Distribution Patterns of Burned Areas in the Brazilian Biomes: An Analysis Based on Satellite Data for the 2002–2010 Period

Araújo, Fernando Moreira de; Ferreira, Laerte Guimarães; Arantes, Arielle Elias

doi:10.3390/rs4071929

Cited by 63 publications

(34 citation statements)

References 58 publications

(42 reference statements)

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“…September was the month with the highest frequency of active fires, followed by October, and they are concentrated in the northern part of the Cerrado, corroborating previous studies [7,42,43]. L8 images were then selected according to the period of highest fire activity and lowest cloud cover.…”

Section: Study Area and Datamentioning

confidence: 70%

“…According to Koppen's classification [41], the Cerrado climate is Equatorial savanna with dry winter (Aw), characterized by dry winters and monthly mean temperatures above 18 • C. The biome has a marked dry season from May to September when the region becomes susceptible to fire events with an annual fire occurrence peak in September [7,42,43]. The region is considered a pyrobiome [33] because it is a fire-dependent ecosystem, where the majority of the species evolved in the presence of fire.…”

Section: Study Area and Datamentioning

confidence: 99%

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Burned Area Mapping in the Brazilian Savanna Using a One-Class Support Vector Machine Trained by Active Fires

Pereira

Libonati

et al. 2017

Remote Sensing

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Abstract:We used the Visible Infrared Imaging Radiometer Suite (VIIRS) active fire data (375 m spatial resolution) to automatically extract multispectral samples and train a One-Class Support Vector Machine for burned area mapping, and applied the resulting classification algorithm to 300-m spatial resolution imagery from the Project for On-Board Autonomy-Vegetation (PROBA-V). The active fire data were screened to prevent extraction of unrepresentative burned area samples and combined with surface reflectance bi-weekly composites to produce burned area maps. The procedure was applied over the Brazilian Cerrado savanna, validated with reference maps obtained from Landsat images and compared with the Collection 6 Moderate Resolution Imaging Spectrometer (MODIS) Burned Area product (MCD64A1) Results show that the algorithm developed improved the detection of small-sized scars and displayed results more similar to the reference data than MCD64A1. Unlike active fire-based region growing algorithms, the proposed approach allows for the detection and mapping of burn scars without active fires, thus eliminating a potential source of omission error. The burned area mapping approach presented here should facilitate the development of operational-automated burned area algorithms, and is very straightforward for implementation with other sensors.

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Section: Study Area and Datamentioning

confidence: 70%

Section: Study Area and Datamentioning

confidence: 99%

Burned Area Mapping in the Brazilian Savanna Using a One-Class Support Vector Machine Trained by Active Fires

Pereira

Libonati

et al. 2017

Remote Sensing

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“…Therefore, the natural fire regime in Cerrado has been modified by human activities, leading to more frequent and severe fires late in the dry season, when the environment contains more fuel and less moisture (Mistry, 1998;Miranda et al, 2002). Brazil concentrates most of the total fires that occur in South America (63% of all fire pixels, Di Bella et al, 2006) and the Cerrado presents the largest concentration of fires in Brazil (73%, Araújo et al, 2012). As fire has occurred naturally for millennia in Cerrado (Miranda et al, 2009;Simon et al, 2009), it is expected that its fauna is fire-adapted, but very little is known about the effects of altered fire regimes upon animal populations in Cerrado (Redford and Fonseca, 1986;Coutinho, 1990).…”

Section: Introductionmentioning

confidence: 99%

Fire Regimes and the Demography of the LizardMicrablepharus atticolus(Squamata, Gymnophthalmidae) in a Biodiversity Hotspot

