Benthic Foraminifera and the flux of organic carbon to the seabed

Loubere, Paul; Fariduddin, Mohammad

doi:10.1007/0-306-48104-9_11

Cited by 71 publications

(61 citation statements)

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“…The pos i tive re lation ship be tween ju ve niles' pop u la tion and sed i ment grain-size might sug gest that coarse-grained sed i ments may better support the re pro duc tion of ga metes and the sur vival of ju ve niles when com pared with fine-grained sed i ments. Coarse-grained sed i ments also of fer fa vour able con di tions to ben thic foraminifera in terms of pro vid ing hab i tat to the flora (e.g., microalgae and bac te rial films) that ul ti mately pro vides food/nutri ents to the liv ing pop u la tion (Loubere and Fariduddin, 1999;Ward et al, 2003;Diz et al, 2004;Top ping et al, 2006). Lastly, high in er tia of the first prin ci ple com po nent (i.e.…”

Section: Fig 6 Q-mode Pca Ordination Diagram Plotting Samplesmentioning

confidence: 99%

Seasonal variations, environmental parameters, and standing crop assessment of benthic foraminifera in eastern Bahrain, Arabian Gulf

Arslan

Kaminski

Tawabini

et al. 2015

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Sea sonal vari a tions, en vi ron men tal pa ram e ters and stand ing crop as sess ment of ben thic foraminifera in east ern Bah rain, Ara bian Gulf Liv ing ben thic foraminifera in a rel a tively un pol luted site off shore Bah rain in the Ara bian Gulf, were stud ied to de ter mine the sea sonal vari abil ity of their pop u la tions, as well as en vi ron men tal pa ram e ters that may af fect their dis tri bu tion. The max i mum foraminiferal den sity was ob served dur ing win ter with the as sem blages pri mar ily dom i nated by rotaliids and sec ond arily by miliolids. The high pop u la tion is at trib uted to an in creased num ber of ju ve niles. A re la tion ship be tween sed i ment grain-size and the foraminiferal den sity re veals that ju ve niles were most abun dant on coarse-grained sandy sub strate and less abundant on fine-grained sub strates. In spring, the foraminiferal den sity de creased, and the low est val ues were ob served dur ing sum mer. The pop u la tion in creased again in au tumn with high est ju ve nile/adult ra tios. More over, re sults of rel a tive abundance and spe cies con sis tency show that Am mo nia and Glabratellina are con sis tent from the shal low est to the deep est station, whereas miliolids oc curred only at deeper sta tions. The num bers of Peneroplidae and Elphidium also in creased along the depth transect. En vi ron men tal char ac ter iza tion re veals that al though the site is sub ject to eutrophication caused by nitrates and sul fates, pol lu tion caused by hy dro car bons and heavy met als is not sig nif i cant. The as sess ment of 63 heavy metals showed that none of the met als had con cen tra tions that ex ceed in ter na tion ally ac cepted norms (the de vised level of Ef fect Range -Low), but with high con cen tra tion of stron tium. The lack of a sig nif i cant en vi ron men tal ef fect of heavy met als is con firmed by the Foraminiferal Ab nor mal ity In dex of <2%. Like wise, no hy dro car bon con tam i na tion was de tected in the wa ter or sed i ment sam ples. We con clude that the site in Bah rain is not yet ad versely af fected by hu man de vel op ment, and there fore can pro vide base line in for ma tion for fu ture com par i son and as sess ment of foraminiferal as sem blages in con tam inated zones of the Ara bian Gulf.

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Section: Fig 6 Q-mode Pca Ordination Diagram Plotting Samplesmentioning

confidence: 99%

Seasonal variations, environmental parameters, and standing crop assessment of benthic foraminifera in eastern Bahrain, Arabian Gulf

Arslan

Kaminski

Tawabini

et al. 2015

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“…Biotic factors. such as the life-history characteristics of individual species, competition, and predation, The benthic foraminiferal response to organic carbon flux is well documented (Loubere and Fariduddin, 1999;Murray, 2001). Benthic foraminiferans have been shown to feed on bacteria, diatoms and other microalgae (Bernhard andBowser, 1992, Lipps, 1983;Schwab and Hofer, 1979), all of which are components of the microbial biofilm that coats the seagrass blades (PI.…”

