A5060189991- Fire effects on ecosystems
- Forest ecology and management
- Remote Sensing in Agriculture
- Plant Water Relations and Carbon Dynamics
- Ecology and Vegetation Dynamics Studies
- Atmospheric and Environmental Gas Dynamics
- Remote Sensing and LiDAR Applications
- Species Distribution and Climate Change
- Conservation, Biodiversity, and Resource Management
- Plant and animal studies
- Tree-ring climate responses
- Land Use and Ecosystem Services
- Geochemistry and Geologic Mapping
- Energy and Environment Impacts
- Child Nutrition and Water Access
- Agroforestry and silvopastoral systems
- Indigenous Health and Education
- Economic and Environmental Valuation
- Bamboo properties and applications
- Soil Management and Crop Yield
- Mosquito-borne diseases and control
Instituto de Pesquisa Ambiental da Amazônia
2021-2025
Lancaster University
2018-2024
Amazon Research Foundation
2021
National Institute for Space Research
2016-2018
Tropical carbon emissions are largely derived from direct forest clearing processes. Yet, drought-induced fires are, usually, not included in national-level emission inventories. Here we examine Brazilian Amazon drought impacts on fire incidence and associated over the period 2003-2015. We show that despite a 76% decline deforestation rates past 13 years, increased by 36% during 2015 compared to preceding 12 years. The had largest ever ratio of active counts deforestation, with occurring an...
Drought-induced wildfires have increased in frequency and extent over the tropics. Yet, long-term (greater than 10 years) responses of Amazonian lowland forests to fire disturbance are poorly known. To understand post-fire forest biomass dynamics, assess time required for fire-affected recover pre-disturbance levels, we combined 16 single with 182 multiple census into a unique large-scale dataset across Brazilian Amazonia. We quantified biomass, mortality wood productivity burned plots along...
Wildfires produce substantial CO2 emissions in the humid tropics during El Niño-mediated extreme droughts, and these are expected to increase coming decades. Immediate carbon from uncontrolled wildfires human-modified tropical forests can be considerable owing high necromass fuel loads. Yet, data on combustion severely lacking. Here, we evaluated stocks before after 2015-2016 Niño Amazonian distributed along a gradient of prior human disturbance. We then used Landsat-derived burn scars...
Objective: To estimate the incidence, mortality and lethality rates of COVID-19 among Indigenous Peoples in Brazilian Amazon. Additionally, to analyze how external threats can contribute spread disease Lands (IL). Methods: The Amazon is home nearly half a million persons, representing more than 170 ethnic groups. As pioneer heading community-based surveillance (I-CBS) Brazil, Coordination Organizations (COIAB) started monitor cases March 2020. Brazil's Ministry Health (MOH) was main source...
Abstract Wildfires in humid tropical forests have become more common recent years, increasing the rates of tree mortality that not co-evolved with fire. Estimating carbon emissions from these wildfires is complex. Current approaches rely on estimates committed based static emission factors through time and space, yet cannot be assigned to specific thus are comparable other temporally-explicit sources. Moreover, gross estimates, whereas long-term consequences require an understanding net...
While the climate and human-induced forest degradation is increasing in Amazon, fire impacts on dynamics remain understudied wetter regions of basin, which are susceptible to large wildfires only during extreme droughts. To address this gap, we installed burned unburned plots immediately after a wildfire northern Purus-Madeira (Central Amazon) 2015 El-Niño. We measured all individuals with diameter 10 cm or more at breast height conducted recensuses track demographic drivers biomass change...
Abstract Aim Water availability is the major driver of tropical forest structure and dynamics. Most research has focused on impacts climatic water availability, whereas remarkably little known about influence table depth excess soil processes. Nevertheless, given that plants take up from soil, supply are likely to be modulated by conditions. Location Lowland Amazonian forests. Time period 1971–2019. Methods We used 344 long‐term inventory plots distributed across Amazonia analyse effects...
Carbon (C) emissions from forest fires in the Amazon during extreme droughts may correspond to more than half of global resulting land cover changes. Despite their relevant contribution, fire-related C are not directly accounted for within national-level inventories or carbon budgets. A fundamental condition quantifying these is have a reliable estimation extent and location types affected by fires. Here, we evaluated relative performance four burned area products (TREES, MCD64A1 c6, GABAM,...
Fire is a major forest degradation component in the Amazon forests. Therefore, it important to improve our understanding of how post-fire canopy structure changes cascade through spectral signals registered by medium-resolution satellite sensors over time. We contrasted accumulated yearly temporal aboveground biomass (AGB), measured permanent plots, and traditional indices derived from Landsat-8 images. tested if can Random Forest (RF) models AGB losses based on pre-fire AGB, proxied data...
ABSTRACT The analysis of changes in species composition and vegetation structure chronosequences improves knowledge on the regeneration patterns following land abandonment Amazon. Here, objective was to perform floristic-structural mature forests (with/without timber exploitation) secondary successions (initial, intermediate advanced regrowth) Tapajós region. regrowth age plot locations were determined using Landsat-5/Thematic Mapper images (1984-2012). For floristic analysis, we sample...
Secondary forests (SF) are important carbon sinks, removing CO2 from the atmosphere through photosynthesis process and storing photosynthates in their aboveground live biomass (AGB). This occurring at large-scales partially counteracts C emissions land-use change, playing, hence, an role global cycle. The absorption rates of these depend on forest physiology, controlled by environmental climatic conditions, as well past land use, which is rarely considered for retrieving AGB remotely sensed...
Secondary forests (SF) are important carbon sinks, removing CO2 from the atmosphere through photosynthesis process and storing photosynthates in their aboveground live biomass (AGB). This occurring at large-scales partially counteracts C emissions land-use change, playing, hence, an role global cycle. The absorption rates of these depend on forest physiology, controlled by environmental climatic conditions as well past land use, which is rarely considered for retrieving AGB remotely sensed...
The Brazilian Amazonian Forest is undergoing significant changes in land use and cover the last few decades. This land-use transition, besides climate change, may be responsible for fire regime transition this territory. Therefore, we aimed at investigating how fire-transition occurs over time Amazonia identifying key parameters that can help to predict change. For this, collected yearly data on occurrence, forest cover, deforestation rates, cropland areas. We used a 0.45° spatial surface...
Drought and fire reduce productivity increase tree mortality in tropical forests. Fires also produce pyrogenic carbon (PyC), which persists situ for centuries to millennia, represents a legacy of past fires, potentially improving soil fertility water holding capacity selecting the survival recruitment certain life-history (or successional) strategies. We investigated whether PyC is correlated with physicochemical properties, wood density, aboveground (AGC) dynamics forest resistance severe...
Abstract The Amazon is the largest continuous tropical forest in world and plays a key role global carbon cycle. Human-induced disturbances climate change have impacted balance. Here we conduct comprehensive analysis of state-of-the-art estimates contemporary land fluxes Amazon. Over whole region bottom-up methodologies suggest small average sink over 2010-2020, contrast with source simulated by top-down inversions (2010-2018). However, these are not significantly different from one another...
Severe droughts increase the forest flammability, especially if fires are recurrent. Considering that tend to alter structure and reduce biological diversity, we analyzed fire effect on tree plant community over a 10-year post-fire period. The study was carried out in two tropical fragments located eastern Acre State southwestern Brazilian Amazon. In each fragment, established three plots of 250 × 10 m2 an unburned burned forest. these plots, collected all individuals with DBH≥10 following...