Sedimentary variations of geomorphic subenvironments at Al-Lith area, central-west coast of Saudi Arabia, Red Sea

Basaham, Ali S.; Gheith, A.; Khawfany, Ali A.; Sharma, Rahul; Hashimi, N.H.

doi:10.1007/s12517-012-0799-8

Cited by 14 publications

(7 citation statements)

References 19 publications

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“…Most of these studies have been performed on deep sediment records (Arz et al, 2003(Arz et al, , 2006Biton et al, 2008;Rohling et al, 2008;Edelman-Furstenberg et al, 2009;Trommer et al, 2010Trommer et al, , 2011. However, numerous studies have been carried out along the Red Sea coast (Moustafa et al, 2000;Hein et al, 2011;Bantan, 2013, 2015;Basaham et al, 2014;Ghandour et al, 2016;Al-Zubieri et al, 2017;Nabhan and Yang, 2018;Pavlopoulos et al, 2018;Bantan et al, 2019Bantan et al, , 2020. Most of these latter studies dealt with past environmental changes based on micropaleontology (Abu-Zied and Bantan, 2013Bantan, , 2015Pavlopoulos et al, 2018;Bantan et al, 2019), and coral reefs (Moustafa et al, 2000;Manaa et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Mid-Late Holocene Paleoenvironmental and Sea Level Reconstruction on the Al Lith Red Sea Coast, Saudi Arabia

et al. 2021

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Late Quaternary paleoenvironments are of particular interest to understand how the Earth System’s climate will respond to the undramatic changes during this period, compared with the broader glacial-interglacial variations. In this study, a shallow sediment core (2.84 m long) retrieved from the Red Sea coastal zone in northern Ghubbat al Mahasin, south of Al-Lith, Saudi Arabia, is used to reconstruct the mid-Late Holocene paleoenvironments and sea level based on a multiproxy approach. Remote sensing data, sedimentary facies, benthic foraminiferal assemblages, δ18O and δ13C stable isotopes, elemental composition and 14C dating were utilized. The stratigraphy of the core shows three distinctive depositional units. The basal pre 6000 year BP unit consists of unfossiliferous fine to medium sand sharply overlain by black carbonaceous mud and peat, suggesting deposition in a coastal/flood plain under a warm and humid climate. The middle unit (6000-3700 year BP) records the start and end of the marine transgression in this area. It consists of gray argillaceous sand containing bivalve and gastropod shell fragments and a benthic foraminiferal assemblage attesting a lagoonal or quiet shallow marine environment. The upper unit (<3700 year BP) consists of unfossiliferous yellowish-brown argillaceous fine-grained sands deposited on an intertidal flat. Both middle-and upper-units stack in a regressive shallowing upward pattern although they may be separated by a hiatus. The overall regressive facies and the stable isotopic data are consistent with a late Holocene sea-level fall and a change to a more arid climate.

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Section: Introductionmentioning

confidence: 99%

Mid-Late Holocene Paleoenvironmental and Sea Level Reconstruction on the Al Lith Red Sea Coast, Saudi Arabia

et al. 2021

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“…Jabal Kudumbul Island is subdivided into two principal geomorphic features, a volcanic mountain in the western zone of the island and the low-lying sandy shorelines in the eastern zone (Figure 1C). Winds, currents, and temperature are the main factors controlling the movement and distribution of sediments and the formation of various geomorphic landforms on the arid coast of the Red Sea (Basaham et al ., 2014; Nabhan and Yang, 2018).…”

Section: Resultsmentioning

confidence: 99%

“…These sedimentological and geomorphological characteristics of Quaternary deposits can be compared to those on humid volcanic islands and coasts (Davis and Fitzgerald, 2004; El-Sorogy, 2002, 2008; Mindrescu and Gradinaru, 2014; Mutaqin et al ., 2021; Oppenheimer, 2003; Tucker et al ., 2020). Sedimentary facies characteristics and processes on coasts with arid conditions have gained increasing interest in the last few decades because of climate changes, tourism projects, and economic projects such as wind energy production ( e.g ., Basaham et al ., 2014; El-Sorogy, Almadani, and Al-Dabbagh, 2016; Garzanti et al ., 2001; Nabhan and Yang, 2018, 2022; Petrovic et al ., 2022; Sen, 2008; Tawfik et al ., 2021). Most carbonate sediments in arid coasts exhibit different grain-size distributions due to abundant skeletal debris derived from reefs that are intensely affected by waves, currents, and wind.…”

Section: Introductionmentioning

confidence: 99%

Sedimentological and Geomorphological Characteristics of Jabal Kudumbul Island, Southeast Red Sea, Saudi Arabia

