Management impacts on fire occurrence: A comparison of fire regimes of African and South American tropical savannas in different protected areas
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.jenvman.2018.04.004 http://hdl.handle.net/11449/170895 |
Resumo: | Humans can alter fire dynamics in grassland systems by changing fire frequency, fire seasonality and fuel conditions. These changes have effects on vegetation structure and recovery, species composition, and ecosystem function. Understanding how human management can affect fire regimes is vital to detect potential changes in the resilience of plant communities, and to predict vegetation responses to human interventions. We evaluated the fire regimes of two recently protected areas in Madagascar (Ibity and Itremo NPA) and one in Brazil (Serra do Cipó NP) before and after livestock exclusion and fire suppression policies. We compare the pre- and post-management fire history in these areas and analyze differences in terms of total annual burned area, density of ignitions, burn scar size distribution, fire return period and seasonal fire distribution. More than 90% of total park areas were burned at least once during the studied period, for all parks. We observed a significant reduction in the number of ignitions for Ibity NPA and Serra do Cipó NP after livestock exclusion and active fire suppression, but no significant change in total burned area for each protected area. We also observed a seasonal shift in burning, with fires happening later in the fire season (October–November) after management intervention. However, the protected areas in Madagascar had shorter fire return intervals (3.23 and 1.82 years) than those in Brazil (7.91 years). Our results demonstrate that fire exclusion is unattainable, and probably unwarranted in tropical grassland conservation areas, but show how human intervention in fire and vegetation patterns can alter various aspects of the fire regimes. This information can help with formulating realistic and effective fire management policies in these valuable conservation areas. |
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Management impacts on fire occurrence: A comparison of fire regimes of African and South American tropical savannas in different protected areasBurn scar size distributionBurned areaFire regimeFire return periodManagement interventionNumber of ignitionsSeasonal fire distributionHumans can alter fire dynamics in grassland systems by changing fire frequency, fire seasonality and fuel conditions. These changes have effects on vegetation structure and recovery, species composition, and ecosystem function. Understanding how human management can affect fire regimes is vital to detect potential changes in the resilience of plant communities, and to predict vegetation responses to human interventions. We evaluated the fire regimes of two recently protected areas in Madagascar (Ibity and Itremo NPA) and one in Brazil (Serra do Cipó NP) before and after livestock exclusion and fire suppression policies. We compare the pre- and post-management fire history in these areas and analyze differences in terms of total annual burned area, density of ignitions, burn scar size distribution, fire return period and seasonal fire distribution. More than 90% of total park areas were burned at least once during the studied period, for all parks. We observed a significant reduction in the number of ignitions for Ibity NPA and Serra do Cipó NP after livestock exclusion and active fire suppression, but no significant change in total burned area for each protected area. We also observed a seasonal shift in burning, with fires happening later in the fire season (October–November) after management intervention. However, the protected areas in Madagascar had shorter fire return intervals (3.23 and 1.82 years) than those in Brazil (7.91 years). Our results demonstrate that fire exclusion is unattainable, and probably unwarranted in tropical grassland conservation areas, but show how human intervention in fire and vegetation patterns can alter various aspects of the fire regimes. This information can help with formulating realistic and effective fire management policies in these valuable conservation areas.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Universidade Estadual Paulista (Unesp) Instituto de Geociências e Ciências Exatas Ecosystem Dynamics Observatory, Avenida 24-A 1515Centre for African Ecology School of Animal Plant and Environmental Sciences University of the Witwatersrand, Private Bag X3, WITSUniversidade Estadual Paulista (Unesp) Instituto de Geociências e Ciências Exatas Ecosystem Dynamics Observatory, Avenida 24-A 1515FAPESP: #2014/12728-1FAPESP: #2016/00879-0CNPq: #310144/2015-9Universidade Estadual Paulista (Unesp)University of the WitwatersrandAlvarado, Swanni T. [UNESP]Silva, Thiago Sanna Freire [UNESP]Archibald, Sally2018-12-11T16:52:50Z2018-12-11T16:52:50Z2018-07-15info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article79-87application/pdfhttp://dx.doi.org/10.1016/j.jenvman.2018.04.004Journal of Environmental Management, v. 218, p. 79-87.1095-86300301-4797http://hdl.handle.net/11449/17089510.1016/j.jenvman.2018.04.0042-s2.0-850454498032-s2.0-85045449803.pdfScopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal of Environmental Management1,1611,161info:eu-repo/semantics/openAccess2023-10-22T06:06:02Zoai:repositorio.unesp.br:11449/170895Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462023-10-22T06:06:02Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Management impacts on fire occurrence: A comparison of fire regimes of African and South American tropical savannas in different protected areas |
