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Modelling Fire Frequency in a Cerrado Savanna Protected Area
Covering almost a quarter of Brazil, the Cerrado is the world’s most biologically rich tropical savanna. Fire is an integral part of the Cerrado but current land use and agricultural practices have been changing fire regimes, with undesirable consequences for the preservation of biodiversity. In thi...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Public Library of Science
2014
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4108356/ https://www.ncbi.nlm.nih.gov/pubmed/25054540 http://dx.doi.org/10.1371/journal.pone.0102380 |
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author | Pereira Júnior, Alfredo C. Oliveira, Sofia L. J. Pereira, José M. C. Turkman, Maria Antónia Amaral |
author_facet | Pereira Júnior, Alfredo C. Oliveira, Sofia L. J. Pereira, José M. C. Turkman, Maria Antónia Amaral |
author_sort | Pereira Júnior, Alfredo C. |
collection | PubMed |
description | Covering almost a quarter of Brazil, the Cerrado is the world’s most biologically rich tropical savanna. Fire is an integral part of the Cerrado but current land use and agricultural practices have been changing fire regimes, with undesirable consequences for the preservation of biodiversity. In this study, fire frequency and fire return intervals were modelled over a 12-year time series (1997–2008) for the Jalapão State Park, a protected area in the north of the Cerrado, based on burned area maps derived from Landsat imagery. Burned areas were classified using object based image analysis. Fire data were modelled with the discrete lognormal model and the estimated parameters were used to calculate fire interval, fire survival and hazard of burning distributions, for seven major land cover types. Over the study period, an area equivalent to four times the size of Jalapão State Park burned and the mean annual area burned was 34%. Median fire intervals were generally short, ranging from three to six years. Shrub savannas had the shortest fire intervals, and dense woodlands the longest. Because fires in the Cerrado are strongly responsive to fuel age in the first three to four years following a fire, early dry season patch mosaic burning may be used to reduce the extent of area burned and the severity of fire effects. |
format | Online Article Text |
id | pubmed-4108356 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2014 |
publisher | Public Library of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-41083562014-07-24 Modelling Fire Frequency in a Cerrado Savanna Protected Area Pereira Júnior, Alfredo C. Oliveira, Sofia L. J. Pereira, José M. C. Turkman, Maria Antónia Amaral PLoS One Research Article Covering almost a quarter of Brazil, the Cerrado is the world’s most biologically rich tropical savanna. Fire is an integral part of the Cerrado but current land use and agricultural practices have been changing fire regimes, with undesirable consequences for the preservation of biodiversity. In this study, fire frequency and fire return intervals were modelled over a 12-year time series (1997–2008) for the Jalapão State Park, a protected area in the north of the Cerrado, based on burned area maps derived from Landsat imagery. Burned areas were classified using object based image analysis. Fire data were modelled with the discrete lognormal model and the estimated parameters were used to calculate fire interval, fire survival and hazard of burning distributions, for seven major land cover types. Over the study period, an area equivalent to four times the size of Jalapão State Park burned and the mean annual area burned was 34%. Median fire intervals were generally short, ranging from three to six years. Shrub savannas had the shortest fire intervals, and dense woodlands the longest. Because fires in the Cerrado are strongly responsive to fuel age in the first three to four years following a fire, early dry season patch mosaic burning may be used to reduce the extent of area burned and the severity of fire effects. Public Library of Science 2014-07-23 /pmc/articles/PMC4108356/ /pubmed/25054540 http://dx.doi.org/10.1371/journal.pone.0102380 Text en © 2014 Pereira Júnior et al http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited. |
spellingShingle | Research Article Pereira Júnior, Alfredo C. Oliveira, Sofia L. J. Pereira, José M. C. Turkman, Maria Antónia Amaral Modelling Fire Frequency in a Cerrado Savanna Protected Area |
title | Modelling Fire Frequency in a Cerrado Savanna Protected Area |
title_full | Modelling Fire Frequency in a Cerrado Savanna Protected Area |
title_fullStr | Modelling Fire Frequency in a Cerrado Savanna Protected Area |
title_full_unstemmed | Modelling Fire Frequency in a Cerrado Savanna Protected Area |
title_short | Modelling Fire Frequency in a Cerrado Savanna Protected Area |
title_sort | modelling fire frequency in a cerrado savanna protected area |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4108356/ https://www.ncbi.nlm.nih.gov/pubmed/25054540 http://dx.doi.org/10.1371/journal.pone.0102380 |
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