Textural Characteristics, Mineralogy and Fauna in the Shore Zone Sediments at Rabigh and Sharm al-Kharrar, Eastern Red Sea, Saudi Arabia

Gheith, A.; Abou-Auf, M.

doi:10.4197/mar.7-1.10

Cited by 18 publications

(14 citation statements)

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“…The uniform grain size distribution, obtained along cores IV and V collected from the area of Rabigh, indicated a stable depositional environment for a long period of time. The presence of nearly 96% of sand in core IV indicates the rough activity at the open water and the action of Longshore currents allowing the washout of finer particles (Gheith and Abou Ouf 1996). Cores collected from Yanbu showed the minimum grain size of all cores.…”

Section: Sediment Typesmentioning

confidence: 98%

“…The carbonate contents in cores VI and VII collected from Yanbu, showed almost similar vertical profiles of uniform distribution along the cores. According to Gheith and Abou Ouf (1996), the seafloor of the nearshore zone in coastal zone off Saudi Arabia is generally flat and is covered by a thin layer of unconsolidated sediments overlying the consolidated reefal limestone.…”

Section: Calcium Carbonate and Total Organic Mattermentioning

confidence: 99%

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Metal pollution records in core sediments of some Red Sea coastal areas, Kingdom of Saudi Arabia

Badr

El-Fiky

Mostafa

et al. 2008

Environ Monit Assess

174

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In the last three decades, the industrial and human activities in the coastal area of Saudi Arabia have increased dramatically and resulted in the continuous invasion of different types of pollutants including heavy metals. Seven sediment cores were collected from three major industrialized areas; Jeddah, Rabigh and Yanbu, along the coast of Saudi Arabia to determine the spatial and temporal distribution of metals and to assess the magnitude of pollution and their potential biological effects. Sediments were analyzed for texture, calcium carbonate contents, organic matter and metals (Al, Fe, Mn, Cd, Cr, Cu, Ni, Pb and Zn). Some metals like, Cr, Mn, Ni and Zn, were enriched in the upper 15 cm of core samples (recent deposition of sediments). Cadmium concentrations showed high fluctuations with depth and reverse pattern to that for Al, Fe and Mn which indicated land based sources of this element to the studied areas. Elevated concentrations of lead were recorded in the bottom layers of cores in Jeddah that indicated the most dramatic increase in usage of gasoline in early 1970s. The calculated contamination factors (CF's) were found in the following sequences: Cd > Pb > Ni > Cu > Zn > Cr > Mn for all studied areas. Results of Pollution Load Index (PLI) revealed that Jeddah is the most polluted area, followed by Rabigh while Yanbu is the least contaminated area. Except for Ni, the concentrations of most metals in the majority of sediment samples were believed to be safe for living organisms. As no data were available on the concentration of metals in core sediments in the coastal area of Saudi Arabia, the results of this study would serve as a baseline against which future anthropogenic effects can be assessed.

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Section: Sediment Typesmentioning

confidence: 98%

Section: Calcium Carbonate and Total Organic Mattermentioning

confidence: 99%

Metal pollution records in core sediments of some Red Sea coastal areas, Kingdom of Saudi Arabia

Badr

El-Fiky

Mostafa

et al. 2008

Environ Monit Assess

174

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“…In particular, we sampled mangrove leaves from four locations in the Central Red Sea, including Thuwal Island, Economic City lagoon, Petro Rabigh and Khor Alkharar (Table 1, Figure 1). Away from anthropogenic sources of nutrients, the mangrove stands at Khor Alkharar, Economic City lagoon and Thuwal Island are pristine: King Abdullah Economic City, about 40 km south of Rabigh, is a new and fast-growing urban development; Khor Alkharar lagoon lies on the coastal plain northwest of Rabigh and is connected to the adjacent Red Sea by a narrow inlet on its northwestern side (Gheith and Abou-ouf, 1996;AlFarawati, 2011); on Thuwal Island, A. marina grows on shallow soils of weathered coral (Balk et al, 2015). In contrast, the city of Rabigh hosts a large petrochemical complex and the mangrove stand are likely influenced by the industrial environment.…”

Section: Study Areamentioning

confidence: 99%

Nutrient Limitation in Central Red Sea Mangroves

2016

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As coastal plants that can survive in salt water, mangroves play an essential role in large marine ecosystems (LMEs). The Red Sea, where the growth of mangroves is stunted, is one of the least studied LMEs in the world. Mangroves along the Central Red Sea have characteristic heights of ∼2 m, suggesting nutrient limitation. We assessed the nutrient status of mangrove stands in the Central Red Sea and conducted a fertilization experiment (N, P and Fe and various combinations thereof) on 4-week-old seedlings of Avicennia marina to identify limiting nutrients and stoichiometric effects. We measured height, number of leaves, number of nodes and root development at different time periods as well as the leaf content of C, N, P, Fe, and Chl a in the experimental seedlings. Height, number of nodes and number of leaves differed significantly among treatments. Iron treatment resulted in significantly taller plants compared with other nutrients, demonstrating that iron is the primary limiting nutrient in the tested mangrove population and confirming Liebig's law of the minimum: iron addition alone yielded results comparable to those using complete fertilizer. This result is consistent with the biogenic nature of the sediments in the Red Sea, which are dominated by carbonates, and the lack of riverine sources of iron.

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“…Table 1 shows the sediment type at the various sampling locations. The sediment texture is sandy at MSS, TB and IA indicating of the high energetic regime of alongshore currents allowing the washout the finer particles [6,17]; the hotel area has sandy silt sediments and the sediments are PLB are dominated by clays. The fine sediments at PBL are a result of substantial amounts of phosphate powder deposited at the site from dust ore blowing during the process of shipment.…”

Section: Sediment Typementioning

confidence: 99%