Impact of late Quaternary environmental changes on deep-sea benthic foraminiferal faunas of the Red Sea

Badawi, Amani; Schmiedl, Gerhard; Hemleben, Christoph

doi:10.1016/j.marmicro.2005.08.002

Cited by 41 publications

(34 citation statements)

References 64 publications

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“…Studies of benthic Foraminifera are numerous, because benthic foraminiferal assemblages are widely used to characterize recent and to reconstruct past environmental conditions, employing various tools such as diversity analyses (e.g., Debenay, 1991;Almogi-Labin et al, 1996;Armynot du Châtelet et al, 2004;Badawi et al, 2005;Mojtahid et al, 2009), multivariate analyses (e.g., Frontalini et al, 2009;Mojtahid et al, 2009;Cosentino et al, 2013;Minhat et al, 2016), and transfer function approaches (e.g., Horton et al, 1999;Gehrels, 2000;Leorri et al, 2010;Kemp et al, 2015;Milker et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

The Effect of Size Fraction in Analyses of Benthic Foraminiferal Assemblages: A Case Study Comparing Assemblages From the >125 and >150 μm Size Fractions

Weinkauf

Milker

2018

Front. Earth Sci.

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Benthic foraminiferal assemblages are employed for past environmental reconstructions, as well as for biomonitoring studies in recent environments. Despite their established status for such applications, and existing protocols for sample treatment, not all studies using benthic Foraminifera employ the same methodology. For instance, there is no broad practical consensus whether to use the >125 or >150 µm size fraction for benthic foraminiferal assemblage analyses. Here, we use early Pleistocene material from the Pefka E section on the Island of Rhodes (Greece), which has been counted in both size fractions, to investigate whether a 25 µm difference in the counted fraction is already sufficient to have an impact on ecological studies. We analyzed the influence of the difference in size fraction on studies of biodiversity as well as multivariate assemblage analyses of the sample material. We found that for both types of studies, the general trends remain the same regardless of the chosen size fraction, but in detail significant differences emerge which are not consistently distributed between samples. Studies which require a high degree of precision can thus not compare results from analyses that used different size fractions, and the inconsistent distribution of differences makes it impossible to develop corrections for this issue. We therefore advocate the consistent use of the >125 µm size fraction for benthic foraminiferal studies in the future.

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Section: Introductionmentioning

confidence: 99%

The Effect of Size Fraction in Analyses of Benthic Foraminiferal Assemblages: A Case Study Comparing Assemblages From the >125 and >150 μm Size Fractions

Weinkauf

Milker

2018

Front. Earth Sci.

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“…At the same time as our G. glutinata peak, Reichart et al (1997) report dry glacial-like conditions from Murray Ridge in the Arabian Sea, and there is evidence for increased NE winter monsoonal winds over the Arabian Sea (Montoya et al, 2000), which are held responsible for a productivity maximum (Rostek et al, 1997;Ivanova et al, 2003). Benthic foraminiferal faunas from the Red Sea (Badawi et al, 2005) and the Gulf of Aden (AlmogiLabin et al, 2000) also suggest a short productivity peak under enhanced NE Monsoon conditions. The sensitivity of Red Sea circulation to atmospheric forcing is perhaps best demonstrated by the fact that the relative abundance changes of G. glutinata not only follow the changes in winter insolation, but even reflect the higher amplitude of the insolation changes during MIS 5 relative to those during the Holocene (Fig.…”

Section: Oceanography Of Mis 5 After the Sea-level Maximummentioning

confidence: 53%

“…For the age model development, oxygen isotope data for KL23 (Badawi et al, 2005) and high resolution data for KL9 and KL11 (Rohling et al, 2008b) were correlated. Recently, Rohling et al (2009) correlated a high resolution δ 18 O record of KL9 with the Antarctic Temperature anomaly ( T AA ) record (Jouzel et al, 2007).…”

Section: Age Modelmentioning

confidence: 99%

Sensitivity of Red Sea circulation to sea level and insolation forcing during the last interglacial

et al. 2011

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Abstract. This study investigates the response of Red Sea circulation to sea level and insolation changes during termination II and across the last interglacial, in comparison with termination I and the Holocene. Sediment cores from the central and northern part of the Red Sea were investigated by micropaleontological and geochemical proxies. The recovery of the planktic foraminiferal fauna following high salinities during marine isotopic stage (MIS) 6 took place at similar sea-level stand (∼50 m below present day), and with a similar species succession, as during termination I. This indicates a consistent sensitivity of the basin oceanography and the plankton ecology to sea-level forcing. Based on planktic foraminifera, we find that increased water exchange with the Gulf of Aden especially occurred during the sea-level highstand of interglacial MIS 5e. From MIS 6 to the peak of MIS 5e, northern Red Sea sea surface temperature (SST) increased from 21 • C to 25 • C, with about 3 • C of this increase taking place during termination II. Changes in planktic foraminiferal assemblages indicate that the development of the Red Sea oceanography during MIS 5 was strongly determined by insolation and monsoon strength. The SW Monsoon summer circulation mode was enhanced during the termination, causing low productivity in northern central Red Sea core KL9, marked by high abundance of G. sacculifer, which -as in the Holocene -followed summer insolation. Core KL11 records the northern tip of the intruding intermediate water layer from the Gulf of Aden and its planktic foraminifera fauna shows evidence for elevated productivity during the sea-level highstand in the southern central Red Sea. By the time of MIS 5 sea-level regression, elevated orCorrespondence to: G. Trommer (gabi.trommer@gmx.de) ganic biomarker BIT values suggest denudation of soil organic matter into the Red Sea and high abundances of G. glutinata, and high reconstructed chlorophyll-a values, indicate an intensified NE Monsoon winter circulation mode. Our results imply that the amplitude of insolation fluctuations, and the resulting monsoon strength, strongly influence the Red Sea oceanography during sea-level highstands by regulating the intensity of water exchange with the Gulf of Aden. These processes are responsible for the observation that MIS 5e/d is characterized by higher primary productivity than the Holocene.

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“…1), which contains aplanktonic zones with inorganic aragonite at about 50-85 cm (MIS2), 355-400 cm (MIS6) and 1370-1415 cm (MIS12), and a less extreme zone with inorganic aragonite but some planktonic foraminiferal continuation at 1080-1120 cm (MIS10). These core chronologies were derived from δ 18 O studies associated with de- Badawi et al (2005). Where samples were missing within glacial maxima but locations were clear, the stage was estimated by interpolation.…”

Section: Discussionmentioning

confidence: 99%

Red Sea isolation history suggested by Plio-Pleistocene seismic reflection sequences

Mitchell

Ligi²,

Rohling

2015

Earth and Planetary Science Letters

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Impact of late Quaternary environmental changes on deep-sea benthic foraminiferal faunas of the Red Sea

Cited by 41 publications

References 64 publications

The Effect of Size Fraction in Analyses of Benthic Foraminiferal Assemblages: A Case Study Comparing Assemblages From the >125 and >150 μm Size Fractions

The Effect of Size Fraction in Analyses of Benthic Foraminiferal Assemblages: A Case Study Comparing Assemblages From the >125 and >150 μm Size Fractions

Sensitivity of Red Sea circulation to sea level and insolation forcing during the last interglacial

Red Sea isolation history suggested by Plio-Pleistocene seismic reflection sequences

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