Foraminíferos bentônicos no talude continental, platô de são paulo e cânions da bacia de campos

Sousa, Silvia Helena de Mello e; Yamashita, Cintia; Nagai, Renata Hanae; Martins, Maria Virgínia Alves; Ito, Carla; Vicente, Thaisa Marques; Taniguchi, Nancy Kazumi; Burone, Letícia; Fukumoto, Marina Midori; Aluizio, Rodrigo; Koutsoukos, Eduardo A. M.

doi:10.1016/b978-85-352-7263-5.50005-9

Cited by 6 publications

(6 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The comparison of density and species composition data in the austral winter of 2008 and austral summer of 2009 periods allows us to infer that during the winter, the food input was higher. The values of density and biomass of living benthic foraminifera allow us to suggest that the Almirante Câmara canyon is a greater entrapment site of organic matter between 400 and 1000 m isobaths in comparison to the open areas at the same isobaths [76].…”

Section: Results Obtained In Continental Slope Of the Campos Basin Anmentioning

confidence: 89%

“…According to Sousa et al [76], the availability and quality of the food, the energy state (stability) at the benthic/pelagic boundary, and the grain size of the substrate seem to be the most important environmental factors determining the distribution pattern of the benthic foraminiferal assemblages in the Campos Basin slope. The highest values of density, diversity, and richness, as well as the predominance of hyaline calcareous foraminifera and infaunal species, reflect a higher contribution of food received continuously in the shallower stations (400 m depth).…”

Section: Results Obtained In Continental Slope Of the Campos Basin Anmentioning

confidence: 99%

“…Even though the stations analyzed were the same or spatially very close to each other, the response of benthic foraminifera of the Campos Basin seems to be slightly different due to the seasonality. Because of these dissimilar times, the local hydrodynamics can change and, consequently, variations can occur in the particulate organic matter flux, and quantity and quality of the organic matter on the sea floor [73,75,76]. The benthic foraminifera and the geochemical results of these projects showed that, despite the intense oil exploration and production activities in the Campos Basin by PETROBRAS, these specific study areas (Figure 5) did not suffer anthropic impact in terms of pollutants [77].…”

Section: Results Obtained In Continental Slope Of the Campos Basin Anmentioning

confidence: 99%

“…In the Grussaí and Almirante Câmara canyons, the stations were located in four isobaths (400, 700, 1000, and 1300 m deep) and the obtained data were compared with adjacent transects on the open slope ( Figure 5). Changes in the density, diversity, and composition of benthic foraminifera were analyzed in response to environmental factors (i.e., sand and mud contents, calcium carbonate, total organic carbon and chlorophyll-a concentrations, and phytopigment concentrations in the sediment) (see details in [76]).…”

Section: Methods Applied In Continental Slope Of the Campos Basin (Sementioning

confidence: 99%

See 3 more Smart Citations

Response of Benthic Foraminifera to Environmental Variability: Importance of Benthic Foraminifera in Monitoring Studies

Martins¹,

Yamashita²,

Sousa³

et al. 2019

Monitoring of Marine Pollution

Self Cite

View full text Add to dashboard Cite

Foraminifera are eukaryotic unicellular microorganisms inhabiting all marine environments. The study of these protists has huge potential implications and benefits. They are good indicators of global change and are also promising indicators of the environmental health of marine ecosystems. Nevertheless, much remains to be learned about foraminiferal ecology. The goals of this chapter are (1) to provide a few examples from foraminifera studies, presenting possible use of foraminifera as bioindicators for the monitoring of transitional and marine ecosystems and (2) to highlight the importance of applying these organisms in environmental monitoring studies. A semienclosed coastal lagoon (Aveiro Lagoon; Portugal), an estuarine system (São Sebastião Channel; SE Brazil), a continental shelf sector (Campos Basin; SE Brazil), and a segment of continental slope (Campos Basin; SE Brazil) are used as examples.

show abstract

Section: Results Obtained In Continental Slope Of the Campos Basin Anmentioning

confidence: 89%

Section: Results Obtained In Continental Slope Of the Campos Basin Anmentioning

confidence: 99%

Section: Results Obtained In Continental Slope Of the Campos Basin Anmentioning

confidence: 99%

Section: Methods Applied In Continental Slope Of the Campos Basin (Sementioning

confidence: 99%

See 2 more Smart Citations

Response of Benthic Foraminifera to Environmental Variability: Importance of Benthic Foraminifera in Monitoring Studies