Section: Field and Laboratory Protocolsmentioning

confidence: 99%

“…Some of the factors that potentially impact the epiphytic foraminiferal populations off Twin Cays include an influx of nutrients from the surrounding mangroves during the wet season, an incursion of open-water species into the main channel during the dry season, and the thermal tolerances of individual species. The benthic foraminiferal response to organic carbon flux is well documented (Loubere and Fariduddin, 1999;Murray, 2001). Benthic foraminiferans have been shown to feed on bacteria, diatoms and other microalgae (l3ernhard and l3owser.…”

Section: Field and Laboratory Protocolsmentioning

confidence: 99%

Seasonal variation in epiphytic foraminiferal biotas from Thalassia seagrass habitats, Twin Cays, Belize

Richardson¹

2004

Atoll Research Bulletin

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“…These planktonic or benthic shelled organisms change their distribution, community structure and standing stocks in response to environmental changes (i.e., temperature, organic carbon flux to the sea floor, bottom current velocity, etc.). For example, the distribution of benthic foraminifera is mainly controlled by the variability of organic carbon flux to the sea floor in terms of quantity and quality of organic matter, as well as by redox conditions at the sediment-water interface and in the sedimentary porewaters (LOUBERE; FARIDUDDIN, 1999;HERGUERA;BERGER, 1991;SCHMIEDL et al, 2000;FONTANIER et al, 2002). Planktonic foraminifera distribution and abundance is controlled by multiple biotic and abiotic factors, including food availability, predation, algal symbionts, light, temperature, salinity, turbidity and circulation (HEMLEBEN et al, 1989).…”

Section: Introductionmentioning

confidence: 99%

Paleoproductivity changes during the Late Quaternary in the southeastern Brazilian upper continental margin of the Southwestern Atlantic

et al. 2010

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A B S T R A C TChanges in the Brazilian continental margin's oceanic productivity and circulation over the last 27,000 years were reconstructed based on sedimentological and microfaunal analyses. Our results suggest that oceanic paleoproductivity and the supply of terrigenous sediments to the Brazilian continental margin were higher during the Last Glacial Maximum (LGM) than during the Holocene. These changes may have been primarily influenced by significant sea level fluctuations that have occurred since the late Pleistocene. During the LGM, the lower sea level, higher productivity and lower sea-surface paleotemperatures may have been the result of the offshore displacement of the main flow of the Brazil Current. However, during the Holocene, the warm waters of the Brazil Current were displaced toward the coast. This displacement contributed to the increase in water temperature and prevented an increase in oceanic productivity. The decrease in terrigenous supply since the LGM could be related to the increase of the extension of the continental shelf and/or drier climatic conditions. R E S U M OMudanças na produtividade e circulação oceânica da margem continental Brasileira foram reconstituídas a partir de análises sedimentológicas e microfaunísticas realizadas em sedimentos de um testemunho representativo dos últimos 27 000 anos. Nossos dados sugerem maior produtividade oceânica e suprimento de sedimento terrígeno na área de estudo no Último Máximo Glacial (UMG) do que no Holoceno. Estas mudanças foram principalmente influenciadas por flutuações do nível relativo do mar. Durante o UMG, num cenário de nível relativo do mar mais baixo, a maior produtividade oceânica e menor temperatura da superfície do mar, podem ter sido produtos do deslocamento para o largo da Corrente do Brasil. No Holoceno, o deslocamento para a costa das águas quentes da Corrente do Brasil contribuiu para o aumento na temperatura da água e menor produtividade oceânica. A diminuição do aporte de sedimentos terrígenos desde o UMG pode estar relacionado ao aumento da extensão da plataforma continental e/ou a condições climáticas mais secas no continente.

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Benthic Foraminifera and the flux of organic carbon to the seabed

Cited by 71 publications

References 0 publications

Seasonal variations, environmental parameters, and standing crop assessment of benthic foraminifera in eastern Bahrain, Arabian Gulf

Seasonal variations, environmental parameters, and standing crop assessment of benthic foraminifera in eastern Bahrain, Arabian Gulf

Seasonal variation in epiphytic foraminiferal biotas from Thalassia seagrass habitats, Twin Cays, Belize

Paleoproductivity changes during the Late Quaternary in the southeastern Brazilian upper continental margin of the Southwestern Atlantic

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