Fire frequency affects fire behavior in open savannas of the Cerrado
Autor(a) principal: | |
---|---|
Data de Publicação: | 2021 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.foreco.2020.118850 http://hdl.handle.net/11449/205593 |
Resumo: | Fire is an environmental factor that helps in shaping plant communities by influencing their structure and function. Frequency is an important component of the fire regime. In tropical savannas, fire frequency is high, mostly owing to the high production and accumulation of fuel, which mainly comprising grasses, the dominant growth form in the Cerrado (Brazilian savanna) open physiognomies. We evaluated how the quantity, quality, and horizontal and vertical distribution of fuel influence fire behavior. We performed fire experiments with different fire frequencies (annual and biennial, from 2013 to 2017) in open savannas of the Cerrado (Central Brazil). Before each experimental fire, the quantity and distribution of the fuel as well as the moisture content and estimated the percentages of bare soil, dead biomass, and grass cover in the community were evaluated. During the experiments, we measured wind speed, air temperature, and fire behavior parameters, such as flame height, fire propagation rate, flame temperature, and residence time of the fire. Finally, we calculated fire intensity. Annually burned plots showed a lower fuel load and higher percentages of bare soil than biennially burned plots. Regarding the fire parameters, the intensity, flame height, maximum temperatures, and residence time were lower in the annually burned plots than in biennially burned plots. After four years of fire treatment, the annual fire frequency changed the vegetation structure, and the fire parameters responded to these changes. Thus, we conclude that the fuel load distribution influences fire behavior alongside the quantity of fuel in open savannas. The percentage of soil covered by each of the community structural components influences fire temperatures and residence time, which in turn affects fire severity. These findings allow for a more precise evaluation of the fire effects on plant communities facing fire behavior and help in developing better management plans. |
id |
UNSP_10f5a44ffd30cc7e56fb68f29707c0db |
---|---|
oai_identifier_str |
oai:repositorio.unesp.br:11449/205593 |
network_acronym_str |
UNSP |
network_name_str |
Repositório Institucional da UNESP |
repository_id_str |
2946 |
spelling |
Fire frequency affects fire behavior in open savannas of the CerradoFire intensityFire temperaturesFuel load distributionFuel quantityPlant community structureResidence time of fireFire is an environmental factor that helps in shaping plant communities by influencing their structure and function. Frequency is an important component of the fire regime. In tropical savannas, fire frequency is high, mostly owing to the high production and accumulation of fuel, which mainly comprising grasses, the dominant growth form in the Cerrado (Brazilian savanna) open physiognomies. We evaluated how the quantity, quality, and horizontal and vertical distribution of fuel influence fire behavior. We performed fire experiments with different fire frequencies (annual and biennial, from 2013 to 2017) in open savannas of the Cerrado (Central Brazil). Before each experimental fire, the quantity and distribution of the fuel as well as the moisture content and estimated the percentages of bare soil, dead biomass, and grass cover in the community were evaluated. During the experiments, we measured wind speed, air temperature, and fire behavior parameters, such as flame height, fire propagation rate, flame temperature, and residence time of the fire. Finally, we calculated fire intensity. Annually burned plots showed a lower fuel load and higher percentages of bare soil than biennially burned plots. Regarding the fire parameters, the intensity, flame height, maximum temperatures, and residence time were lower in the annually burned plots than in biennially burned plots. After four years of fire treatment, the annual fire frequency changed the vegetation structure, and the fire parameters responded to these changes. Thus, we conclude that the fuel load distribution influences fire behavior alongside the quantity of fuel in open savannas. The percentage of soil covered by each of the community structural components influences fire temperatures and residence time, which in turn affects fire severity. These findings allow for a more precise evaluation of the fire effects on plant communities facing fire behavior and help in developing better management plans.Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Universidade Estadual Paulista (UNESP) Instituto de Biociências Lab of Vegetation Ecology, Av. 24A, 1515Universidade Estadual Paulista (UNESP) Instituto de Biociências Lab of Vegetation Ecology, Av. 24A, 1515CNPq: 130344/2017-6FAPESP: 2015/06743-0FAPESP: 2017/16149-4FAPESP: 2017/22618-7CNPq: 303988/2018-5Universidade Estadual Paulista (Unesp)Rodrigues, Cassy Anne [UNESP]Zirondi, Heloiza Lourenço [UNESP]Fidelis, Alessandra [UNESP]2021-06-25T10:18:01Z2021-06-25T10:18:01Z2021-02-15info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1016/j.foreco.2020.118850Forest Ecology and Management, v. 482.0378-1127http://hdl.handle.net/11449/20559310.1016/j.foreco.2020.1188502-s2.0-85097708877Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengForest Ecology and Managementinfo:eu-repo/semantics/openAccess2021-10-23T15:01:27Zoai:repositorio.unesp.br:11449/205593Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T19:12:05.975401Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Fire frequency affects fire behavior in open savannas of the Cerrado |
title |
Fire frequency affects fire behavior in open savannas of the Cerrado |
spellingShingle |
Fire frequency affects fire behavior in open savannas of the Cerrado Rodrigues, Cassy Anne [UNESP] Fire intensity Fire temperatures Fuel load distribution Fuel quantity Plant community structure Residence time of fire |
title_short |
Fire frequency affects fire behavior in open savannas of the Cerrado |
title_full |
Fire frequency affects fire behavior in open savannas of the Cerrado |
title_fullStr |
Fire frequency affects fire behavior in open savannas of the Cerrado |
title_full_unstemmed |
Fire frequency affects fire behavior in open savannas of the Cerrado |
title_sort |
Fire frequency affects fire behavior in open savannas of the Cerrado |
author |
Rodrigues, Cassy Anne [UNESP] |
author_facet |
Rodrigues, Cassy Anne [UNESP] Zirondi, Heloiza Lourenço [UNESP] Fidelis, Alessandra [UNESP] |
author_role |
author |
author2 |
Zirondi, Heloiza Lourenço [UNESP] Fidelis, Alessandra [UNESP] |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Rodrigues, Cassy Anne [UNESP] Zirondi, Heloiza Lourenço [UNESP] Fidelis, Alessandra [UNESP] |
dc.subject.por.fl_str_mv |
Fire intensity Fire temperatures Fuel load distribution Fuel quantity Plant community structure Residence time of fire |
topic |
Fire intensity Fire temperatures Fuel load distribution Fuel quantity Plant community structure Residence time of fire |
description |
Fire is an environmental factor that helps in shaping plant communities by influencing their structure and function. Frequency is an important component of the fire regime. In tropical savannas, fire frequency is high, mostly owing to the high production and accumulation of fuel, which mainly comprising grasses, the dominant growth form in the Cerrado (Brazilian savanna) open physiognomies. We evaluated how the quantity, quality, and horizontal and vertical distribution of fuel influence fire behavior. We performed fire experiments with different fire frequencies (annual and biennial, from 2013 to 2017) in open savannas of the Cerrado (Central Brazil). Before each experimental fire, the quantity and distribution of the fuel as well as the moisture content and estimated the percentages of bare soil, dead biomass, and grass cover in the community were evaluated. During the experiments, we measured wind speed, air temperature, and fire behavior parameters, such as flame height, fire propagation rate, flame temperature, and residence time of the fire. Finally, we calculated fire intensity. Annually burned plots showed a lower fuel load and higher percentages of bare soil than biennially burned plots. Regarding the fire parameters, the intensity, flame height, maximum temperatures, and residence time were lower in the annually burned plots than in biennially burned plots. After four years of fire treatment, the annual fire frequency changed the vegetation structure, and the fire parameters responded to these changes. Thus, we conclude that the fuel load distribution influences fire behavior alongside the quantity of fuel in open savannas. The percentage of soil covered by each of the community structural components influences fire temperatures and residence time, which in turn affects fire severity. These findings allow for a more precise evaluation of the fire effects on plant communities facing fire behavior and help in developing better management plans. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-06-25T10:18:01Z 2021-06-25T10:18:01Z 2021-02-15 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1016/j.foreco.2020.118850 Forest Ecology and Management, v. 482. 0378-1127 http://hdl.handle.net/11449/205593 10.1016/j.foreco.2020.118850 2-s2.0-85097708877 |
url |
http://dx.doi.org/10.1016/j.foreco.2020.118850 http://hdl.handle.net/11449/205593 |
identifier_str_mv |
Forest Ecology and Management, v. 482. 0378-1127 10.1016/j.foreco.2020.118850 2-s2.0-85097708877 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Forest Ecology and Management |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1808129032819048448 |