Martins¹,

Yamashita²,

Sousa³

et al. 2019

Monitoring of Marine Pollution

Self Cite

View full text Add to dashboard Cite

show abstract

“…As amostras provenientes dos períodos interglaciais (EIM 5 e 1) caracterizaram-se, em termos gerais, pelo maior percentual de sedimentos finos de origem terrígena e maiores valores de carbonato. A relação entre temperatura e teores de carbonato total é explicada por Suguio (2010) e foi discutida para estes testemunhos previamente por Petró (2018 Burone et al 2011;Mello e Sousa et al, 2017). Os altos valores de abundância de gêneros infaunais como Bulimina e Bolivina indicam predomínio de altas concentrações de nutrientes e baixos valores de oxigênio, sugerindo ambiente deposicional com características meso-eutróficas (Martins et al, 2006;Eichler et al, 2008;Nagai et al, 2009 Rodrigues et al (2018).…”

Section: Discussionunclassified

Succession of Benthic Foraminiferal Assemblages as Indicators of Paleoceanographic Variations in the Terrace of Torres (RS - Brazil) During the Late Quaternary

Schmitt¹,

Rodrigues

Bonetti³

2019

Anuário IGEO UFRJ

View full text Add to dashboard Cite

ResumoForaminíferos são protistas sensíveis a mudanças ambientais e atuam como paleoindicadores de características oceanográficas como temperatura, salinidade, fluxo de oxigênio, disponibilidade de nutrientes e gradiente de energia do meio. A identificação da sucessão de biofácies de foraminíferos bentônicos constitui assim uma metodologia útil na interpretação de processos paleoceanográficos. Amostras provenientes de dois testemunhos coletados no talude da porção norte da Bacia de Pelotas, posicionados em 1514 m e 2091 m de profundidade e com idades entre 112 e 7 ka foram analisadas quanto à densidade de testas, riqueza e abundância relativa das espécies. O objetivo da pesquisa foi avaliar como estes descritores responderam às grandes mudanças climáticas ocorridas ao longo dos cinco últimos estágios isotópicos marinhos. Foram identificados um total de 55 taxa ao longo destes testemunhos, com dominância de gêneros com hábito infaunal, tais como Globocassidulina, Bulimina, Bolivina e Uvigerina e a espécie Trifarina angulosa, sugerindo o predomínio de condições meso-eutróficas nesta área durante o período estudado. A análise de similaridade na abundância das espécies entre as amostras, segundo índice de Bray Curtis, levou ao reconhecimento de três associações ecológicas (compostas por um total de 14 famílias). Estas permitiram individualizar quatro zonas ecológicas distintas ao longo dos dois testemunhos, cuja sucessão temporal está sendo interpretada como resposta à influência de diferentes massas d´água e a variações no aporte de carbono para o compartimento bentônico entre períodos mais quentes e mais frios. AbstractForaminifers are protists sensitive to environmental changes and used as paleoindicators of oceanographic characteristics such as temperature, salinity, dissolved oxygen content, organic matter availability and hydrodynamic conditions. The identification of the succession of benthic foraminifera biofacies is thus a useful methodology for the interpretation of paleoceanographic processes. Samples from two sediment cores from the slope of the northern portion of the Pelotas Basin, located at 1514 m and 2091 m water depth and with ages between 112 and 7 ka were analyzed for the density of tests, richness and relative abundance of species. The objective was to evaluate the response of these descriptors to the major climatic changes occurred in the last five marine isotopic stages. A total of 55 taxa were identified throughout the cores, with dominance of infaunal genera, such as Globocassidulina, Bulimina, Bolivina and Uvigerina, and the species Trifarina angulosa, suggesting the predominance of meso-eutrophic conditions in this area during the studied period. The analysis of similarity in species abundance among the samples, according to Bray Curtis index, led to the recognition of three ecological associations (composed of a total of 14 families). These allowed to individualize four distinct ecological zones along the two sediment cores, whose temporal succession is being interpreted as a response to t...

show abstract

Evolution of the Paraíba do Sul Deltaic Complex (SE Brazil) based on benthic foraminiferal biofacies succession

Gasparini

Silveira

Vilela

2020

J. Sediment. Environ.

View full text Add to dashboard Cite

Foraminíferos bentônicos no talude continental, platô de são paulo e cânions da bacia de campos

Cited by 6 publications

References 46 publications

Response of Benthic Foraminifera to Environmental Variability: Importance of Benthic Foraminifera in Monitoring Studies

Response of Benthic Foraminifera to Environmental Variability: Importance of Benthic Foraminifera in Monitoring Studies

Succession of Benthic Foraminiferal Assemblages as Indicators of Paleoceanographic Variations in the Terrace of Torres (RS - Brazil) During the Late Quaternary

Evolution of the Paraíba do Sul Deltaic Complex (SE Brazil) based on benthic foraminiferal biofacies succession

Contact Info

Product

Resources

About