Controlling Factors on the Abundance, Diversity and Size of Living Benthic Foraminifera in the Ne Sector of Guanabara Bay (Brazil)

Martins, Maria Virgínia Alves; Laut, Lázaro; Frontalini, Fabrizio; Sequeira, Cristina; Rodrigues, R. F.; Fonseca, Maria Clara Machado da; Bergamashi, Sérgio; Pereira, Egberto; Delavy, Francielli Paula; Figueiredo, Alberto G.; Miranda, Paulo; Terroso, Denise; Pena, Assane Luis; Laut, Vanessa Mattos; Figueira, Rubens César Lopes; Rocha, Fernando

doi:10.12957/jse.2016.26872

Cited by 12 publications

(18 citation statements)

References 28 publications

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“…In this station, the sediments have relatively low concentrations of metals but display high organic matter content as marked by the high TOC content and LOI values (Appendix 1). As observed by Martins et al (2016c), in this area the organic matter is in oxic state and might be marine in origin. The living assemblages of this area are largely dominated by A. tepida with small percentages of bolivinids and buliminids such as B.…”

Section: Characteristics Of the Living And Dead Total Foraminiferal Asupporting

confidence: 56%

“…1; Appendix 1). These samples are the same analyzed by Delavy et al (2016) and Martins et al (2016c). The analyzed samples correspond to the first centimeter of the sediment obtained in at least three independent deployments of a box-corer in each studied station (Schönfeld et al, 2012).…”

Section: Methodsmentioning

confidence: 99%

“…The dead foraminiferal assemblages are compared in this work with selected results previously acquired and analyzed by Delavy et al (2016) and Martins et al (2016c), namely water physicochemical parameters, textural and geochemical results and living benthic (Rose Bengal stained) foraminifera. The methodology of analyses of these data is also described by these authors.…”

Section: Methodsmentioning

confidence: 99%

“…Following the methodology established by Martins et al (2016c), we define the dead foraminiferal assemblage (DFA) or living foraminiferal assemblage (LFA) as the dead and living specimens occurring in the sediment fraction 63-500 μm, respectively. The dead and living specimens in the 63-150 μm sedimentary fraction as foraminifera of the fine fraction (FFF) are defined as DFFF and LFFF, respectively; in the 150-250 μm sediment fraction as foraminifera of the medium fraction (FMF), dead (DFMF) and living (LFMF), respectively and; in the 250-500 μm sedimentary fraction as foraminifera of coarse faction (FCF), dead (DFCF) and living (LFCF), respectively.…”

Section: Foraminiferal Analysismentioning

confidence: 99%

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Similarity Between the Dead and Living Foraminiferal Assemblages in the Ne Sector of Guanabara Bay (Brazil)

et al. 2016

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Guanabara Bay (GB), located at the coast of Rio de Janeiro State (Brazil), is an ecosystem rich in biodiversity both in terms of mega, macro and microfauna. However, the factors that control their distribution are still poorly understood. This work intends to identify the possible factors affecting the distribution of benthic foraminifera in the bay by comparing living and dead assemblages in selected sediment fractions. Substantial differences in terms of density, diversity and equitability of the species in the living and dead assemblages and in different sediment fractions (63-150 μm, 150-250 μm, 250-500 μm) are identified. Lower similarity (<70%) between the living and dead assemblages are associated with areas impacted by organic matter and may be mainly ascribed to either loss of tests due to dissolution, currents remobilization and abrasion, or inclusion of allochthonous species transported by currents. This work suggests that the use of the living plus dead assemblages or dead assemblages can reduce the accuracy of the results if the work intends to evaluate the environmental conditions.

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Section: Characteristics Of the Living And Dead Total Foraminiferal Asupporting

confidence: 56%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Foraminiferal Analysismentioning

confidence: 99%

See 2 more Smart Citations

Similarity Between the Dead and Living Foraminiferal Assemblages in the Ne Sector of Guanabara Bay (Brazil)

et al. 2016

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“…Foraminiferal tests are commonly abundant in the sediments and they are easily collected in distinct Brazilian estuaries, bays and lagoons (Vilela et al, 2003(Vilela et al, , 2011Barbosa et al, 2005;Eichler et al, 2006;Machado & Araujo, 2014). Foraminiferal studies in the central and northeast regions of the Guanabara Bay pointed out the occurrence of bioindicator species and similarity between dead and living assemblages (Eichler et al, 2014;Martins et al, 2016aMartins et al, , 2016b. The use of foraminiferal assemblages and bioindicator species bring good responses in the evaluation of the pollution effects, in special the damages caused by hydrocarbons (Bates & Spencer, 1979;Alve, 1991;Yanko et al, 1994;Debenay et al, 2000;Samir, 2000).…”

Section: Introductionmentioning

confidence: 99%

Assembleia e Bioindicadores de Foraminíferos para Avaliação do Impacto Antropogênico na Baía de Guanabara, Rio de Janeiro, SE Brasil

2017

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In January 2000, Guanabara Bay in Rio de Janeiro experienced a major oil spilling caused by a break down in one PETROBRAS oil pipeline. Over than 1.3 tons of fuel oil escaped into the bay water in the northern region. Studies of foraminiferal taphonomic assemblages in sediment samples collected on three periods in the same stations, before and after the spilling, were important for the pollution impact evaluation during eight years.

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The recent evolution of the salt marsh ‘Pantano Grande’ (NE Sicily, Italy): interplay between natural and human activity over the last 3700 years

Palli,

Monaco,

Bini

et al. 2023

J Quaternary Science

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Combined natural processes and human activities shaped the late Holocene landscape history in many Mediterranean regions. This is especially true with areas subjected to specific human interest, such as coastal areas morphologically suitable to the establishment of harbours. Here, we test the hypothesis on the location of the Roman harbour Portus Trajectus in Peloro Cape (NE Sicily, Italy) and describe the evolution of the area over the last 3700 years through lithostratigraphic, geochemical, meiofauna and microfossil analyses performed on a new sediment core recovered from the coastal salt marsh Pantano Grande (aka Lago di Ganzirri). The age–depth model was developed on radiocarbon dates and geochemical fingerprinting of two tephra layers. Results indicate that the area underwent dramatic changes ca. 650 bce. The anthropogenic impact of Greek colonies may have contributed to modifying the coastal environment of Peloro Cape due to their widespread impact on natural resources. This happened at many localities in the Mediterranean, indicating the magnitude of impact of the Greek colonies over the landscape. According to our results, it is unlikely that the current Pantano Grande basin was used as a harbour in Roman times, although the presence of a harbour in the nearby Pantano Piccolo marsh cannot be excluded. Pantano Grande had been isolated from the sea for more than 2000 years. Human intervention in the 19th century halted that isolation and provided the background for the ecological, economic and social functions the salt marsh performs today.

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Controlling Factors on the Abundance, Diversity and Size of Living Benthic Foraminifera in the Ne Sector of Guanabara Bay (Brazil)

Cited by 12 publications

References 28 publications

Similarity Between the Dead and Living Foraminiferal Assemblages in the Ne Sector of Guanabara Bay (Brazil)

Similarity Between the Dead and Living Foraminiferal Assemblages in the Ne Sector of Guanabara Bay (Brazil)

Assembleia e Bioindicadores de Foraminíferos para Avaliação do Impacto Antropogênico na Baía de Guanabara, Rio de Janeiro, SE Brasil

The recent evolution of the salt marsh ‘Pantano Grande’ (NE Sicily, Italy): interplay between natural and human activity over the last 3700 years

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