Buscar
Mostrando ítems 1-10 de 144
Evidence for euphotic zone anoxia during the deposition of Aptian source rocks based on aryl isoprenoids in petroleum, Sergipe-Alagoas Basin, northeastern Brazil
(2013-10-01)
Four crude oil samples from the Sergipe-Alagoas Basin, northeastern Brazil, were analyzed using full scan gas chromatography-quadrupole mass spectrometry (GC-qMS) for biomarkers, in order to correlate them using aromatic ...
Evidence for euphotic zone anoxia during the deposition of Aptian source rocks based on aryl isoprenoids in petroleum, Sergipe-Alagoas Basin, northeastern Brazil
(2013-10-01)
Four crude oil samples from the Sergipe-Alagoas Basin, northeastern Brazil, were analyzed using full scan gas chromatography-quadrupole mass spectrometry (GC-qMS) for biomarkers, in order to correlate them using aromatic ...
Mesoscale primary production and bio-optical variability off Antofagasta (23-24° S) during the transition to El Niño 1997-1998
(2002)
The spatial variability of primary production (PP), chlorophyll-a (Chl-a) and the photosynthetic parameters were studied off Antofagasta, Chile (23-24° S, 70-72° W) during austral summer and winter. Between cruises (January ...
Temporal variability of the physical and chemical environment, chlorophyll and diatom biomass in the euphotic zone of the Beagle Channel (Argentina): Evidence of nutrient limitation
(Pergamon-Elsevier Science Ltd, 2021-07)
Coastal, semi-enclosed aquatic ecosystems of sub-polar regions surrounded by continental glaciers are among the most sensitive environments to climate change. The Beagle Channel (Argentina-Chile, ~55°S, 71°-66°W), which ...
Evidence for toxic cyanobacteria in sediments and the water-sediment interface of a tropical drinking water reservoir
(2021)
Cyanobacterial blooms in drinking water reservoirs constitute a health risk for humans and animals, especially in tropical zones where climate conditions may favour their prevalence throughout the year. The presence, ...
Phytoplankton primary productivity in an urban eutrophic reservoir (São Paulo, Brazil)
(2008-12-01)
The aim of this study was to analyze temporal ..d vertical variation of the biomass and of phytoplankton primary productivity in an urban eutrophic reservoir, in relation to the physical and chemical characteristics of the ...
Phytoplankton primary productivity in an urban eutrophic reservoir (São Paulo, Brazil)
(2008-12-01)
The aim of this study was to analyze temporal ..d vertical variation of the biomass and of phytoplankton primary productivity in an urban eutrophic reservoir, in relation to the physical and chemical characteristics of the ...
Satellite estimates of euphotic zone and Secchi disk depths in a colored dissolved organic matter-dominated inland water
(Elsevier B.V., 2020-03-01)
The water transparency is an important parameter to water quality monitoring. To quantify the water transparency the attenuation coefficient, k(d), of the photosynthetically active radiation - PAR, k(d)(PAR), the euphotic ...