Communities and Microhabitats of Living Benthic Foraminifera From the Tropical East Atlantic: Impact of Different Productivity Regimes

Licari, Laëtitia; Schumacher, Stefanie; Wenzhöfer, Frank; Zabel, Matthias; Mackensen, Andreas

doi:10.2113/0330010

Cited by 98 publications

(51 citation statements)

References 71 publications

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“…The ecology of G. neosoldanii is consistent with the life strategy of the associated species H. elegans that belong to the shallow infauna (e.g. De Stigter et al 1998;De Rijk et al 1999;Fontanier et al 2002;Licari et al 2003). Consequently, this fauna indicates adaptation to more eutrophic conditions and relatively high oxygen concentrations and represents a considerably lower trophic level when compared with the fauna that is positively loading PCA 1.…”

Section: Results and Analysissupporting

confidence: 62%

Palaeoceanography of the Miocene (Tortonian) deposits of the Pre-Apulian zone, western Greece, as recorded by foraminifer and stable isotope records

Drinia

Antonarakou

2011

Int J Earth Sci (Geol Rundsch)

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An integrated faunal and geochemical dataset has been generated by the study of a late Miocene (early Tortonian) sedimentary section outcropping at Manassi, Levkas Island (eastern Mediterranean). Quantitative analysis of benthic foraminifers from the 25-m-thick section indicates changes of bottom palaeoecological conditions in this part of the eastern Mediterranean, during the analyzed time interval. Benthic foraminifer assemblages are typical of a bathyal environment and testify to relatively oxygenated conditions with low to moderate food supply alternating with periods with an increase in organic matter content. The long-term palaeoceanographic analyses indicate an anti-estuarine circulation model based on the benthic foraminifer and stable isotope results, which evolved in a strong estuarine circulation. The positive relationship existing between the plankton d 18 O and d 13 C, in most of the record, agrees well with the hypothesis of a variable contribution of runoff. In three stratigraphic levels, samples record heavy bottom water d 18 O and d 13 C values and light surface d 18 O values, representing a wet, warm, estuarine climate with a stratified water column. In two stratigraphic levels, samples have depleted d 13 C and d 18 O values for both surface and bottom waters. These two samples represent wet, warm climates with some ocean mixing and stratification. The stable isotope signal of foraminifer tests from the Manassi section was influenced by the global temperature changes, but the local factors also played an important role. The palaeoenvironments derived from stable isotope analysis in this study are interpreted as responses to the local tectonic instability together with monsoon intensities that enhanced continental runoff, characteristic for the time interval studied in the study area. Due to the limited data available from this study, no correlations with the precessional, obliquity, or eccentricity cycles can be made.

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Section: Results and Analysissupporting

confidence: 62%

Palaeoceanography of the Miocene (Tortonian) deposits of the Pre-Apulian zone, western Greece, as recorded by foraminifer and stable isotope records

Drinia

Antonarakou

2011

Int J Earth Sci (Geol Rundsch)

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“…Perhaps the most likely explanation for unexpected patterns is that resource quality cannot be determined from the satellite-derived measure of POC flux used in this analysis. Refractory material, which is more common on the shelf, is a poor food resource compared with labile organic matter (Licari et al 2003, Fontanier et al 2008. In general, there is a large spread of standing crop for a given value of POC flux at all depths, which could also be explained by variation resulting from these factors.…”

Section: Role Of Poc In Determining Foraminiferal Standing Cropmentioning

confidence: 99%

Controls on the standing crop of benthic foraminifera at an oceanic scale

Jones¹,

Murray²

2017

Mar. Ecol. Prog. Ser.

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At present, there is very little basin-scale information on patterns of standing crop in marine organisms or their structuring forces. Understanding modern patterns and controls on foraminifera is particularly critical because of their abundance and importance in benthic systems, as well as their role as palaeoceanographic proxies. Here, we examine for the first time basin-scale patterns and predictors of benthic foraminiferal standing crop from the shelf to abyssal deep sea in the Atlantic Ocean and adjacent seas using a large database of 967 quantitative samples. Spatial regression analyses reveal that the flux of particulate organic matter is a major control on standing crop size across all depths investigated, with increasing food supply increasing fora mi ni feral standing crops. Other factors also play a role. Dissolved oxygen is significant at slope depths and negatively related to standing crop. Temperature and possibly salinity are locally significant factors in the abyss. This study demonstrates that productivity is important in describing foraminiferal standing crop at the basin scale, supporting its use as a palaeoceanographic proxy, but also demonstrates that other environmental variables are also likely important in controlling the standing crop and should be considered in reconstruction of Earth's past marine environment.

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“…De acordo com vários trabalhos (e.g. Herguera & Berger, 1991;Loubere, 1991Loubere, , 1994Loubere, , 1996Sen Gupta & MachainCastillo, 1993;Kaiho, 1994;Thomas et al, 1995;Jorissen, 1999;Fontanier et al, 2002;Tapia et al, 2008;Licari et al, 2003;Ovsepyan & Ivanova, 2009), a composição desta biofácies é francamente indicativa de um ambiente com baixa oxigenação de fundo combinada a elevadas concentrações de matéria orgânicas, possivelmente decorrentes de processos de eutrofização no ambiente. A composição desta associação sugere, ainda, uma redução paleobatimétrica e, os dados isotópicos de oxigênio, apontam para águas mais frias.…”

Section: P R O V a S Lamarckiana Gyroidinoides Nitidula Islandiellaunclassified

Foraminíferos bentônicos como indicadores bioestratigráficos no Quaternário superior da bacia de Campos

Barbosa¹

2010

Rev. bras. paleontol.

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-BENTHIC FORAMINIFERA AS BIOSTRATIGRAPHIC INDICATORS ON UPPER QUATERNARY OF CAMPOS BASIN. Benthic foraminifera are very useful as environmental indicators but provide less resolution concerning the biostratigraphy due to their usual long ranges. Nevertheless, there is a general consensus that the ecological sensibility of particular bathyal assemblages is an important framework to the time constraint. This study aims the proposition of a biostratigraphic zonation to the Upper Quaternary of Campos Basin, using the distribution and frequency patterns of benthic foraminifera as indicators of the major paleoclimatic events related to the glacial and interglacial stages of the last Quaternary glacial cycle. For this purpose, 64 samples from two piston cores drilled on the continental slope of Campos Basin, southwestern Brazil were analyzed. Three benthic biozones were recognized: Cibicidoides pachyderma, Nonionella auris and Gyroidinoides nitidula, which show a good correlation between studied cores and with the international ecozones X, Y and Z.

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Communities and Microhabitats of Living Benthic Foraminifera From the Tropical East Atlantic: Impact of Different Productivity Regimes

Cited by 98 publications

References 71 publications

Palaeoceanography of the Miocene (Tortonian) deposits of the Pre-Apulian zone, western Greece, as recorded by foraminifer and stable isotope records

Palaeoceanography of the Miocene (Tortonian) deposits of the Pre-Apulian zone, western Greece, as recorded by foraminifer and stable isotope records

Controls on the standing crop of benthic foraminifera at an oceanic scale

Foraminíferos bentônicos como indicadores bioestratigráficos no Quaternário superior da bacia de Campos

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