A5058859499- Marine and coastal ecosystems
- Aquatic Ecosystems and Phytoplankton Dynamics
- Fish Ecology and Management Studies
- Water Quality and Pollution Assessment
- Fish biology, ecology, and behavior
- Hydrological Forecasting Using AI
- Fish Biology and Ecology Studies
- Water Quality Monitoring Technologies
- Environmental Toxicology and Ecotoxicology
- Physiological and biochemical adaptations
- Atmospheric and Environmental Gas Dynamics
- Tailings Management and Properties
- Statistical and Computational Modeling
- Isotope Analysis in Ecology
- Aquaculture Nutrition and Growth
- Water Quality Monitoring and Analysis
- Neural Networks and Applications
- Geochemistry and Geologic Mapping
- Microbial Community Ecology and Physiology
- Fire effects on ecosystems
- Animal testing and alternatives
- Mine drainage and remediation techniques
- Heavy Metal Exposure and Toxicity
- Geography and Environmental Studies
- Information Science and Libraries
Universidade do Estado de Minas Gerais
2016-2025
Universidade Federal de Minas Gerais
2012-2021
Universidade Federal de Santa Catarina
2018
Aarhus University
2018
The effect of light availability on lake gross primary production (GPP) depends the physical setting and meteorological chemical conditions characterizing lake. Although it has long been recognized that complex interactions between external in-lake affect whole-lake GPP, few studies have evaluated importance different drivers daily seasonal variability in GPP for a diverse set types. In this study, we used unique dataset covering wide spectrum lakes terms size, nutrient loading,...
In this study, we examined the relationships between water quality, land use, and optical properties of dissolved organic matter (DOM) in Doce River Basin Southeast Brazil. By highlighting profound impacts human activities, such as agriculture, mining, urbanization, aim to provide a comprehensive assessment quality. We utilized DOM recognize inadequacy traditional indicators chlorophyll-a, especially turbid waters. collected samples from 27 sites along its tributary, Santo Antônio River,...
The structure and density of plankton communities greatly influence carbon nutrient cycling as well the environmental status lake ecosystems. This community can respond to a range drivers, including those influenced by human perturbations on local regional scales, causing abrupt changes imbalances. While implications climate land-use are evident for tropical conditions, their impacts planktonic population dynamics less understood. In this study, we aimed investigate how distinctive levels...
Abstract Wildfire activity is increasing globally. The resulting smoke plumes can travel hundreds to thousands of kilometers, reflecting or scattering sunlight and depositing particles within ecosystems. Several key physical, chemical, biological processes in lakes are controlled by factors affected smoke. spatial temporal scales lake exposure extensive under‐recognized. We introduce the concept smoke‐day, number days any given exposed fire season, quantify total smoke‐day North America from...
De Mello NAST, Brighenti LS, Barbosa FAR, Staehr PA, Bezarra Neto JF. 2017. Spatial variability of methane (CH4) ebullition in a tropical hypereutrophic reservoir: silted areas as bubble hot spot. Lake Reserv Manage. 35:105—114.The concentration has doubled the atmosphere over last 200 yr, raising need to understand emissions this potent greenhouse gas from inland waters. CH4 is dominant pathway shallow aquatic environments and difficult quantify due its episodic nature heterogeneous spatial...
Abstract. Despite the increasing understanding about differences in carbon cycling between temperate and tropical freshwater systems, our knowledge on importance of organic matter (OM) pools light absorption properties lakes is very scarce. We performed a factorial mesocosm experiment lake (Minas Gerais, Brazil) to evaluate effects increased concentrations allochthonous autochthonous OM, availability characteristics chromophoric dissolved (CDOM). Autochthonous OM deriving from phytoplankton...
Near-term ecological forecasts provide resource managers advance notice of changes in ecosystem services, such as fisheries stocks, timber yields, or water quality. Importantly, can identify where there is uncertainty the forecasting system, which necessary to improve forecast skill and guide interpretation results. Uncertainty partitioning identifies relative contributions total variance introduced by different sources, including specification model structure, errors driver data, estimation...
Abstract Global changes, such as climate and land use alterations, are expected to affect freshwater ecosystems, modifying environmental conditions with ultimate effects on carbon nutrient cycling. While of these changes have been the focus several studies in temperate lakes, remarkably little effort has dedicated understanding behaviour responses tropical lakes despite their importance environments. In a factorial mesocosm study conducted lake, we investigated how conditions, additions...
