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Marisa Gesteira Fonseca

Marisa Gesteira Fonseca

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34
Publications
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1,747
Citations

Publications

Publications (34)
Article
Fragmented tropical forest landscapes preserve much of the remaining biodiversity and carbon stocks. Climate change is expected to intensify droughts and increase fire hazard and fire intensities, thereby causing habitat deterioration, and losses of biodiversity and carbon stock losses. Understanding the trajectories that these landscapes may follo...
Poster
Full-text available
Deforestation is the primary driver of forest carbon loss in tropical forests. Nevertheless, forest fragmentation-induced carbon loss is poorly studied and not implicitly included in the policies of reductions in carbon emissions in the tropics. Here, we used an innovative remote sensing approach to estimate for the first time the carbon loss due t...
Article
Full-text available
Deforestation is the primary driver of carbon losses in tropical forests, but it does not operate alone. Forest fragmentation, a resulting feature of the deforestation process, promotes indirect carbon losses induced by edge effect. This process is not implicitly considered by policies for reducing carbon emissions in the tropics. Here, we used a r...
Article
Full-text available
The Atlantic rainforest of Brazil is one of the global terrestrial hotspots of biodiversity. Despite having undergone large scale deforestation, forest cover has shown signs of increases in the last decades. Here, to understand the degradation and regeneration history of Atlantic rainforest remnants near São Paulo, we combine a unique dataset of ve...
Article
The joint and relative effects of future land‐use and climate change on fire occurrence in the Amazon, as well its seasonal variation, are still poorly understood, despite its recognized importance. Using the maximum entropy method (MaxEnt), we combined regional land‐use projections and climatic data from the CMIP5 multimodel ensemble to investigat...
Conference Paper
Full-text available
Forest fires are a key challenge for reducing the carbon emissions and ecosystem services preservation in the Brazilian Amazon. The analysis of the spatial location and land-use associated with each fire ignition is important to guide policies aiming the mitigation of forest fires. In this study, we assessed the spatial relationship between the ign...
Conference Paper
Full-text available
Deforestation-induced fragmentation has increased forest edges in Amazon forests. However, the dynamics of fires in these fragmented forest areas is poorly known in this region. To fill this gap, our work aimed to analyse the dynamics of fire in the forest edges in the South of the Amazon Basin. To achieve the proposed aim, we used a remote sensing...
Preprint
Full-text available
Forest fires are a key challenge for reducing the carbon emissions and ecosystem services preservation in the Brazilian Amazon. The analysis of the spatial location and land-use associated with each fire ignition is important to guide policies aiming the mitigation of forest fires. In this study, we assessed the spatial relationship between the ign...
Preprint
Full-text available
Deforestation-induced fragmentation has increased forest edges in Amazon forests. However, the dynamics of fires in these fragmented forest areas is poorly known in this region. To fill this gap, our work aimed to analyse the dynamics of fire in the forest edges in the South of the Amazon Basin. To achieve the proposed aim, we used a remote sensing...
Article
Full-text available
Extreme droughts have been recurrent in the Amazon over the past decades, causing socio-economic and environmental impacts. Here, we investigate the vulnerability of Amazonian forests, both undisturbed and human-modified, to repeated droughts. We defined vulnerability as a measure of (i) exposure, which is the degree to which these ecosystems were...
Article
Full-text available
Amazonia is home to more than half of the world’s remaining tropical forests, playing a key role as reservoirs of carbon and biodiversity. However, whether at a slower or faster pace, continued deforestation causes forest fragmentation in this region. Thus, understanding the relationship between forest fragmentation and fire incidence and intensity...
Article
Full-text available
Tropical carbon emissions are largely derived from direct forest clearing processes. Yet, emissions from drought-induced forest fires are, usually, not included in national-level carbon emission inventories. Here we examine Brazilian Amazon drought impacts on fire incidence and associated forest fire carbon emissions over the period 2003–2015. We s...
Chapter
The 280,000 km² of indigenous lands and protected areas (ILPAs) of the Xingu river basin form a continuous forest corridor inhabited by 25 indigenous peoples and about 185 riverine (ribeirinho) families. Spanning one of the world's most intense deforestation zones in Pará and Mato Grosso states, the Xingu ILPAs exemplify how Brazilian government po...
Article
Full-text available
The Amazon has been experiencing the increase in the intensity and occurrence of extreme weather events. The occurrence of droughts in this region increases the forest susceptibility to fires, with consequences for the environment, economy and human health. The objective of this study was to provide a spatio-temporal analysis of fire use in Acre St...
