Publications by authors named "Caio A Magalhaes"
Article Synopsis
- Researchers studied the brown alga Sargassum furcatum and three families of amphipods in the São Sebastião Channel, Brazil, to see if they could indicate petroleum hydrocarbon pollution.
- They found that while the natural substances of the algae and amphipods made up most of the n-alkanes present, some signs of petroleum were evident, including uncharacteristic n-alkane patterns.
- Total polycyclic aromatic hydrocarbons (PAHs) in samples ranged from 33.4 to 2010 ng/g, with low molecular weight PAHs like naphthalene predominating, suggesting the algae and amphipods are effective indicators of petroleum input, even at low concentrations.
Article Synopsis
- The main focus of the study is the environmental effects of produced water (PW) discharge from oil and gas platforms, which can also serve as artificial reefs.
- Two fish species, Caranx crysos and Tylosurus acus, were captured near discharging platforms P19 and P40, as well as a nondischarging platform P25 for comparison.
- The study found that Caranx crysos had the highest concentrations of polycyclic aromatic hydrocarbons (PAH) in muscle tissue at P40, indicating that PW discharge could be linked to higher contamination levels, while trace elements remained stable across all platforms.
Distribution and evolution of sterols and aliphatic hydrocarbons in dated marine sediment cores from the Cabo Frio upwelling region, SW Atlantic, Brazil.
Environ Sci Pollut Res Int
August 2017
We report the distribution of selected lipid biomarkers specifically sterols and aliphatic hydrocarbons in sediment cores from Cabo Frio, SW Atlantic continental shelf, Brazil, corresponding approximately to the last 700 years. In the Cabo Frio region, a costal upwelling occurs as a quasi-seasonal phenomenon characterized by nutrient-rich bottom waters that intrude on the continental shelf and promote relatively high biological productivity compared to other Brazilian continental shelf areas. The results for sterols indicate the predominance of organic matter (OM) inputs related to marine organisms, mainly plankton, in all of the cores along the time scale studied.
View Article and Find Full Text PDFHigh spatial variability in polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs), organochlorine pesticides, such as DDTs, and polybrominated diphenylethers was observed in plastic pellets collected randomly from 41 beaches (15 cities) in 2010 from the coast of state of São Paulo, southeastern Brazil. The highest concentrations ranged, in ng g(-1), from 192 to 13,708, 3.41 to 7554 and <0.
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