title |
Management impacts on fire occurrence: A comparison of fire regimes of African and South American tropical savannas in different protected areas |
spellingShingle |
Management impacts on fire occurrence: A comparison of fire regimes of African and South American tropical savannas in different protected areas Alvarado, Swanni T. [UNESP] Burn scar size distribution Burned area Fire regime Fire return period Management intervention Number of ignitions Seasonal fire distribution |
title_short |
Management impacts on fire occurrence: A comparison of fire regimes of African and South American tropical savannas in different protected areas |
title_full |
Management impacts on fire occurrence: A comparison of fire regimes of African and South American tropical savannas in different protected areas |
title_fullStr |
Management impacts on fire occurrence: A comparison of fire regimes of African and South American tropical savannas in different protected areas |
title_full_unstemmed |
Management impacts on fire occurrence: A comparison of fire regimes of African and South American tropical savannas in different protected areas |
title_sort |
Management impacts on fire occurrence: A comparison of fire regimes of African and South American tropical savannas in different protected areas |
author |
Alvarado, Swanni T. [UNESP] |
author_facet |
Alvarado, Swanni T. [UNESP] Silva, Thiago Sanna Freire [UNESP] Archibald, Sally |
author_role |
author |
author2 |
Silva, Thiago Sanna Freire [UNESP] Archibald, Sally |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) University of the Witwatersrand |
dc.contributor.author.fl_str_mv |
Alvarado, Swanni T. [UNESP] Silva, Thiago Sanna Freire [UNESP] Archibald, Sally |
dc.subject.por.fl_str_mv |
Burn scar size distribution Burned area Fire regime Fire return period Management intervention Number of ignitions Seasonal fire distribution |
topic |
Burn scar size distribution Burned area Fire regime Fire return period Management intervention Number of ignitions Seasonal fire distribution |
description |
Humans can alter fire dynamics in grassland systems by changing fire frequency, fire seasonality and fuel conditions. These changes have effects on vegetation structure and recovery, species composition, and ecosystem function. Understanding how human management can affect fire regimes is vital to detect potential changes in the resilience of plant communities, and to predict vegetation responses to human interventions. We evaluated the fire regimes of two recently protected areas in Madagascar (Ibity and Itremo NPA) and one in Brazil (Serra do Cipó NP) before and after livestock exclusion and fire suppression policies. We compare the pre- and post-management fire history in these areas and analyze differences in terms of total annual burned area, density of ignitions, burn scar size distribution, fire return period and seasonal fire distribution. More than 90% of total park areas were burned at least once during the studied period, for all parks. We observed a significant reduction in the number of ignitions for Ibity NPA and Serra do Cipó NP after livestock exclusion and active fire suppression, but no significant change in total burned area for each protected area. We also observed a seasonal shift in burning, with fires happening later in the fire season (October–November) after management intervention. However, the protected areas in Madagascar had shorter fire return intervals (3.23 and 1.82 years) than those in Brazil (7.91 years). Our results demonstrate that fire exclusion is unattainable, and probably unwarranted in tropical grassland conservation areas, but show how human intervention in fire and vegetation patterns can alter various aspects of the fire regimes. This information can help with formulating realistic and effective fire management policies in these valuable conservation areas. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-12-11T16:52:50Z 2018-12-11T16:52:50Z 2018-07-15 |
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.jenvman.2018.04.004 Journal of Environmental Management, v. 218, p. 79-87. 1095-8630 0301-4797 http://hdl.handle.net/11449/170895 10.1016/j.jenvman.2018.04.004 2-s2.0-85045449803 2-s2.0-85045449803.pdf |
url |
http://dx.doi.org/10.1016/j.jenvman.2018.04.004 http://hdl.handle.net/11449/170895 |
identifier_str_mv |
Journal of Environmental Management, v. 218, p. 79-87. 1095-8630 0301-4797 10.1016/j.jenvman.2018.04.004 2-s2.0-85045449803 2-s2.0-85045449803.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Journal of Environmental Management 1,161 1,161 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
79-87 application/pdf |
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_ |
1803046099157516288 |