Sousa

Soares

Costa

et al. 2015

South American Journal of Herpetology

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Disturbance caused by anthropogenic fires are increasingly affecting the biodiversity of fire-prone ecosystems worldwide. The Cerrado biodiversity hotspot suffers higher deforestation rates than Amazonia and concentrates most of the burned areas in South America. To support adequate fire-management decisions in Cerrado, knowledge on the effects of altered fire regimes upon its animal populations is necessary. Based on a long-term, large-scale fire experiment, we investigated the effects of different fire regimes on the demography of the gymnophthalmid Micrablepharus atticolus, an endemic lizard of the Cerrado. Because M. atticolus is more abundant in open habitats, we predicted that frequent burns should favor its populations. Over eight years, we conducted a mark-recapture study using pitfall trap arrays in five 10 ha plots of cerrado sensu stricto, subjected to prescribed burns. Using generalized linear mixed-models of time series data and an information theoretic approach to select demographic models, we describe the life history of M. atticolus and assess the response of apparent survival, detectability, and recruitment to burn regimes and climate variation. Micrablepharus atticolus has an annual life cycle, with complete annual population turnover; breeding takes place during the dry season, when activity is higher, and hatchlings appear in the wet season. Apparent survival, detectability, and recruitment increased in the short-run after the passage of fire in all experimental plots. In the long run, however, both fire-suppression and more severe fire regimes were seemingly detrimental, presumably by affecting microclimatic conditions and food availability. Short-term studies may not adequately describe the effects of fire on the demography of lizard populations. Adequate fire management is warranted for biodiversity conservation in Cerrado, both inside and outside protected areas, including a reduction in the frequency and severity of burns in open physiognomies and controlled, patch mosaic fires to prevent excessive fuel accumulation in denser physiognomies. Fire Regimes and the Demography of the Lizard Micrablepharus atticolus (Squamata, Gymnophthalmidae) in a . 2012. Adaptive responses and disruptive effects: how major wildfire influences kinship-based social interactions in a forest marsupial. Molecular Ecology 21:673-684. : Multi-model inference. Available from: http://CRAN.R-project.org/package=MuMIn. Bates D., Maechler M., Bolker B., Walker S. 2014. lme4: Linear mixed-effects models using Eigen and S4. Available from: http:// CRAN.R-project.org/package=lme4.

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“…Over the last decade, pervasive forest clearing using fire in this area has led to substantial burned-over forest fragments (Moreira de Araújo et al 2012). From 1999 to 2010, the amount of understory area that burned within 500 m of a deforestation event ranged from 25 to 46 % during years with high deforestation rates (Morton et al 2013).…”

Section: Introductionmentioning

confidence: 99%

“…Among the most important of these global change variables in dry tropical forests is increasing fire frequency resulting from agricultural burning and stronger and more frequent droughts (Cochrane and Laurance 2002;Moreira de Araújo et al 2012;Wooster et al 2012).…”

Section: Introductionmentioning

confidence: 99%

Early recruitment responses to interactions between frequent fires, nutrients, and herbivory in the southern Amazon

et al. 2015

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Understanding tropical forest diversity is a long-standing challenge in ecology. With global change, it has become increasingly important to understand how anthropogenic and natural factors interact to determine diversity. Anthropogenic increases in fire frequency are among the global change variables affecting forest diversity and functioning, and seasonally dry forest of the southern Amazon is among the ecosystems most affected by such pressures. Studying how fire will impact forests in this region is therefore important for understanding ecosystem functioning and for designing effective conservation action. We report the results of an experiment in which we manipulated fire, nutrient availability, and herbivory. We measured the effects of these interacting factors on the regenerative capacity of the ecotone between humid Amazon forest and Brazilian savanna. Regeneration density, diversity, and community composition were severely altered by fire. Additions of P and N + P reduced losses of density and richness in the first year post-fire. Herbivory was most important just after germination. Diversity was positively correlated with herbivory in unburned forest, likely because fire reduced the number of reproductive individuals. This contrasts with earlier results from the same study system in which herbivory was related to increased diversity after fire. We documented a significant effect of fire frequency; diversity in triennially burned forest was more similar to that in unburned than in annually burned forest, and the community composition of triennially burned forest was intermediate between unburned and annually burned areas. Preventing frequent fires will therefore help reduce losses in diversity in the southern Amazon’s matrix of humanaltered landscapes

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Distribution Patterns of Burned Areas in the Brazilian Biomes: An Analysis Based on Satellite Data for the 2002–2010 Period

Cited by 63 publications

References 58 publications

Burned Area Mapping in the Brazilian Savanna Using a One-Class Support Vector Machine Trained by Active Fires

Burned Area Mapping in the Brazilian Savanna Using a One-Class Support Vector Machine Trained by Active Fires

Fire Regimes and the Demography of the LizardMicrablepharus atticolus(Squamata, Gymnophthalmidae) in a Biodiversity Hotspot

Early recruitment responses to interactions between frequent fires, nutrients, and herbivory in the southern Amazon

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