Julia Valentim Tavares
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View article: Protecting Indigenous Territories is Critical to Water and Food Security in Much of Brazil
Protecting Indigenous Territories is Critical to Water and Food Security in Much of Brazil Open
The Amazonian Indigenous Territories play a crucial role in generating the rainfall that supports 80% of Brazil’s agricultural activities. This occurs through “flying rivers”, where moisture recycled in the forests of these lands is transp…
View article: Rainfall and topographic position determine tree embolism resistance in Amazônia and Cerrado sites
Rainfall and topographic position determine tree embolism resistance in Amazônia and Cerrado sites Open
Droughts are predicted to increase in both frequency and intensity by the end of the 21st century, but ecosystem response is not expected to be uniform across landscapes. Here we assess the importance of the hill-to-valley hydrologic gradi…
View article: Tropical forest lianas have greater non-structural carbohydrate concentrations in the stem xylem than trees
Tropical forest lianas have greater non-structural carbohydrate concentrations in the stem xylem than trees Open
Lianas (woody vines) are important components of tropical forests and are known to compete with host trees for resources, decrease tree growth and increase tree mortality. Given the observed increases in liana abundance in some forests and…
View article: Basin-wide variation in tree hydraulic safety margins predicts the carbon balance of Amazon forests
Basin-wide variation in tree hydraulic safety margins predicts the carbon balance of Amazon forests Open
View article: HYDRAULIC TRAITS OF Jacaranda copaia (Aubl.) D. Don. (Bignoniaceae) IN THE SOUTHWEST AMAZON
HYDRAULIC TRAITS OF Jacaranda copaia (Aubl.) D. Don. (Bignoniaceae) IN THE SOUTHWEST AMAZON Open
Trees transport water from underground to the atmosphere through the evapotranspiration process. Climate change can significantly compromise this process due to changes in land use, such as deforestation. This study aimed to characterize t…
View article: Background climate conditions regulated the photosynthetic response of Amazon forests to the 2015/2016 El Nino-Southern Oscillation event
Background climate conditions regulated the photosynthetic response of Amazon forests to the 2015/2016 El Nino-Southern Oscillation event Open
Amazon forests have experienced multiple large-scale droughts in recent decades, which have increased tree mortality and reduced carbon sequestration. However, the extent to which drought sensitivity varies across Amazonian forests and its…
View article: Variation of non‐structural carbohydrates across the fast–slow continuum in Amazon Forest canopy trees
Variation of non‐structural carbohydrates across the fast–slow continuum in Amazon Forest canopy trees Open
Tropical tree species span a range of life‐history strategies within a fast–slow continuum. The position of a species within this continuum is thought to reflect a negative relationship between growth and storage, with fast‐growing species…
View article: Non-structural carbohydrates mediate seasonal water stress across Amazon forests
Non-structural carbohydrates mediate seasonal water stress across Amazon forests Open
View article: Leaf phenology as one important driver of seasonal changes in isoprene emissions in central Amazonia
Leaf phenology as one important driver of seasonal changes in isoprene emissions in central Amazonia Open
Isoprene fluxes vary seasonally with changes in environmental factors (e.g., solar radiation and temperature) and biological factors (e.g., leaf phenology). However, our understanding of the seasonal patterns of isoprene fluxes and the ass…
View article: Supplementary material to "Leaf phenology as one important driver of seasonal changes in isoprene emission in central Amazonia"
Supplementary material to "Leaf phenology as one important driver of seasonal changes in isoprene emission in central Amazonia" Open
Supplementary Information for: "Leaf phenology as one important driver of seasonal changes in isoprene emission in central Amazonia" 1. Isoprene flux -Relaxed Eddy Accumulation system 1.1 Source of errors According to Arnts et al. (2013), …
View article: Leaf phenology as one important driver of seasonal changes in isoprene emission in central Amazonia
Leaf phenology as one important driver of seasonal changes in isoprene emission in central Amazonia Open
Isoprene fluxes vary seasonally with changes in environmental factors (e.g., solar radiation and temperature) and biological factors (e.g., leaf phenology). However, our understanding of seasonal patterns of isoprene fluxes and associated …
View article: Data, Depth, and Design: Learning Reliable Models for Skin Lesion\n Analysis
Data, Depth, and Design: Learning Reliable Models for Skin Lesion\n Analysis Open
Deep learning fostered a leap ahead in automated skin lesion analysis in the\nlast two years. Those models are expensive to train and difficult to\nparameterize. Objective: We investigate methodological issues for designing and\nevaluating…
View article: Seasonality of isoprenoid emissions from a primary rainforest in central Amazonia
Seasonality of isoprenoid emissions from a primary rainforest in central Amazonia Open
Tropical rainforests are an important source of isoprenoid and other volatile organic compound (VOC) emissions to the atmosphere. The seasonal variation of these compounds is however still poorly understood. In this study, vertical profile…
View article: Leaf development and demography explain photosynthetic seasonality in Amazon evergreen forests
Leaf development and demography explain photosynthetic seasonality in Amazon evergreen forests Open
Leaf seasonality in Amazon forests Models assume that lower precipitation in tropical forests means less plant-available water and less photosynthesis. Direct measurements in the Amazon, however, show that production remains constant or in…
View article: Seasonality of isoprenoid emissions from a primary rainforest in central Amazonia
Seasonality of isoprenoid emissions from a primary rainforest in central Amazonia Open
Tropical rainforests are an important source of isoprenoid and other Volatile Organic Compound (VOC) emissions to the atmosphere. The seasonal variation of these compounds is however still poorly understood. In this study, profiles were co…
View article: Band combinations for detecting leaf amount and leaf age in QuickBird satellite and RGB camera images
Band combinations for detecting leaf amount and leaf age in QuickBird satellite and RGB camera images Open
Leaf amount and leaf age may drive seasonal variation in canopy-scale photosynthetic capacity and carbon balance in the Central Amazon. It is therefore important to measure these phenological attributes. We used linear discriminant analysi…