Biochemical Composition and Foraminiferal Content of Sediments for Determining Bottom Sector Environments in Guanabara Bay (Rio de Janeiro, Brazil)

Clemente, Iara; Silva, Frederico Sobrinho da; Laut, Lázaro; Frontalini, Fabrizio; Costa, Vitor Lima da; Rodrigues, Maria Antonieta da Conceição; Pereira, Egberto; Bergamaschi, Sérgio; Filho, João Graciano Mendonça; Martins, Maria Virgínia Alves

doi:10.2112/jcoastres-d-14-00104.1

Cited by 30 publications

(29 citation statements)

References 74 publications

(77 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Siqueira et al (2006) observed the TS mean value of 6.03% in Santos estuary (São Paulo State, Brazil). Using the same TS methodology of the present study, Clemente et al (2015) recorded the mean value of 1.4% in Guanabara Bay; recorded values varying from 0.03% (IT02) to 1.73% (IT10) in Itaipu Lagoon (both in Rio de Janeiro State); and Martins et al (2016) found values of 0.04% in Bizerte Lagoon (Tunisia).…”

Section: Organic Enrichment In Surface Sediments Of Slssupporting

confidence: 59%

See 1 more Smart Citation

Assessment of the Trophic State of Saquarema Lagoonal System, Rio De Janeiro (Brazil)

et al. 2017

Self Cite

View full text Add to dashboard Cite

Section: Organic Enrichment In Surface Sediments Of Slssupporting

confidence: 59%

“…They allowed to identify the most impacted regions, as well as to understand the effects of the organic matter accumulation on the microbiota of coastal environments (Baptista Neto et al, 2005;Silva et al, 2008Silva et al, , 2010Silva et al, , 2011aClemente et al, 2015;Laut et al, 2016 a, b, c).…”

Section: Introductionmentioning

confidence: 99%

Assessment of the Trophic State of Saquarema Lagoonal System, Rio De Janeiro (Brazil)

et al. 2017

Self Cite

View full text Add to dashboard Cite

“…Several works have been performed to study benthic foraminiferal distribution and ecology in the Guanabara Bay (Vilela et al, 2001(Vilela et al, a, b, 2003(Vilela et al, , 2004(Vilela et al, , 2011Fontana et al, 2006;Kfouri-Cardoso et al, 2006;Pereira et al, 2006;Figueira et al, 2007;Donnici et al, 2012;Eichler et al, 2013;Clemente et al, 2015) as well as in the sedimentary record to reconstruct paleoenvironmental evolution (e.g., Vilela et al, 2007;Baptista Neto et al, 2016). However, all the previous works in the Guanabara Bay have been based on total (living plus dead) benthic foraminiferal assemblages.…”

Section: The Main Goals Of This Studymentioning

confidence: 99%

“…Kfouri-Cardoso et al, 2006;Laut et al, 2012;Pereira et al, 2006;Figueira et al, 2007;Vilela et al, 2001Vilela et al, a, b, 2003Vilela et al, , 2004Vilela et al, , 2007Vilela et al, , 2011Donnici et al, 2012;Eichler et al, 2013;Clemente et al, 2015;Baptista Neto et al, 2016) as well as in other Brazilian (e.g., Brönnimann et al, 1981;Bonetti and Eichler, 1997;Raposo et al, 2016), and worldwide (Murray, 1991(Murray, , 2006Laut et al, 2014Laut et al, , 2016Martins et al, 2015Martins et al, a, b, 2016 transitional coastal environments. Laut et al (2012b) based on published works gave an overview of the main species that occur in the Guanabara Bay.…”

Section: The Benthic Foraminiferal Response To Toc Enrichment and Gasmentioning

confidence: 99%

High-Resolution Acoustic Mapping of Gas Charged Sediments and Living Benthic Foraminifera Assemblages From the Ne Region of the Guanabara Bay (Rj, Brazil)

