A5027373797- Geology and Paleoclimatology Research
- Fish biology, ecology, and behavior
- Amazonian Archaeology and Ethnohistory
- Isotope Analysis in Ecology
- Geological formations and processes
- Aquatic Ecosystems and Phytoplankton Dynamics
- Marine and coastal ecosystems
- Geochemistry and Geologic Mapping
- Groundwater and Isotope Geochemistry
- Coastal wetland ecosystem dynamics
- Geography and Environmental Studies
- Geochemistry and Elemental Analysis
- Heavy metals in environment
- Particle Detector Development and Performance
- Coastal and Marine Dynamics
- Paleontology and Stratigraphy of Fossils
- Evolution and Paleontology Studies
- Genomics and Phylogenetic Studies
- Radiation Detection and Scintillator Technologies
- Microbial Community Ecology and Physiology
- Water Quality and Pollution Assessment
- Environmental and Cultural Studies in Latin America and Beyond
- Aeolian processes and effects
- Mine drainage and remediation techniques
- Reproductive Health and Technologies
Universidade Federal Fluminense
2014-2024
Universidade Positivo
2017-2022
Hospital Universitário Evangélico de Curitiba
2022
Universidade Federal de São Paulo
2022
University of South Dakota
2018
Centro Brasileiro de Pesquisas Físicas
2002
Abstract Satellite images can now be used to assess river sediment discharge, and systematic studies over rivers lakes are required support such applications document the variability of inland water optical properties at watershed scale. The Amazon Basin waters were analyzed from in situ measurements remote sensing reflectance ( R rs ) 279 stations downwelling diffuse attenuation coefficients K d 133 stations. Measurements apparent properties, suspended particulate matter (SPM) contents,...
Abstract A significant proportion of carbon (C) captured by terrestrial primary production is buried in lacustrine ecosystems, which have been substantially affected anthropogenic activities globally. However, there a scarcity sedimentary organic (OC) accumulation information for lakes surrounded highly productive rainforests at warm tropical latitudes, or response to land cover and climate change. Here, we combine new data from intensive campaigns spanning 13 across remote Amazonian regions...
Abstract A large amount of dust from the Sahara reaches Amazon Basin, as observed with satellite imagery. This is thought to carry micronutrients that could help fertilize rainforest. However, considering different atmospheric transport conditions, aridity levels in South America and Africa active volcanism, it not clear if same pathways for have occurred throughout Holocene. Here we present analyses Sr-Nd isotopic ratios a lacustrine sediment core remote Lake Pata region encompasses past...
Abstract Aim Ongoing and future anthropogenic climate change poses one of the greatest threats to biodiversity, affecting species distributions ecological interactions. In Amazon, climatic changes are expected induce warming, disrupt precipitation patterns particular concern, increase intensity frequency droughts. Yet response ecosystems intense warm, dry events is not well understood. Andes mid‐Holocene event (MHDE), c. 9,000 4,000 years ago, was warmest driest period last 100,000 which...
Abstract Coastal wetlands are highly sensitive to changes occurring at the coastline. It is critically important determine region‐specific projections for these areas due their specificities and vulnerabilities climate change. This work aimed value impacts of recent West Africa Sahara coastland, southern Morocco, Khnifiss Lagoon. We have applied a combined approach using remote sensing techniques environmental reconstructions based on high‐resolution analysis sediment cores, covering current...
In order to understand the impact of hydrological changes Amazon River on sedimentary organic matter (OM) composition in Amazonian floodplain lakes, three sediment cores were collected from Lake Maracá (eastern Amazonia) along a transect main channel inland. The dated with 14 C accelerator mass spectrometry (AMS) and studied by x-ray, mineralogical composition, total carbon (TOC) nitrogen (TN) contents, stable isotopic TOC TN (δ 13 OC δ 15 N) glycerol dialkyl tetraether (GDGT) distributions....
By monitoring the chlorophyll a concentration (chla), it is possible to keep track of eutrophication status lake and describe temporal dynamics phytoplankton biomass. Such must be both extensive intensive account for short- long-term biomass variations. This may achieved by remote estimation chla through an orbital sensor with high resolution. In this study, we used MODIS imagery produce 21-year time series three strategic lakes Brazilian semi-arid region: Eng. Armando Ribeiro Gonçalves,...
Coastal ecosystems are important destinations for natural and anthropogenic inputs, areas experiencing eutrophication from untreated sewage globally. However, the mechanistic link of how coastal waters sediments can jointly respond to nutrient enrichment, especially nitrogen (N) phosphorus (P), remains relatively unknown. Here, we assessed interdecadal variability in N P contents, comparing four surface water sampling sites (∼40-year monthly concentrations) three 210Pb dated sediment cores...
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Abstract Located at the northwestern part of Amazon basin, Rio Negro is largest black-water river in world and one poorest studied regions lowlands. In middle-upper were retrieved sediment cores form Lake Acarabixi, which analyzed using pollen, spores, charcoal, geochemistry. The aim this study was to detect influences from humans dynamics on vegetation history region. Two main periods detected. From 10,840 8240 cal yr BP, had a direct influence into lake. lake regional input charcoal...
As an ecotone, the region between Amazon Rainforest and Tropical Savanna (Cerrado) biomes is, by definition, more susceptible to climate change. Therefore, understanding palaeoenvironmental dynamics is essential address future responses of such transition areas climatic fluctuations. In this context, we present a new sediment record for Late-Holocene retrieved from Barro-Preto, currently oxbow lake located in ecotone at southern Brazilian border. Our multi-proxy data include carbon nitrogen...