The objective of this research was to carry out a survey of the diatomaceous fluorula (Bacillariophyta) in the Branco River basin and its sub-basins in the State of Roraima (Amazonia, Brazil). The taxa were identified and presented on plates with photomicroscopy. The collections...
This research makes a brief review of the limnology of lakes in wetlands in the Western Amazon, associating physical-chemical and morphological aspects to the biodiversity of black-waters lakes and whitewaters lakes. Lakes in these areas can show different patterns of vertical st...
Open access
Research Article10.9734/jalsi/2022/v25i530303
The State of Roraima (Amazon - Brazil) is considered well-preserved from an environmental point of view, sheltering a great variety of rivers and forest and “cerrado” streams, with white (muddy), black and clear waters. From the identification of the planktonic community of diato...
Open access
Research Article10.9734/ajfar/2023/v21i6558
The objectives of this research were to evaluate the quality and to determine the degree of vulnerability and accessibility of groundwater destined to the public supply of the municipality of Abaetetuba (State of Pará - Brazil), allowing to establish an environmental management p...
Open access
Research Article10.9734/JALSI/2018/41619
Aims and Place: The variable transparency, temperature, dissolved oxygen, conductivity, pH, total suspended solids (TSS), turbidity and ion balance (Na+, K+, Ca2+, Mg2+, Cl-, HCO3- + CO32- and SO42-) were measured in surface waters of the Amazon River and Mamiá Lake during the hy...
Open access
Research Article10.9734/BJECC/2017/27897
Aims and Place: The increase in greenhouse gas emissions in recent decades, especially CO2, is attributed to the increasing burning of fossil fuels and the expansion of agricultural activities. Therefore, more information should be garnered about the mechanisms that control car...
Open access
Research Article10.9734/BJECC/2015/18144
The objective of this study was to investigate the variation of levels of organic pollution and metal contamination (Al, Ca, Cd, Cu, Cr, Fe, K, Mg, Mn, Na, Pb and Zn) in the sediments of the drainage channels from Una basin in 2002 and 2015, after implementation of the Una Basin...
Open access
Research Article10.9734/JALSI/2018/43188