carignano, María Luciana; Ravasi, Cintia; Assef, Yanina Andrea; Impact of forest fires on water quality and nutrient dynamics in burned streams in Patagonia; Elsevier; Science of the Total Environment; 1006; 12-2025; 1-120048-9697CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://linkinghub.elsevier.com/retrieve/pii/S0048969725025276info:eu-repo/semantics/altIdentifier/doi/10.1016/j.scitotenv.2025.180887info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-12-23T14:34:31Zoai:ri.conicet.gov.ar:11336/277492instacron: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:34982025-12-23 14:34:32.204CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Impact of forest fires on water quality and nutrient dynamics in burned streams in Patagonia
title Impact of forest fires on water quality and nutrient dynamics in burned streams in Patagonia
spellingShingle Impact of forest fires on water quality and nutrient dynamics in burned streams in Patagonia
Brand, Cecilia
FOREST FIRES
NUTRIENTS
WILDFIRES
HEADWATERS
WATER QUALITY
title_short Impact of forest fires on water quality and nutrient dynamics in burned streams in Patagonia
title_full Impact of forest fires on water quality and nutrient dynamics in burned streams in Patagonia
title_fullStr Impact of forest fires on water quality and nutrient dynamics in burned streams in Patagonia
title_full_unstemmed Impact of forest fires on water quality and nutrient dynamics in burned streams in Patagonia
title_sort Impact of forest fires on water quality and nutrient dynamics in burned streams in Patagonia
dc.creator.none.fl_str_mv Brand, Cecilia
Dromaz, Walter Mauricio
Carignano, María Luciana
Ravasi, Cintia
Assef, Yanina Andrea
author Brand, Cecilia
author_facet Brand, Cecilia
Dromaz, Walter Mauricio
Carignano, María Luciana
Ravasi, Cintia
Assef, Yanina Andrea
author_role author
author2 Dromaz, Walter Mauricio
Carignano, María Luciana
Ravasi, Cintia
Assef, Yanina Andrea
author2_role author
author
author
author
dc.subject.none.fl_str_mv FOREST FIRES
NUTRIENTS
WILDFIRES
HEADWATERS
WATER QUALITY
topic FOREST FIRES
NUTRIENTS
WILDFIRES
HEADWATERS
WATER QUALITY
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Wildfires affect extensive areas worldwide each year, causing profound impacts. Their effects on water quality vary depending on soil characteristics, hydrologic regimes, and fire severity. In March 2021, a large wildfire affected over 13,000 ha of Patagonian Forest in Argentina. To assess its impact on water quality, four streams draining burned catchments and four reference streams were selected. Fire-related effects were observed in conductivity, total suspended solids (TSS), and nutrients. Conductivity and TSS peaked initially at 144.5 mg/l (1.7× than reference sites) and 30.5 mg/l (22.1×), respectively. Study-wide trends indicate a sustained enrichment of nitrogen forms in burned sites and a decline in phosphorus levels. Initial total phosphorus (TP)concentrations reached 112.5 μg/l (17×). The highest total nitrogen (TN) value was observed at last high-flow sampling in burned sites (845.6 μg/l, 10.4×), mainly driven by an increase in NO₃− + NO₂− . TN export overall study average was 325.8 kg/km2/yr (11×), while TP export reached its maximum at the first high-flow period. Most metal concentrations exhibited similar trends in burned and reference streams, peaking after the first postfire rainfall, with significantly higher levels of arsenic in burned sites. These findings underscore the significant and lasting impacts of wildfires on aquatic ecosystems, highlighting the need for management strategies that mitigate the consequences of such extreme events on freshwater biodiversity and ecosystem functioning. Post-fire conditions require a focused assessment due to potential synergistic impacts on water quality.
Fil: Brand, Cecilia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Centro de Investigación Esquel de Montaña y Estepa Patagóica. Universidad Nacional de la Patagonia "San Juan Bosco". Facultad de Ciencias Naturales - Sede Esquel. Centro de Investigación Esquel de Montaña y Estepa Patagónica; Argentina
Fil: Dromaz, Walter Mauricio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Centro de Investigación Esquel de Montaña y Estepa Patagóica. Universidad Nacional de la Patagonia "San Juan Bosco". Facultad de Ciencias Naturales - Sede Esquel. Centro de Investigación Esquel de Montaña y Estepa Patagónica; Argentina
Fil: Carignano, María Luciana. Invap S. E.; Argentina
Fil: Ravasi, Cintia. Invap S. E.; Argentina
Fil: Assef, Yanina Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Centro de Investigación Esquel de Montaña y Estepa Patagóica. Universidad Nacional de la Patagonia "San Juan Bosco". Facultad de Ciencias Naturales - Sede Esquel. Centro de Investigación Esquel de Montaña y Estepa Patagónica; Argentina
description Wildfires affect extensive areas worldwide each year, causing profound impacts. Their effects on water quality vary depending on soil characteristics, hydrologic regimes, and fire severity. In March 2021, a large wildfire affected over 13,000 ha of Patagonian Forest in Argentina. To assess its impact on water quality, four streams draining burned catchments and four reference streams were selected. Fire-related effects were observed in conductivity, total suspended solids (TSS), and nutrients. Conductivity and TSS peaked initially at 144.5 mg/l (1.7× than reference sites) and 30.5 mg/l (22.1×), respectively. Study-wide trends indicate a sustained enrichment of nitrogen forms in burned sites and a decline in phosphorus levels. Initial total phosphorus (TP)concentrations reached 112.5 μg/l (17×). The highest total nitrogen (TN) value was observed at last high-flow sampling in burned sites (845.6 μg/l, 10.4×), mainly driven by an increase in NO₃− + NO₂− . TN export overall study average was 325.8 kg/km2/yr (11×), while TP export reached its maximum at the first high-flow period. Most metal concentrations exhibited similar trends in burned and reference streams, peaking after the first postfire rainfall, with significantly higher levels of arsenic in burned sites. These findings underscore the significant and lasting impacts of wildfires on aquatic ecosystems, highlighting the need for management strategies that mitigate the consequences of such extreme events on freshwater biodiversity and ecosystem functioning. Post-fire conditions require a focused assessment due to potential synergistic impacts on water quality.
publishDate 2025
dc.date.none.fl_str_mv 2025-12
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/11336/277492
Brand, Cecilia; Dromaz, Walter Mauricio; Carignano, María Luciana; Ravasi, Cintia; Assef, Yanina Andrea; Impact of forest fires on water quality and nutrient dynamics in burned streams in Patagonia; Elsevier; Science of the Total Environment; 1006; 12-2025; 1-12
0048-9697
CONICET Digital
CONICET
url http://hdl.handle.net/11336/277492
identifier_str_mv Brand, Cecilia; Dromaz, Walter Mauricio; Carignano, María Luciana; Ravasi, Cintia; Assef, Yanina Andrea; Impact of forest fires on water quality and nutrient dynamics in burned streams in Patagonia; Elsevier; Science of the Total Environment; 1006; 12-2025; 1-12
0048-9697
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://linkinghub.elsevier.com/retrieve/pii/S0048969725025276
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.scitotenv.2025.180887
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
application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
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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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