Results 21 to 30 of about 519 (177)

Acute and chronic toxicity of sediment samples from Guanabara Bay (RJ) during the rainy period

Brazilian Journal of Oceanography, 2010
Guanabara Bay is a marine-estuarine environment of high ecological and socio-economic importance, subject to a variety of environmental impacts. Sediment is the eventual repository for most substances introduced into water bodies and may, therefore ...
Luciane Alves Maranho, Ilene Matanó Abreu, Ricardo Erthal Santelli, Renato Campelo Cordeiro, Abílio Soares-Gomes, Lucas Buruaem Moreira, Rodofley Davino Morais, Denis Moledo de Sousa Abessa   +7 more
doaj   +1 more source

Modern Diatom Distributions in Guanabara Bay Sediment and Oceanic Areas, Rio de Janeiro (Brazil) [PDF]

Anuário do Instituto de Geociências, 2011
One hundred and fifty three superficial sediments were collected in Guanabara Bay to physical-chemistry and diatom analyses in the ambit to Monitoring Project (CENPES/PETROBRAS). A total of 146 taxa of diatoms were identified where the most frequent taxa
Frederico S. Silva, Vanessa M. Laut, Lazaro L.M. Laut, Alberto G. de Figueiredo Jr.   +3 more
doaj  

Impact of the Icaraí Sewage Outfall in Guanabara Bay, Brazil [PDF]

Brazilian Archives of Biology and Technology, 2006
The present study aimed to evaluate the water quality of the Icaraí Sewage Outfall (ISEO) area. Sampling was conducted during winter and summer, and water samples were analyzed for dissolved oxygen, pH, temperature, salinity, dissolved inorganic nutrients (DIN), seston, particulate organic matter (POM), and pigments.
Marques Júnior, Aguinaldo Nepomuceno, Crapez, Mirian Araujo Carlos, Barboza, Conceição Denise Nunes   +2 more
openaire   +4 more sources

Geochronology and heavy metal flux to Guanabara bay, Rio de Janeiro state: a preliminary study

Anais da Academia Brasileira de Ciências, 2013
Guanabara Bay, located in Rio de Janeiro state. It is surrounded by the second most important metropolitan area of the country. Over recent decades, land disturbance and urbanization in the surrounding area has significantly increased sediment input to ...
Jose A. Baptista Neto, Tomas C.S. Peixoto, Bernard J. Smith, John J. Mcalister, Soraya M. Patchineelam, Sambasiva R. Patchineelam, Estefan M. Fonseca   +6 more
doaj   +1 more source

HIDROCARBONETOS NO MATERIAL PARTICULADO EM SUSPENSÃO DA BAÍA DE GUANABARA: AVALIAÇÃO DO ESTADO DE CONTAMINAÇÃO

Geochimica Brasiliensis, 2018
Located in the center of the metropolitan region of Rio de Janeiro, and surrounded by one of the most developed regions of Brazil, Guanabara bay is one of the most degraded estuarine environments in the country, with a chronic contamination state by ...
Iná Barros, Cássia Farias, Cláudia Hamacher, Michelle Araújo, Bruna Paixão, Lays Souza   +5 more
doaj   +1 more source

Geochemistry and mineralogy of recent sediments of Guanabara Bay (NE sector) and its major rivers - Rio de Janeiro State - Brazil

Anais da Academia Brasileira de Ciências, 2001
Geochemical and clay mineralogical studies of bottom sediments collected along the Macacu and Caceribu rivers and Guanabara Bay were carried out in order to investigate the relationship between major source areas and recent sediments of the bay.
MARCIA DE MELO FARIA, BRAZ A. SANCHEZ
doaj   +1 more source

GUANABARA BAY: ENVIRONMENTAL EDUCATION THROUGH AN INTERDISCIPLINARY THEMATIC [PDF]

Periódico Tchê Química, 2010
This paper shows an interdisciplinary project that involved two scholar subjects: Chemistry and Regional Studies (subject of business administration course of Fundação Osório). The Guanabara Bay was the scene for observations and discussions about the origins, causes and possible solutions in terms of time scale for the environmental question.
De Souza, Paulo Sérgio Alves, Rua, Emílio Reguera   +1 more
openaire   +1 more source

Multibiomarker Approach in Fish to Assess a Heavily Polluted Brazilian Estuary, Guanabara Bay

Environmental Monitoring and Assessment, 2022
Abstract Brazil’s Guanabara Bay (GB), located in Rio De Janeiro, is a deeply contaminated, eutrophic waterbody that has a reduced environment that challenges the understanding of the effects of pollutants on the biota. This paper presents an integrated strategy to evaluate the impact of contamination, utilizing a multibiomarker approach in the ...
Marina Moreira, Freire, Cristina, Gomez, Josino Costa, Moreira, Ana Rosa, Linde Arias   +3 more
openaire   +2 more sources

Do Boat Traffic and Habitat Features Shape Habitat Use by Guiana Dolphins (Sotalia guianensis) in a Brazilian Estuary?

Ecology and Evolution, Volume 16, Issue 7, July 2026.
This study investigates how boat traffic and environmental factors shape the spatial distribution and habitat selection of Guiana dolphins in a northeastern Brazilian estuary. Although dolphins and boats overlapped broadly—particularly in deeper waters—dolphins showed a preference for areas with lower boat traffic, greater depths, and proximity to ...
Alice Lima, Gastón Andrés Fernandez Giné, Khamila Tondinelli Souza Cruz, Niel Nascimento Teixeira, Gil Marcelo Reuss Strenzel, Yvonnick Le Pendu   +5 more
wiley   +1 more source

Virioplankton dynamics are related to eutrophication levels in a tropical urbanized bay. [PDF]

PLoS ONE, 2017
Virioplankton are an important and abundant biological component of marine and freshwater ecosystems. Often overlooked, aquatic viruses play an important role in biogeochemical cycles on a global scale, infecting both autotrophic and heterotrophic ...
Anderson S Cabral, Mariana M Lessa, Pedro C Junger, Fabiano L Thompson, Rodolfo Paranhos   +4 more
doaj   +1 more source