Adriana O. Medeiros
A5077431784- Freshwater macroinvertebrate diversity and ecology
- Fish biology, ecology, and behavior
- Yeasts and Rust Fungi Studies
- Fish Ecology and Management Studies
- Plant Pathogens and Fungal Diseases
- Environmental and biological studies
- Soil and Water Nutrient Dynamics
- Mycorrhizal Fungi and Plant Interactions
- Aquatic Ecosystems and Phytoplankton Dynamics
- Hydrology and Sediment Transport Processes
- Fermentation and Sensory Analysis
- Forest Ecology and Biodiversity Studies
- Water Quality and Pollution Assessment
- Microbial Community Ecology and Physiology
- Land Use and Ecosystem Services
- Geography and Environmental Studies
- Environmental DNA in Biodiversity Studies
- Polar Research and Ecology
- Aquatic Invertebrate Ecology and Behavior
- Hydrology and Watershed Management Studies
- Ecology and Vegetation Dynamics Studies
- Soil erosion and sediment transport
- Enterobacteriaceae and Cronobacter Research
- Plant and animal studies
- Plant Disease Resistance and Genetics
Universidade Federal da Bahia
2014-2025
Instituto Biológico
2024
Hospital Ana Nery
2009-2014
University of Coimbra
2008-2010
Universidade Federal de Minas Gerais
2004-2008
Centro de Excelência em Bioinformática
2006
An experiment in >1000 river and riparian sites found spatial patterns controls of carbon processing at the global scale.
Summary 1. The objective was to test whether a decrease in oxygen concentration streams affects the diversity and activity of aquatic hyphomycetes consequently leaf litter decomposition. 2. Senescent leaves Alnus glutinosa were immersed for 7 days reference stream, fungal colonization, then incubated 18 microcosms at five concentrations (4%, 26%, 54%, 76% 94% saturation). Leaf decomposition (as loss toughness), diversity, reproduction spore production) biomass (ergosterol content)...
Riparian plant litter is a major energy source for forested streams across the world and its decomposition has repercussions on nutrient cycling, food webs ecosystem functioning. However, we know little about dynamics in tropical streams, even though tropics occupy 40% of Earth's land surface. Here investigated spatial temporal (along year cycle) patterns inputs storage multiple three biomes Brazil (Atlantic forest, Amazon forest Cerrado savanna), predicting differences among relation to...
Abstract The relationship between detritivore diversity and decomposition can provide information on how biogeochemical cycles are affected by ongoing rates of extinction, but such evidence has come mostly from local studies microcosm experiments. We conducted a globally distributed experiment (38 streams across 23 countries in 6 continents) using standardised methods to test the hypothesis that enhances litter streams, establish role other characteristics assemblages (abundance, biomass...
Running waters contribute substantially to global carbon fluxes through decomposition of terrestrial plant litter by aquatic microorganisms and detritivores. Diversity this may influence instream globally in ways that are not yet understood. We investigated latitudinal differences mixtures low high functional diversity 40 streams on 6 continents spanning 113° latitude. Despite important variability our dataset, we found the effect decomposition, which explained as evolutionary adaptations...
Rivers and streams contribute to global carbon cycling by decomposing immense quantities of terrestrial plant matter. However, decomposition rates are highly variable large-scale patterns drivers this process remain poorly understood. Using a cellulose-based assay reflect the primary constituent detritus, we generated predictive model (81% variance explained) for cellulose across 514 globally distributed streams. A large number variables were important predicting decomposition, highlighting...
The objectives of this study were to investigate leaf breakdown in two reaches different magnitudes, one a 3rd (closed riparian vegetation) order and the other 4th (open order, tropical stream assess colonization invertebrates microorganisms during processing detritus. We observed that detritus reach decomposed 2.4 times faster than which, we nitrate concentration water velocity greater. This showed chemical composition does not appear be important evaluating breakdown. However, it was shown...
Abstract The high biodiversity of tropical forest streams depends on the strong input organic matter, yet leaf litter decomposition dynamics in these are not well understood. We assessed how seasonal litterfall affects breakdown, density and biomass aquatic invertebrates, microbial sporulation hyphomycetes a South American grassland ‘vereda’ landscape. Although production riparian area was low, breakdown compared with other systems, maximum values coinciding rainy season. Fungal decomposing...
Yeast communities were assessed in 14 rivers and four lakes from the Doce River basin Brazil, during rainy dry seasons of years 2000 2001. Water samples collected at subsurface all sites. The following physical chemical parameters measured: temperature, dissolved oxygen, pH, electrical conductivity, total phosphorus, ortho-phosphate, ammonium, nitrate, nitrite nitrogen counts faecal coliforms heterotrophic bacteria carried out to characterize aquatic environmental sampled. yeast higher...
ABSTRACT Decomposition of plant litter is a key ecological process in streams, whose contribution to the global carbon cycle large relative their extent on Earth. We examined mechanisms underlying temperature sensitivity (TS) instream decomposition and forecast effects climate warming this process. Comparing data from 41 globally distributed sites, we assessed TS microbial total using nine species combined six mixtures. Microbial conformed metabolic theory ecology its was consistently higher...
The main goals of this study were: 1) to evaluate the structure, diversity, and functional trophic group composition benthic macroinvertebrate communities; 2) characterize water quality in headwaters Doce river watershed, based on physical, chemical, biological parameters (benthic macroinvertebrates, fecal coliforms, heterotrophic bacteria, yeasts); 3) contribute knowledge structure function longitudinal gradients lotic ecosystems Brazil. A total 60 taxa were identified, dominant being...
Since the beginning of COVID-19 pandemic, publications have highlighted disproportionate impact pandemic on academic mothers, mostly focusing social distancing and quarantine. A few months later, despite lack effective vaccines or therapeutics in sight, many economic activities are being resumed. Nurseries schools expected to be among latest reopen, which will amplify impacts mothers. In this letter, we unwrap mothers describe a set specific short-, medium- long-term policies that, if...
Abstract Microbes play a critical role in plant litter decomposition and influence the fate of carbon rivers riparian zones. When decomposing low‐nutrient litter, microbes acquire nitrogen (N) phosphorus (P) from environment (i.e., nutrient immobilization), this process is potentially sensitive to loading changing climate. Nonetheless, environmental controls on immobilization are poorly understood because rates also influenced by chemistry, which coupled same factors. Here we used...
Leaf breakdown is a primary process of nutrient cycling and energy flow, contributing to the functioning aquatic ecosystems. In present study, leaves Baccharis platypoda Coccoloba cereifera were incubated in high-altitude stream rupestrian field. Two hypotheses tested: i) intrinsic factors (quality detritus) are more important than extrinsic (decomposer communities) decomposition; ii) low detritus quality hinders microbial colonization, thereby altering composition structure associated...