Nabhan,

Widinly,

Memesh

et al. 2023

Journal of Coastal Research

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A marine geological survey of the Quaternary volcanic island of Jabal Kudumbul in the rifted southeastern Red Sea in Saudi Arabia has been conducted for the first time. The survey aimed to document sedimentological and geomorphological characteristics from sample collection and interpretation of high-resolution satellite images taken in the last decade. Beach, sand dune, and sand sheet sedimentary facies types were identified. The volcanic mountain in the western zone of the island and the low-lying sandy shorelines in the eastern zone represent the main geomorphic landforms related to wave and current processes in the study area. The volcanic cone showed three volcano-stratigraphic facies units: basalt rocks, phreatomagmatic lapilli tuff, and vesicular basalt/scoria, indicating that they might have been formed during eruption and interaction between rising magma and shallow seas. The coastline constantly changes over time due to longshore processes and spring tides. A suite of complex wind, wave diffraction, longshore current, and biological processes and episodic synrifting in the area played dominant roles in facies and landscape creation and the overall development of Jabal Kudumbul Island. These findings provide important information for future studies on the arid islands in the Red Sea region beyond modern surficial deposits.

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“…Samples of sediment were collected from a fringing mangrove characterized by coarse sandy sediment, with a large part made by coral debris ( Basaham et al, 2014 ), which stands at the King Abdullah Economic City (KAEC), Saudi Arabia (22°24′N, 39°05′E; Supplementary Figure 1 ). The mangrove sediment has been used as inoculum for the cultivation experiments and three different media were used: (i) ONR7a, for 1 L: NaCl 22.79 g, Na 2 SO 4 3.98 g, KCl 0.72 g, NaBr 83 mg, NaHCO 3 31 mg, H 3 BO 3 27 mg, NaF 2.60 mg, NH 4 Cl 0.27 g, Na 2 HPO 4 × 7 H 2 O 89 mg, TAPSO 1.30 g, MgCl 2 × 6 H 2 O 11.18 g, CaCl 2 × 2 H 2 O 1.46 g, SrCl 2 × 6 H 2 O 24 mg and, FeCl 2 × 4H 2 O 2 mg; (ii) Mineral Salt Medium (MSM), for 1 L: Na 2 HPO 4 2.79 g, KH 2 PO 4 2 g, (NH 4 ) 2 SO 4 1 g, Ca(NO 3 ) 2 4H 2 O 0.05 g, ammonium iron(III) citrate 0.01 g and, MgSO 4 × 7H 2 O 0.02 g; (iii) filtered Red Sea water (FSW).…”

Section: Methodsmentioning

confidence: 99%

The identification of the new species Nitratireductor thuwali sp. nov. reveals the untapped diversity of hydrocarbon-degrading culturable bacteria from the arid mangrove sediments of the Red Sea

et al. 2023

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IntroductionThe geological isolation, lack of freshwater inputs and specific internal water circulations make the Red Sea one of the most extreme—and unique—oceans on the planet. Its high temperature, salinity and oligotrophy, along with the consistent input of hydrocarbons due to its geology (e.g., deep-sea vents) and high oil tankers traffic, create the conditions that can drive and influence the assembly of unique marine (micro)biomes that evolved to cope with these multiple stressors. We hypothesize that mangrove sediments, as a model-specific marine environment of the Red Sea, act as microbial hotspots/reservoirs of such diversity not yet explored and described.MethodsTo test our hypothesis, we combined oligotrophic media to mimic the Red Sea conditions and hydrocarbons as C-source (i.e., crude oil) with long incubation time to allow the cultivation of slow-growing environmentally (rare or uncommon) relevant bacteria.Results and discussionThis approach reveals the vast diversity of taxonomically novel microbial hydrocarbon degraders within a collection of a few hundred isolates. Among these isolates, we characterized a novel species, Nitratireductor thuwali sp. nov., namely, Nit1536T. It is an aerobic, heterotrophic, Gram-stain-negative bacterium with optimum growth at 37°C, 8 pH and 4% NaCl, whose genome and physiological analysis confirmed the adaptation to extreme and oligotrophic conditions of the Red Sea mangrove sediments. For instance, Nit1536T metabolizes different carbon substrates, including straight-chain alkanes and organic acids, and synthesizes compatible solutes to survive in salty mangrove sediments. Our results showed that the Red Sea represent a source of yet unknown novel hydrocarbon degraders adapted to extreme marine conditions, and their discovery and characterization deserve further effort to unlock their biotechnological potential.

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Sedimentary variations of geomorphic subenvironments at Al-Lith area, central-west coast of Saudi Arabia, Red Sea

Cited by 14 publications

References 19 publications

Mid-Late Holocene Paleoenvironmental and Sea Level Reconstruction on the Al Lith Red Sea Coast, Saudi Arabia

Mid-Late Holocene Paleoenvironmental and Sea Level Reconstruction on the Al Lith Red Sea Coast, Saudi Arabia

Sedimentological and Geomorphological Characteristics of Jabal Kudumbul Island, Southeast Red Sea, Saudi Arabia

The identification of the new species Nitratireductor thuwali sp. nov. reveals the untapped diversity of hydrocarbon-degrading culturable bacteria from the arid mangrove sediments of the Red Sea

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