A5061134258- Plant Water Relations and Carbon Dynamics
- Climate variability and models
- Plant responses to elevated CO2
- Remote Sensing in Agriculture
- African Botany and Ecology Studies
- Geology and Paleoclimatology Research
- Plant Stress Responses and Tolerance
- Environmental and biological studies
- Ionosphere and magnetosphere dynamics
- Geophysics and Gravity Measurements
- Coastal wetland ecosystem dynamics
- GNSS positioning and interference
- Peatlands and Wetlands Ecology
- Simulation Techniques and Applications
- Geography and Environmental Studies
- Aerospace Engineering and Energy Systems
- Plant Diversity and Evolution
- Plant Taxonomy and Phylogenetics
- Phytochemistry Medicinal Plant Applications
- Atmospheric Ozone and Climate
- Antioxidant Activity and Oxidative Stress
- Solar Radiation and Photovoltaics
- biodegradable polymer synthesis and properties
- Growth and nutrition in plants
- Soil and Unsaturated Flow
Universidade do Estado do Amazonas
2011-2024
National Institute of Amazonian Research
2009-2022
Escola Superior de Ciências da Saúde
2019
Pennsylvania State University
2016
Indiana University Bloomington
2016
Universidade Federal de Santa Maria
2016
Walker (United States)
2016
Universidade de Brasília
2004
We investigated the seasonal patterns of water vapor and sensible heat flux along a tropical biome gradient from forest to savanna. analyzed data network towers in Brazil that were operated within Large‐Scale Biosphere‐Atmosphere Experiment Amazonia (LBA). These tower sites included humid semideciduous forest, transitional floodplain (with physiognomies cerrado), cerrado sensu stricto. The mean annual at all ranged 20 38 Wm −2 , was generally reduced wet season increased late dry season,...
Abstract We describe the salient features of a field study whose goals are to quantify vertical distribution plant-emitted hydrocarbons and their contribution aerosol cloud condensation nuclei production above central Amazonian rain forest. Using observing systems deployed on 50-m meteorological tower, complemented with tethered balloon deployments, aerosols was determined under different boundary layer thermodynamic states. The forest emits sufficient reactive hydrocarbons, such as isoprene...
Abstract A dense Global Navigation Satellite System (GNSS) meteorological network (∼20 stations) in the central Amazon Basin Brazil is being developed for long‐term studies of deep convection/water vapor interactions and feedback. In this article, described preliminary results are presented: GNSS‐derived precipitable water useful tracking advection identifying convective events convergence timescales. Upon completion (early 2011), 3D field analyses participation intensive campaign GPM‐CHUVA...
Abstract To investigate the consequences of land use on carbon and energy exchanges between ecosystem atmosphere, we measured CO 2 water vapour fluxes over an introduced Brachiara brizantha pasture located in Cerrado region Central Brazil. Measurements using eddy covariance technique were carried out field campaigns during wet dry seasons. Midday net exchange rates season −40 μmol m −2 s −1 , which is more than twice rate found (−15 ). This was observed despite similar magnitudes irradiance,...
Abstract Understanding the complex interactions between water vapor fields and deep convection on mesoscale requires observational networks with high spatial (kilometers) temporal (minutes) resolution. In equatorial tropics, where dominates vertical distribution of most important greenhouse substance—water—these are nonexistent. Global Navigational Satellite System (GNSS) meteorological offer temporal/spatial resolution precipitable vapor, but infrastructure exigencies great. The authors...
ABSTRACT To investigate how and to what extent there are differences in the photosynthetic plasticity of trees response different light environments, six species from three successional groups (late successional, mid‐successional, pioneers) were exposed environments [deep shade – DS (5% full sunlight FS), moderate MS (35% FS) FS]. Maximum net photosynthesis ( A max ), leaf N partitioning, stomatal, mesophile, biochemical limitations (SL, ML, BL, respectively), carboxylation velocity V cmax...
The balance between efficiency of absorption and use light energy is fundamental for plant metabolism to avoid photoinhibition. Here, we investigated the effects environments on photosynthetic apparatus tropical tree species three successional groups (pioneer, mid-, late successional) subjected different conditions: full sunlight (FS), moderate shade (MS), deep (DS). Twenty-nine ecophysiological parameters were correlated with each other. pioneer exhibited better photochemical performance a...
N-fixing leguminous species can reach atmospheric dinitrogen gas (N 2 ), having an advantage under N-limited degraded environments. These N-fixers are constantly used as facilitative species. Chlorophyll a fluorescence (ChF) acknowledges how different take up and use light energy during photosynthesis. techniques assess stress performance responses to photosynthesis for the selection of with potential reforestation. Six Fabaceae were selected this study: three nonfixing ( Cenostigma...
ABSTRACT We evaluated the local population dynamic of two epiphytic species, Syrrhopodon helicophyllus and Thysananthus amazonicus, over six years from 2014-2020, both before after fire event which occurred in white-sand forest (Campinarana) located Central Amazon. did not observed an overall differences on colony abundance host tree time 2019. However, abundances shifts along vertical gradient towards mesic microenvironment allow to persist during El Niño 2015-2016, recovered following...
The seasonal changes in the energy balance after substitution of a herbaceous savanna by Brachiaria field located Orinoco lowlands were assessed over an entire year using eddy covariance technique. Simultaneously, was monitored as control. This work provides evidence that vegetation replacement lead to different patterns and water balance. trends latent heat flux (λE) available (Ra) ratio tended decrease senescence increased due influence air humidity mole fraction deficit soil content on...
Abstract Atmospheric nitrous oxide (N 2 O) is a potent greenhouse gas thought to be mainly derived from microbial metabolism as part of the denitrification pathway. Here, we report that in unexplored peat soils Central and South America, N O production can driven by abiotic reactions (≤ 98 %) highly competitive their enzymatic counterparts. Extracted soil iron positively correlated with in-situ determined isotopic tracers. Moreover, found reduction accompanied production, essentially closing...
Polyethylene and polypropylene, known as conventional plastic, from non-renewable sources, like oil, are successfully replacing by glasses papers in packaging industry due to their low cost, variety durability [1]. However, these plastics for being slow degradability hinder the exchange of gas decomposition other compounds cause health problems when they not disposed properly [2]. Nowadays, there another renewable plastic polyhydroxyalkanoates (PHA), manufactured plants, fungi and/or...
The surface energy balance is rarely closed using the common half-hourly averaging period for turbulent fluxes as eddies of greater characteristic time scales often provide a non-trivial contribution to exchange. Here, we briefly discuss previous efforts improve surfasse closure tropical rainforest ecosystem – K34 site - and describe how measurements from GoAmazon campaign can be used our understanding flux storage in canopies.
Simulation emerges as a valid alternative to studies and analysis of clinical practices in detriment traditional public health solutions, including for actions combat the new coronavirus. In this paper, authors address programs used modeling simulating behavior Sars-Cov. The purpose approach is verify simulation programs, both theoretical practical studies, that were current pandemic against virus through bibliographic study. For bibliographical reference, articles based on research about...
The aim of this study was to describe the main characteristics agroforestry homesteads communities Bela Vista, Maracarana, São Benedito and Manain located in Uatumã Sustainable Development Reserve, state Amazonas, Brazil. A total 55 were randomly selected characterized four where semi-structured interviews guided tours conducted with residents collect socioeconomic information regarding contribution these agroecosystems community. management is simple low cost, since it involves traditional...