AIM: This study aims to demonstrate the potential of hydroacoustics in behavior invertebrate Chaoborus and fish neotropical water environments; METHODS: Synoptic campaigns were conducted May June-2008 Dom Helvécio Carioca lakes, at Parque Estadual do Rio Doce (MG), Nado reservoir, Belo Horizonte (MG). The acoustic scattering targets was studied using a downward-oriented split-beam 200 kHz echosounder; RESULTS: We detected clear echo signals from larvae, which can be viewed high density all...
Herein we determine for the first time reproduction parameters and population structure of Hypostomus francisci in Itapecerica River, São Francisco Basin. A total 250 specimens was captured quarterly between March 2010 February 2012. Body weight, length weight gonads were obtained laboratory. Gonad samples submitted to histological histochemical techniques. Females with spawning capable ovaries used fecundity relative fecundity. Sex ratio 1:1.01 (female:male) observed. Males more numerous...
Gross primary production (GPP) and community respiration (R) are increasingly calculated from high-frequency measurements of dissolved oxygen (DO) by fitting dynamic metabolic models to the observed DO time series. Because different combinations components result in nearly same series, theoretical problems burden this inverse modeling approach. Bayesian parameter inference could improve identification processes including independent knowledge estimation procedure. This method, however,...
Wildfire activity is increasing globally. The resulting smoke plumes can travel hundreds to thousands of kilometers, reflecting or scattering sunlight and depositing ash within ecosystems. Several key physical, chemical, biological processes in lakes are controlled by factors affected smoke. spatial temporal scales lake exposure extensive underrecognized. We introduce the concept lake-smoke day, number days any given exposed fire season, quantify total day North America from 2019 - 2021....
AIM: To study the distribution, structure, size and density of fish in karst lake: Lagoa Central (Lagoa Santa, MG - surface area: 1.7 km²; mean depth: 4.0 m; maximum 7.3 m). METHODS: The hydroacoustic method with vertical beaming was applied, using echosounder Biosonics DT-X a split-beam transducer 200 kHz. analysis acoustic data performed software Visual Analyzer (Biosonics Inc.). Thematic maps echoes associated fish, estimated by technique echo-integration, were made kriging interpolation....
The goal of this study was to verify the utility and accuracy two tools obtain a bathymetric chart for Lagoa Central (Lagoa Santa, State Minas Gerais, Brazil) also assess morphometric parameters lake their implications in ecology system. tested were Biosonics DT-X (Biosonics Inc.) echosounder SonarLite (Ohmnex Ltda) bathymeter, both coupled Differential Global Positioning System (DGPS) geographic coordinates associated with depth each point. is small, shallow (Zmax < 7.5 m), low relative...
We studied the effects of particulate and dissolved optically active components on attenuation photosynthetic radiation (PAR) in a tropical lake. The temporal spatial distribution tripton, Chl-a aCDOM(440) their relative contribution to diffuse PAR coefficient (Kd) was investigated at 21 sites (dry wet seasons two intermediate periods) monthly interval 1 pelagic site. Higher values Kd were observed during mixing period, characterized by higher concentration tripton compared stratified...
Top predator fish, such as peacock bass (Cichla kelberi) and red-bellied piranha (Pygocentrus nattereri), were introduced in the lacustrine system of Rio Doce basin these introductions are associated with loss aquatic biodiversity. The present work aims to investigate life-history traits a native species, thraira (Hoplias malabaricus), context pressures caused by introduction top fishes. Two lakes selected conservation unit River State Park (PERD), namely, Lake Carioca, where P. nattereri C....
Os compostos nitrogenados (nitrito, nitrato e amônia) são considerados tóxicos para os peixes, pois capazes de promover alterações histológicas bioquímicas, diminuir a capacidade trasnporte oxigênio no sangue afetar o fitness (i.e. aptidão do organismo em termos crescimento natação). Esses acumulam ambiente aquático através da excreção organismos aquáticos, decomposição matéria orgânica tanto origem aquática quanto sistema terrestre adjacente, entrada direta pelo terrestre, afluentes águas...