A5000273701- Marine and coastal ecosystems
- Microbial Community Ecology and Physiology
- Aquatic Ecosystems and Phytoplankton Dynamics
- Air Quality and Health Impacts
- Climate Change and Health Impacts
- Aquaculture Nutrition and Growth
- Marine Biology and Ecology Research
- COVID-19 impact on air quality
- Marine Biology and Environmental Chemistry
- Marine Bivalve and Aquaculture Studies
- Diatoms and Algae Research
- Aquatic life and conservation
- Environmental DNA in Biodiversity Studies
- Methane Hydrates and Related Phenomena
- Environmental Chemistry and Analysis
- Data Mining Algorithms and Applications
- Environmental Toxicology and Ecotoxicology
- Chromium effects and bioremediation
- Aquaculture disease management and microbiota
- Freshwater macroinvertebrate diversity and ecology
- Fish biology, ecology, and behavior
- Air Quality Monitoring and Forecasting
- Marine and coastal plant biology
- Water Treatment and Disinfection
- Water Quality and Pollution Assessment
Universidade Federal do Rio Grande do Sul
2010-2024
Universidade Federal do Rio Grande
2013-2024
Universidade Federal do Rio Grande do Norte
2014-2023
University of Rio Grande and Rio Grande Community College
2014
The canonical Redfield C:N:P ratio for algal biomass is often not achieved in inland waters due to higher C and N content more variability when compared the oceans. This has been attributed much lower residence times contributions of watershed total organic matter pool continental ecosystems. In this study we examined effect water low latitude lakes (in a gradient from humid semi-arid region) on seston elemental ratios different size fractions. We used lake specific conductivity as proxy...
Macrophytes are important sources of dissolved organic carbon (DOC) to littoral zones lakes, but this DOC is believed be mostly refractory bacteria, leading the hypothesis that bacterial metabolism different in and pelagic a large subtropical shallow lake. We tested by three approaches: (I) inorganic (DIC) accumulation water; (II) O(2) consumption estimate for cloud points (n = 47) covering entire lake; (III) measurement CO(2) dark bottles, pCO(2) water, lake-atmosphere fluxes (fCO(2)) set...
The diatom Asterionellopsis glacialis sensu lato forms high-density patches in the surf zone of some sandy beaches worldwide and was until recently considered a cosmopolitan species. With recent description four cryptic species, identity specimens found these accumulations remains uncertain. In this study, were sampled from two Brazilian coast: one tropical (Futuro Beach, 3° S; 38° W) subtropical (Cassino 32° 52° W). Fine structure frustules sequencing three phylogenetic markers revealed...
Abstract Aim We aimed at investigating changes in major groups of plankton (bacterioplankton, phytoplankton and zooplankton) bacterioplankton metabolism along a transect covering littoral, macrophyte dominated zone to pelagic, the large subtropical shallow lake Mangueira, Rio Grande do Sul State, Brazil. Methods The 3.2 km littoral-pelagic (7 points) was sampled October 2007 southern section lake. Major taxonomic zooplankton were counted identified by optic microscopy. FISH (Fluorescent situ...
The aim of this study was to test the effect different ionic adjustments in low salinity water on composition and temporal variation plankton from intensive shrimp nurseries with a synbiotic system. For this, Penaeus vannamei nursery (35 days) carried out three treatments: T1 – diluted seawater (control; ∼2.5 g L−1), T2 L−1 K+ adjustment approximate equivalent concentration, T3 Ca:Mg:K ratio adjusted 1:3:1. Rice bran processed by probiotic microorganisms used as an organic carbon source....
Ecologically safe antifouling solutions have received growing attention since the acknowledgment of environmental risks traditional biocides used currently. Given that bacteria constitute initial stage biofouling process, this work aims to evaluate potential aquatic macrophyte extracts in inhibiting biofilm-forming and their ecotoxicological effects on target nontarget organisms (Thalassiosira pseudonana Nitokra sp.). For this, ability 25 inhibit eradicate single multispecies estuarine...
In this study we measured the relative contribution of two components β-diversity, turnover and nestedness, bacterioplankton among 25 shallow lakes in southern Brazil tested their relationship with local (environment, chlorophyll-a biomass phytoplanktonic classes) landscape variables, as well geographical distance. We predicted that would be largest share total β-diversity due to variation characteristics lakes. Further, expected nestedness increase at expense increasing distance dispersal...
High stocking density aquaculture can result in major environmental impacts such as waste disposal with high organic matter. In order to overcome this issue, biofloc technology (BFT) has arisen an alternative lower effluent nutrient loading by promoting dense microbial communities that control water quality through the assimilation of inorganic nutrients. Given central role microorganisms nutrients storage, aim study was evaluate elemental composition bioflocs and free-living determine which...
Studies of fungal communities through amplicon metagenomics in aquatic environments, particularly freshwater ecosystems, are still relatively recent. Unfortunately, many these water bodies facing growing threats from human expansion, such as effluent discharge various activities. As a result, effluents have the potential to significantly alter characteristics and, subsequently, impact diversity their resident microorganisms. In this context, our objective was investigate whether community...
Macrophytes have been associated with low bacterial metabolism in the littoral zones of lake Mangueira, but an explanation for this pattern is largely unknown. In study, macrophyte-derived DOM was incubated situ measurement effect grazers, bacteria, and light on its degradation three experiments. The water separated bulk, bacterial, control (+ HgCl 2 ) fractions exposed to or hidden from sunlight 120 h. Unchange variables bulk fraction suggested a combined radiation grazing bacteria. Light...
Salinization is a serious environmental issue that poses risks to continental waters and associated freshwater biota. Non-halophyte macrophytes are particularly susceptible, since their growth other basic physiological functions, such as osmoregulation nutrient uptake, can be severely affected by salinization. Ecological repercussions follow may include the promotion of harmful algal/cyanobacterial blooms due competition alleviation nutrients release from plant decay. To reproduce effects...