Acute Toxicity Bioassay with the Amphipod, Grandidierella bonnieroides S. After Exposure to Sediments from an Urban Estuary (Macaé River Estuary, RJ, Brazil)

Abstract

Acute toxicity to Grandidierella bonnieroides and physicochemical analysis were used for quality assessment of the sediment of the Macaé River urban estuary, located in the Brazilian coast where rapid socioeconomic growth has been induced by offshore oil and gas exploration at the Campos Basin. Sediment samples were collected during four events in four sampling sites of the estuary and also in a control site. Organism mortality after exposure to the estuarine sediments was, on average, 30 % a value higher than in the control site where it was 10 %. This result together with the physicochemical analysis suggests an initial toxicity condition of the sediments from this aquatic coastal environment.

Social and Environmental Vulnerability in Environmental Education Practiced Within the Federal Licensing in Macaé (Rio De Janeiro, Brazil)

“…With regard to infrastructure, the city faces problems such as lack of water, lack of sewage treatment and degradation of ecosystems (MOLISANI et al, 2013), lack of hospitals and schools. The result of historically inefficient governments, the problems faced in the city go beyond those generated by the oil economy.…”

“…The figures point to a degree of complexity in the definition of groups in vulnerable situations in Macaé, because the risks are diverse and ever inherent in the daily life of many families. Among the neighborhoods in the city of Macaé three situations are emblematic: 1) Lagomar, to be located in the buffer zone of the Restinga de Jurubatiba National Park, with households a few meters of the pipeline that takes gas from the Campos Basin to the Cabiúnas Terminal (Tecab); 2) Águas Maravilhosas to be located on the former dumpsite of the city with high environmental risks and 3) Malvinas and Nova Holanda, with great concentration of residences in precarious situations near the estuary of Macaé river, highly degraded environment (MOLISANI et al, 2013) and with high levels of poverty and violence (WAISELFISZ, 2013).…”

First Evaluation of Genotoxicity of Macaé (Rj) Estuarine Waters

“…Other pollution activities such as the urban runoff, solid waste disposal, agriculture and animal husbandry were potential sources of contaminants to the estuary. Molisani et al, (2013a) estimated that anthropogenic sources were responsible for 62% of the total emission of Zn (29 t/year), 73% of Cu (7.0 t/year), 53% of Pb (7.9 t/year) and 57% of Cd (3.7 t/year) to the Macaé River basin and estuary; and thus, exceeding the loads from natural sources such as soil runoff and atmospheric deposition. In addition, other activities such as navigation and urbanization have increased the presence of oil derivatives and compounds such as polycyclic aromatic hydrocarbons (PAHs) in the estuary.…”

“…As a consequence, high PAH levels on mussel from the estuary were found, ranging from 2,876-6,101 µg/kg, which were typical of polluted areas (Santiago et al, 2016). Furthermore, many other biological effects have been found in the estuary, such as the catfish protective enzymatic responses to PAHs from the estuarine waters and sediments (Berenger, 2013); high concentrations of Cr in mussels (Santiago et al, 2016); fish abnormalities during embryonic development and juvenile growth (Nascimento, 2015); and mortality of amphipods exposed to estuarine sediments (Molisani et al, 2013a). Some metals and PAHs may be genotoxic at certain levels (Jha, 2004), therefore, our aim was to evaluate the levels of genotoxicity that these waters may cause in the known animal model.…”

Produção audiovisual no contexto da educação ambiental exigida no licenciamento de petróleo e gás no Estado do Rio de Janeiro

“…No estuário do rio Macaé, encontram-se elevados níveis de metais pesados e hidrocarbonetos (Molisani et al, 2013a;2013b), sofrendo forte pressão por atividades urbanas (Soffiati, 2015). Na Lagoa de Araruama, observa-se a presença de cianobactérias (Silva et al, 2011).…”