A5077535791- Aquatic Ecosystems and Phytoplankton Dynamics
- Marine and coastal ecosystems
- Fish biology, ecology, and behavior
- Fish Ecology and Management Studies
- Microbial Community Ecology and Physiology
- Heavy metals in environment
- Pesticide and Herbicide Environmental Studies
- Environmental Toxicology and Ecotoxicology
- Marine Ecology and Invasive Species
- Pharmaceutical and Antibiotic Environmental Impacts
- Hydrocarbon exploration and reservoir analysis
- Coastal wetland ecosystem dynamics
- Water Quality and Pollution Assessment
- Marine Biology and Ecology Research
- Aquatic Invertebrate Ecology and Behavior
- Freshwater macroinvertebrate diversity and ecology
- Marine Toxins and Detection Methods
- Protist diversity and phylogeny
- Aquatic Ecosystems and Biodiversity
- Methane Hydrates and Related Phenomena
- Weed Control and Herbicide Applications
- Coral and Marine Ecosystems Studies
- Tailings Management and Properties
- Mollusks and Parasites Studies
- Parasites and Host Interactions
Universidade Federal de Juiz de Fora
2015-2024
Instituto Biológico
2020
Universidade Federal do Rio de Janeiro
2013
On November 2015, one of Brazil's most important watersheds was impacted by the mine waste from Fundão dam collapse in Mariana. The traveled over 600 km along Doce River before reaching sea, causing severe devastation its way. Here we assessed trace element concentrations and cytogenotoxic effects released waste. Water samples were collected ten days after disaster two sites non-impacted site. Sampling points located hundreds kilometers downstream collapsed dam. used for quantification to...
Freshwater sediments are important sites of organic carbon (OC) burial and mineralization. Previous studies indicate that warming can increase rates OC mineralization, implying more CO 2 release from and, consequently, less burial, but temperatures typical tropical ecosystems poorly represented in the models temperature We measured mineralization 61 Brazilian systems, including rivers, streams, lakes, coastal lagoons, reservoirs different regions (Pantanal, Amazonia, Atlantic Forest, areas)....
Substantial amounts of organic matter (OM) from terrestrial ecosystems are buried as sediments in inland waters. It is still unclear to what extent this OM constitutes a sink carbon, and how much it returned the atmosphere upon mineralization carbon dioxide (CO2). The construction reservoirs affects cycle by increasing sedimentation at regional scale. In study we determine sediment three zones (river, transition, dam) tropical hydroelectric reservoir Brazil well identify composition pool...
Abstract. Hydroelectric reservoirs bury significant amounts of organic carbon (OC) in their sediments. Many are characterized by high sedimentation rates, low oxygen concentrations bottom water and a share terrestrially derived OC, all these factors have been linked to efficiency OC burial. However, investigations burial (OCBE, i.e., the ratio between buried deposited OC) limited few studies, none which include spatially resolved analyses. In this study we determined spatial variation OCBE...
Abstract Aim Anthropogenic modifications in the landscape are accelerating biogeochemical cycles and causing unbalances terrestrial aquatic ecosystems with still unknow impacts on biotic abiotic processes. Therefore, there has been increasing scientific interest links between human activities functions. Methods Here we review role of sediments carbon pollutant cycle. Results We briefly explore historical context, origin, composition sediments, as well factors that influence processes...
Increased periods of prolonged droughts followed by severe precipitation events are expected throughout South America due to climate change. Freshwater sediments especially sensitive these changing conditions. The increased oscillation water levels in aquatic ecosystems causes enhanced cycles sediment drying and rewetting. Here we experimentally evaluate the effects induced drought a rewetting event on release carbon dioxide (CO2), methane (CH4), nutrients (nitrogen phosphorus), trace...
Inorganic turbidity can limit light penetration in water and reduce phytoplankton photosynthesis. Anthropogenic activities such as mining produce or augment the amount of suspended inorganic particles water. Recent disasters Brazil have released tons mine tailings into aquatic ecosystems, with known unknown negative consequences for life, biodiversity, ecosystem services beyond human material losses. Here, we investigated effects on chlorophyll content composition caused by sediments from...
Mining is an important economic activity that can have severe impacts on aquatic ecosystems. Plankton communities are commonly used as bioindicators of human‐related threats to freshwater environments due their rapid response environmental conditions changes. Here, we zooplankton functional diversity understand the recovery patterns Amazonian lake impacted by mining (input bauxite tailings) after 30 years natural attenuation and active restoration processes. Zooplankton species richness...
In response to the massive volume of water along Amazon River, tributaries have their backed up by 100s kilometers upstream mouth. This backwater effect is part complex hydrodynamics Amazonian surface waters, which in turn drives variation concentrations organic matter and nutrients, also regulates planktonic communities such as viruses bacteria. Viruses bacteria are commonly tightly coupled each other, ecological role aquatic food webs has been increasingly recognized. Here, we surveyed...