Tuberculosis (TB) treatment is highly effective, but response to therapy varies by geography and population subgroups. We assessed differences in TB treatment response in a representative and heterogeneous Brazilian population. We estimated genetic ancestry according to major genetic ancestry groups (African, European, and Amerindian) in the Regional Prospective Observational Research in Tuberculosis (RePORT)-Brazil cohort usi...

Urban freshwater ecosystems are increasingly exposed to mixtures of pollutants, including per- and polyfluoroalkyl substances (PFAS). However, their ecological effects remain poorly understood, especially in tropical regions with limited sanitation infrastructure. This study investigated PFAS contamination, water quality, and microbial community structure in Pampulha Lake, a tropical urban reservoir in southeastern Brazil. Spa...

Bees play an important role as pollinators, and evidence of global bee population declines has become increasingly common. While most studies of plant-pollinator networks focus on contemporary ecosystems, historical interaction datasets remain rare, particularly in tropical regions. Here, we revisited a historical dataset of plant-bee interactions collected between 1971 and 1975 in a cerrado area from southeastern Brazil that...

This study reports the first record of the endemic Lutz's stingray, Hypanus berthalutzae , from Brazil, at the upwelling ecosystem of Cabo Frio, southeastern Brazil. A mature female (2.44 m of total length) was incidentally captured by artisanal fisheries at 7 m depth in January 2025. Molecular identification ( COI , Cytb ), based on DNA barcoding and maximum likelihood phylogenetic analyses, confirmed similarity with H. berth...

Freshwater species are facing massive declines, often driven by eutrophication. Identifying which facets of biodiversity are sensitive is crucial, as species loss does not always translate to reduced ecosystem functioning and functional diversity. We examined how assembly rules shape zooplankton functional diversity in hypereutrophic fishponds. Higher eutrophication was hypothesised to cause functional homogenization through r...

The structure of epiphytic cyanobacteria and patterns of β- and functional diversity are crucial for understanding how aquatic environments respond to disturbances. This study evaluated how epiphytic cyanobacteria’s biomass, adaptive strategy groups, and β- and functional diversity components respond to increasing eutrophication and environmental homogenization in three tropical reservoirs. Hypereutrophic conditions supported...