Mid-lower bathyal benthic foraminifera of the Campos Basin, Southeastern Brazilian margin: Biotopes and controlling ecological factors

Sousa, Silvia Helena de Mello e; Passos, Raquel Fernanda; Fukumoto, Marina Midori; Silveira, Ilson Carlos Almeida da; Figueira, Rubens César Lopes; Koutsoukos, Eduardo A. M.; Mahiques, Michel Michaelovitch de; Rezende, Carlos Eduardo de

doi:10.1016/j.marmicro.2006.05.003

Cited by 43 publications

(29 citation statements)

References 39 publications

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“…The benthic taxa are particularly important as direct bioindicators of physico-chemical parameters at the sea-bottom, and indirectly of the water column features (e.g., Van der Zwaan et al, 1990;Loubere, 1996;Lüning et al, 1998;Gooday and Hughes, 2002;Hanagata, 2004;Mello e Sousa et al, 2006;Mojtahid et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Comparison of benthic foraminifera and geochemical proxies in shelf deposits from the Upper Jurassic of the Prebetic (southern Spain)

Reolid

Martı́nez-Ruiz

2013

Journal of Iberian Geology

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Comparison of the stratigraphic distribution of major and trace elements, used as proxies for palaeoproductivity and redox conditions, and benthic foraminifera from Oxfordian shelf deposits of the External Prebetic (Betic Cordillera, South Spain) allows us to recognise two sedimentary cycles, both characterised by initial enhanced productivity and decreasing oxygen availability in the seabottom, and a subsequent decreasing productivity with a recovering in oxygenation during the second half of each cycle. Dysoxic conditions appear to coincide with maximums in marine surface productivity, thus suggesting that oxygen depletion may be linked to greater consumption rather than restricted circulation. The boundary between the two cycles is characterised by low contents of redox-sensitive elements and lower TOC content and Sr/Al, P/Ti, Ca/Al and Ba/Al ratios, indicating well oxygenated sea-bottom, lower productivity and lower organic matter accumulation. The geochemical proxies have also revealed as a valuable tool for interpreting the stratigraphic fluctuations of benthic foraminiferal assemblages, as well as for evaluating the palaeoecology of the main genera. Spirillina is adversely influenced by oxygen depletion independently of food availability. Ophthalmidium presents very good correspondence with palaeoproductivity fluctuations, and tolerated low oxygen levels in the sediment-water interface. Reophax was an opportunist that proliferated after adverse conditions when oxygenation and food availability were limiting factors. The variability in the microhabitat depth inside the sediment of Reophax favoured adaptation to adverse conditions. Lenticulina shows behaviour similar to Reophax. Finally, Ammobaculites shows a low degree of relation with the palaeoproductivity proxies, and is intolerant with respect to low oxygen values in shallow infaunal microhabitats.

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Section: Introductionmentioning

confidence: 99%

Comparison of benthic foraminifera and geochemical proxies in shelf deposits from the Upper Jurassic of the Prebetic (southern Spain)

Reolid

Martı́nez-Ruiz

2013

Journal of Iberian Geology

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“…The dominant species observed in the samples from the outer continental shelf (cores A3 and A4), B. marginata and G. subglobosa, were associated with Angulogerina angulosa, Bolivina doniezi, Bolivina g€ oesi, Bolivina elongata, Bolivina minima, Bolivina ordinaria, Bolivina striatula, Bolivina subspinescens, Bolivina subaenariensis, Bulimina aculeata, Bulimina echinata, Bulimina gibba, Cassidulina curvata, Cassidulina laevigata, Cassidulina norcrossi, Uvigerina peregrina, and Uvigerina striata, which are typical of areas with high nutrient concentrations (Corliss, 1985;Corliss and Chen, 1988;Fariduddin and Loubere, 1997;Schmieldl et al, 1997;Morigi et al, 2001;Altenbach et al, 2003;Martins et al, 2006;Mello e Sousa et al, 2006;Eichler et al, 2008;Nagai et al, 2009;Soma De, 2010).…”

Section: Discussionmentioning

confidence: 99%

“…The siliciclastic sands that predominate over most of the outer shelf form extensive fields of sand waves. The mud content of these substrates is normally less than 5% Mello e Sousa et al, 2006).…”

Section: Regional Settingmentioning

confidence: 99%

Biofaciological zonation of benthic foraminifera of the continental shelf of Campos Basin, SE Brazil

Vieira

Koutsoukos

Machado

et al. 2015

Quaternary International

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“…16 A plataforma média da bacia é dominada por areia rica em feldspato e por carbonatos biogênicos. 17 A área de estudo foi dividida entre região Norte e Sul, com 20 e 24 estações de coleta, respectivamente. O conteúdo de carbonato foi determinado por gravimetria em sedimento tratado com HCl (1 M), (1 g:10 mL).…”

Section: Parte Experimentalunclassified

Distribuição de Hg total e suas associações com diferentes suportes geoquímicos em sedimentos marinhos da margem continental brasileira: Bacia de Campos - Rio de Janeiro

Araujo¹,

Almeida²,

Salomão³

et al. 2010

Quím. Nova

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Mid-lower bathyal benthic foraminifera of the Campos Basin, Southeastern Brazilian margin: Biotopes and controlling ecological factors

Cited by 43 publications

References 39 publications

Comparison of benthic foraminifera and geochemical proxies in shelf deposits from the Upper Jurassic of the Prebetic (southern Spain)

Comparison of benthic foraminifera and geochemical proxies in shelf deposits from the Upper Jurassic of the Prebetic (southern Spain)

Biofaciological zonation of benthic foraminifera of the continental shelf of Campos Basin, SE Brazil

Distribuição de Hg total e suas associações com diferentes suportes geoquímicos em sedimentos marinhos da margem continental brasileira: Bacia de Campos - Rio de Janeiro

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