et al. 2016

Self Cite

View full text Add to dashboard Cite

. High-resolution acoustic mapping of gas charged sediments and living benthic foraminifera assemblages from the NE region of the Guanabara Bay (RJ, Brazil). Journal of Sedimentary Environments, 1 (3): 360-384. AbstractThis work was performed in the NE region of the Guanabara Bay, a highly impacted Brazilian coastal system, located in Rio de Janeiro State. It aimed to: i) identify and map the areas with occurrence of gas in the sediment, as well as its acoustic signature; ii) characterize the physical properties of the sediments and; iii) document the response of microbenthic organisms (living benthic foraminifera) to changes in quantity and quality of organic matter. Seismic surveys at the frequency of 12 kHz identified a large area with about 50% gas charged sediments in the study area.The main acoustic signatures of the shallow gas were black shadow and gas blanket. In addition, features related to gas seepages to the water column (acoustic plumes and pockmarks) and gas percolation within the sediments (intrasedimentary plumes, turbidity pinnacles) were also identified. The gas has a biogenic origin and results from the high acumulation rate between 0.03 to 0.9 cm.year -1 and from the decomposition of large amount of organic matter (10-20%). Vertical distribution of gas ranges from few centimeters to 9 m below the water-sediments interface. These occurrences are related to both gas migration from lower sedimentary layers to Holocene muds above, and to recent generation in near-surface sediments as the area display favorable conditions for gas production. Cores ranging from 150-240 cm in length have predominantly muddy sediments and variations in the P-wave velocity followed the changes in sediment density, controlled mainly by the presence of gas in sediments, bioclasts accumulation, textural variation and percentage of organic matter. Journal of Sedimentary Environments

show abstract

“…According to Murray (1991;2006), B. elegantissima is a species that presents opportunistic behavior when the supply of organic matter increases and the oxygen concentrations drop, as observed by Vilela et al (2014), Clemente et al (2015) and Baptista-Neto et al (2017) in Guanabara Bay (Brazil).…”

Section: Composition Of Benthic Foraminifera Assemblagesmentioning

confidence: 99%

Holocene Closure of a Barrier Beach in Sepetiba Bay and Its Environmental Impact (Rio De Janeiro, Brazil)

et al. 2017

Self Cite

View full text Add to dashboard Cite

. Late Holocene closure of a barrier beach in Sepetiba Bay and its environmental impact (Rio de Janeiro, Brazil). Journal of Sedimentary Environments, 2 (1): 65-80. AbstractCore T4 (with 286 cm long) collected in the inner part of Sepetiba Bay is a record of late Holocene evolution of Sepetiba Bay. This core was described and sampled every 2 cm. Textural, geochemical and foraminifera data were analyzed, and two radiocarbon dates were obtained. Estimated ages indicate that core T4 represents the last ≈4,000 years calibrated before present (yrs cal BP). Results of this core suggest that coarse sediments, recorded in the period between ≈4,000-3,400 yrs cal BP, were probably associated with high hydrodynamic conditions in the study area. These sediments should be deposited at an incipient phase of the Marambaia Beach Barrier evolution. The development of this sand barrier resulted in the confinement of the inner region of Sepetiba Bay, leading to the deposition of muddy sediments rich in organic matter. Organic matter enrichment increased especially in the last ≈500 yrs cal BP. Foraminifera assemblages and carbonates content indicate that the studied region should have been affected in the last ≈3,400 yrs cal BP by changes in the water depth column. An increase of the water column depth was recorded for example between ≈850-350 yrs BP. The results obtained in the core T4 show that the confinement and eutrophication process of the internal zone of Sepetiba Bay has been occurring since ≈3,400 yrs cal BP and is being caused by other factors such as geomorphological and climatic changes and human activities.

show abstract

Biochemical Composition and Foraminiferal Content of Sediments for Determining Bottom Sector Environments in Guanabara Bay (Rio de Janeiro, Brazil)

Abstract: Clemente, I.M.M.M.; da Silva, F.S.; Laut, L.L.M.; Frontalini, F.; da Costa, V.L.; da Conceiçã o Rodrigues, M.A.; Pereira, E.; Bergamaschi, S.; Filho, J.G.M., and Martins, M.

Cited by 30 publications

References 74 publications

Assessment of the Trophic State of Saquarema Lagoonal System, Rio De Janeiro (Brazil)

Assessment of the Trophic State of Saquarema Lagoonal System, Rio De Janeiro (Brazil)

High-Resolution Acoustic Mapping of Gas Charged Sediments and Living Benthic Foraminifera Assemblages From the Ne Region of the Guanabara Bay (Rj, Brazil)

Holocene Closure of a Barrier Beach in Sepetiba Bay and Its Environmental Impact (Rio De Janeiro, Brazil)

Contact Info

Product

Resources

About