A5070832612- Aquatic Ecosystems and Phytoplankton Dynamics
- Marine and coastal ecosystems
- Fish biology, ecology, and behavior
- Marine Biology and Ecology Research
- Coastal wetland ecosystem dynamics
- Coastal and Marine Management
- Water Quality and Pollution Assessment
- Freshwater macroinvertebrate diversity and ecology
- Atmospheric and Environmental Gas Dynamics
- Microbial Community Ecology and Physiology
- Fern and Epiphyte Biology
- Methane Hydrates and Related Phenomena
- Fish Ecology and Management Studies
- Plant and animal studies
- Crustacean biology and ecology
- Marine and fisheries research
- Ecology and Vegetation Dynamics Studies
- Geography and Environmental Studies
- Isotope Analysis in Ecology
- Environmental Toxicology and Ecotoxicology
- Constructed Wetlands for Wastewater Treatment
- Coastal and Marine Dynamics
- Plant Diversity and Evolution
- Hydrocarbon exploration and reservoir analysis
- Soil and Water Nutrient Dynamics
Universidade Federal do Rio de Janeiro
2015-2024
Linköping University
2023
Universidade do Estado do Rio de Janeiro
2019
Narodowy Instytut Leków
2015
Rotary International
2008
Universidade Federal de São Carlos
1989
Abstract Methane (CH 4 ) emissions from lakes are the largest of freshwater ecosystems. We compile open water CH emission estimates individual all over world and consider three main pathways: diffusive; ebullitive; storage. The relationships between emissions, environmental variables, lake characteristics methodological approaches investigated for measurements 297 lakes. show that factors, such as temperature precipitation, act important driving factors with higher occurring where air...
The emission of methane (CH4) is an important factor in the Earth's climate and its excessive input into atmosphere contributes to global warming. Natural wetlands are one major sources CH4 atmosphere. This study was carried out evaluate seasonal variation fluxes from two tropical coastal lagoons difference efflux littoral (vegetated) limnetic (unvegetated) regions. conducted dry rainy seasons. We measured Potential Methane Fluxes (PMF), Diffusive (DMF), concentrations water column,...
Dissolved organic carbon (DOC) photochemical reactions establish important links between DOC and planktonic bacteria. We hypothesize that seasonal changes in quality, related to the flood pulse, drive effects of light–DOC interactions on uptake by bacteria clear-water Amazonian ecosystems. Water samples from two ecosystems (one lake one stream) were incubated sunlight during different hydrological periods then exposed bacterial degradation. Photochemical degradation driven inputs. Bacterial...
Abstract Objectives The objective of this study was to perform a multinational survey patients' colonization by metallo-β-lactamase (MBL)-producing Enterobacteriaceae, including their molecular characterization. Methods Patients in 18 hospital units across Europe and Israel (n = 17 945) were screened between mid-2008 mid-2011. MBL-producing isolates typed PFGE MLST. MBL genes amplified sequenced within integrons. Plasmids with analysed nuclease S1 plus hybridization profiling, mating...
The gut content of 495 specimens Farfantepenaeus brasiliensis, 131 F. paulensis (Penaeidae) and 102 Macrobrachium acanthurus (Palaemonidae) were analyzed to establish the composition their diets brasiliensis had as most important feeding items in its diet larvae Chironomidae, Polychaeta Heleobia australis (Mollusca). For paulensis, same for but order importance H. was inverted. M. detritus item, followed by Chironomidae larvae, Odonata nymphs, fragments macroalgae Chara. results showed that...
In this paper, we report the seasonal variation of photo-oxidation rates in a tropical humic lagoon and its relation to annual rainfall regime. Photo-oxidation ranged from 8.96 415.06 µmol C·L –1 ·day , being higher beginning middle rainy season declining throughout year. Although dissolved organic carbon (DOC) concentration, water color, sunlight incidence were generally season, not significantly related any these parameters. seems be influenced mainly by changes DOC photoreactivity, which...
In view of the intimate relationship humans with coastal lagoons (used for recreation, tourism, water supply, etc.), discharge domestic effluents may lead to establishment routes dissemination pathogenic microorganisms, including microorganisms carrying genes resistance antimicrobials, through surrounding human communities. The objective present investigation was relate presence antimicrobial-resistant bacteria environmental characteristics three lagoons, comparing results those from...
Abstract Changes in mineralization rates of stable or persistent organic matter induced by inputs labile can alter the carbon (C) balance along terrestrial‐aquatic ecosystem continuum. This phenomenon, also known as priming effect, is well‐established terrestrial ecosystems, but has only recently been explored domain aquatic ecology–with widely contrasting responses to effect reported across literature. Here, we compiled data from experimental studies on C systems that directly indirectly...
Salinity is a well-recognised factor that shapes population dynamics and community structure through direct indirect effects. The responses of Moina micrura (Cladocera) to slight salinity increases (up 6.0) were evaluated laboratory manipulative experiments field observations at Cabiúnas lagoon (Rio de Janeiro, Brazil). From the data, positive relationship between M. density was observed, whereas opposite found for other co-occurring microcrustaceans. Life-table from showed better...
Abstract The quillwort Isoëtes cangae is a critically endangered species occurring in single lake Serra dos Carajás, Eastern Amazon. Low genetic diversity and small effective population sizes ( N e ) are expected for narrow endemic (NES). Conservation biology studies centered show some limitations, but they still useful considering the limited time resources available protection of at risk extinction. Here, we evaluated diversity, structure, , minimum viable (MVP) I . to provide information...
The aim of this study was to evaluate methane concentration in water column and pore at limnetic littoral regions a coastal lagoon. At the region samples were taken from three monospecific macrophytes stands (Typha domingensis, Eleocharis interstincta Potamogeton stenostachys). higher than found each fraction sediment. superficial sediment (0-2 cm) shown P. stenostachys stand (3.7 mM). It only significantly different (p<0.05) region. increased with depth aquatic stands. did not vary among...
Summary 1. Prey usually benefit from the early recognition of potential predators by changing their behaviour, morphology and life history. Some cladocerans even shift production parthenogenetic to resting eggs when facing risk predation. This would be particularly beneficial if could detect predation hatch appropriately. 2. Here, we evaluated responses small‐bodied, tropical fish kairomones alarm signals. Life‐history changes (including eggs) in active females Moina hatching Diaphanosoma...
Aim: In this study we tested the effects of drying or refrigerating (4 °C) cladoceran resting eggs from a tropical aquatic system on hatching rates and time to hatching, in order determine what conditions should not be applied break dormancy cladocerans; Methods: Resting two species were isolated sediment coastal lagoon exposed low temperatures for four months before incubation under control conditions; Results: For Moina micrura, as well reduced proportion hatched, but refrigeration also...
Impacts of mining activity can be particularly difficult to remediate in wetland ecosystems subject inundation pulses due the reduced length plant growing season. We used a factorial experiment test whether litter and seed addition could increase efficiency ecological restoration on flood‐prone forest (known as igapó ) impacted by deposition bauxite tailings. Our results clearly showed that collected from pristine areas increased growth, seedling density, species richness. The individual...
In general, Passiflora species have been reported for their folk medicinal use as sedative and anti-inflammatory. However, P. caerulea has already to treat pulmonary diseases. Severe tuberculosis, generally caused by Mycobacterium tuberculosis strains resistant multiple drugs, can lead deleterious inflammation high mortality, encouraging new approaches in drug discovery. Thus, the aim of this work was evaluate mucronata Lam., Passifloraceae, potential treatment. Specifically, related...