Article
The strong El Niño Southern Oscillation (ENSO) event that occurred in 2015/2016 caused extreme drought in the northern Brazilian Amazon, especially in the state of Roraima, increasing fire occurrence. Here we map the extent of precipitation and fire anomalies and quantify the effects of climatic and anthropogenic drivers on fire occurrence during t...
Article
This article reviews the current status, trends and challenges of land system science in Latin America. We highlight the advances in the conceptualization, analysis and monitoring of land systems. These advances shift from a focus on the relationships between forests and other land uses to include a greater diversity of land cover and land-use type...
Article
Despite a 79% reduction in deforestation rates since 2004 in the Brazilian Amazon, the current gross forest loss of 6207 km2 year−1 remains significant, promoting continuous habitat fragmentation. This study assessed the status of forest fragmentation in 2014 across the Brazilian Amazon applying a Morphological Spatial Pattern Analysis (MSPA). Our...
Article
Fires are both a cause and consequence of important changes in the Amazon region. The development and implementation of better fire management practices and firefighting strategies are important steps to reduce the Amazon ecosystems' degradation and carbon emissions from land-use change in the region. We extended the application of the maximum entr...
Conference Paper
Full-text available
Climate change, forest fragmentation, and the increase in secondary vegetation cover are expected to amplify fire incidence in the Amazon. The negative impacts of forest fires on biodiversity, precipitation and the dynamics of atmospheric circulation, human health, forest structure, biomass and carbon stock have been recognized in the literature. T...
Article
Full-text available
The 280 000 km² Xingu indigenous lands and protected areas (ILPAs) corridor, inhabited by 24 indigenous peoples and about 215 riverine (ribeirinho) families, lies across active agriculture frontiers in some of the historically highest-deforestation regions of the Amazon. Much of the Xingu is anthropogenic landscape, densely inhabited and manag...
Article
Information concerning the fruit production of timber species is important for the assessment of the effects of logging practices and for the improvement of harvesting techniques. We assessed the effects of stem diameter, crown illumination, and liana load on Chrysophyllum lucentifolium subsp. pachycarpum fruiting over a 3-yr period in areas subjec...
Article
Full-text available
Studies concerning the reproductive ecology of trees are important so as to better understand the impacts of logging and for the definition of guidelines to improve management practices. The aim of this study was to estimate (1) the number and proportion of reproductive individuals of Chrysophyllum lucentifolium subsp. pachycarpum, Lecythis lurida...
Article
Full-text available
Studies concerning the reproductive ecology of trees are important so as to better understand the impacts of logging and for the definition of guidelines to improve management practices. The aim of this study was to estimate (1) the number and proportion of reproductive individuals of Chrysophyllum lucentifolium subsp. pachycarpum, Lecythis lurida...
Article
Full-text available
A expansão da atividade madeireira e a elevada taxa de desmatamento na Amazônia têm intensificado a necessidade de estudos sobre as técnicas mais adequadas para a produção de mudas que possam ser usadas em atividades de reflorestamento e de plantio em florestas. Este estudo teve como objetivo avaliar: a) se a taxa de germinação de sementes de Pseud...
Article
. Description of the spatial structure of vegetation is the first step in generating hypotheses regarding underlying processes. It is also important to take into account variation in spatial structure between different localities to be able to distinguish between life history traits and the influence of environment on population processes. Correlog...
Article
Description of the spatial structure of vegetation is the first step in generating hypotheses regarding underlying processes. It is also important to take into account variation in spatial structure between different localities to be able to distinguish between life history traits and the influence of environment on population processes. Correlogra...
Article
Full-text available
RESUMO ñ A expansªo da atividade madeireira e a elevada taxa de desmatamento na AmazÙnia tŒm intensificado a necessidade de estudos sobre as tØcnicas mais adequadas para a produÁªo de mudas que possam ser usadas em atividades de reflorestamento e de plantio em florestas. Este estudo teve como objetivo avaliar: a) se a taxa de germinaÁªo de sementes...
Article
1. INTRODUÇÃO As interações organismo-ambiente são profundamente influenciadas pela capacidade de dispersão desses. Os organismos móveis podem procurar ativamente por partes do ambiente mais favoráveis para a sobrevivência e reprodução. No entanto, organismos sésseis não têm essa flexibilidade, o que torna a colonização de substratos mais favorávei...

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