Environmental properties of the southern Gulf of Aqaba, Red Sea, Egypt

Dorgham, Mohamed Moussa; El‐Sherbiny, Mohsen M.; Hanafi, M.H.

doi:10.12681/mms.297

Cited by 11 publications

(7 citation statements)

References 19 publications

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“…Temperatures recorded during the current study for the second period (2015-2016) were in agreement with results of previous records at the Red Sea as Abdelmongy and El-Moselhy (2015), who recorded a summer temperature of 29.25 o C and a winter temperature of 17.96 o C, 28.2 o C at summer and 20.17 at winter (Madkour, 2013) and 30.5 o C at summer and 22.8 o C at winter (Dorgham et al, 2012).…”

Section: Discussionsupporting

confidence: 93%

Effect of climate change on the reproduction pattern of sea urchin Echinometra mathaei at the Gulf of Suez, Red Sea, Egypt.

Hasan¹

2019

Egypt. J. of Aquatic Biolo. and Fish.

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Reproduction global warming temperature Gulf of Suez The reproduction patterns of E. mathaei's population at the Gulf of Suez were investigated during two periods, the first was 1992-1993 and the second was 2015-2016. The effects of elevating temperature during these periods on reproduction periodicities were studied. The surface water temperature showed an increase during the period 2015-2016 by 1.36 o C at summer and 1.24 o C at winter from that recorded during 1992-1993. In 1992-1993, individuals of E. mathaei had one definite lengthy spawning season, which were expressed by main spawning period from June to August with maximum gonadal activity in July. On contrary, there was an obvious shift at the spawning season during 2015-2016; individuals of E. mathaei exhibit more than one breeding season. However, they are resting

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Section: Discussionsupporting

confidence: 93%

Effect of climate change on the reproduction pattern of sea urchin Echinometra mathaei at the Gulf of Suez, Red Sea, Egypt.

Hasan¹

2019

Egypt. J. of Aquatic Biolo. and Fish.

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“…DO in the study area is almost similar to the recorded DO in other regions of Red Sea [69,70]. DO concentration of south part of Gulf of Aqaba, Red Sea, Egypt is 6.6-7 mgL −1 which was reported the same as in the surface water [71]. The minor variations of physicochemical characteristics including salinity, pH, and DO were found by this study.…”

Section: Seawater Characteristicssupporting

confidence: 86%

Assessment of heavy metal contamination in water, sediments, and Mangrove plant of Al-Budhai region, Red Sea Coast, Kingdom of Saudi Arabia

Al-Mur

2021

Journal of Taibah University for Science

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This study investigates the hydrographic parameters and contamination status of zinc (Zn), iron (Fe), copper (Cu), manganese (Mn), lead (Pb), cadmium (Cd), vanadium (V), and nickel (Ni), etc. in surface water, surficial sediments, and mangrove tree tissues (Avicennia marina). Samples were collected from nine sites in Al-Budhai area of Red Sea coast of Jeddah. The trend values of metal contamination factor were Ni (3.23) > Cd (2.99) > Pb (2.86) > Zn (2.69). Translocation factor (TF) of the metals showed Avicennia marina tissues have a dominant role in the phytoremediation process through toxic metal uptake.

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“…In a study of bio-optics along the axis of the Gulf, Stambler (2005) found that the concentrations of Chl a remained consistently less than 0.4 µg L −1 . Dorgham et al (2012) determined the concentrations of Chl a down to 100 m at a coastal station (Sharm El-Sheikh) at the Strait of Tiran over an annual cycle and observed that the concentrations ranged from 0.1 to 0.33 µg L −1 . The only instance when they were high (up to 1.2 µg L −1 ) was in the spring at depths >70 m.…”

Section: Gulf Of Aqabamentioning

confidence: 99%

Phytoplankton and Primary Production in the Red Sea

Qurban

Wafar

Heinle

2018

Springer Oceanography

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Studies on phytoplankton and primary production in the Red Sea are few and far between, and even in the few that have been conducted, most cover only a limited area. The last review of phytoplankton and primary production by Ismael (2015) reaffirmed the oligotrophic nature of the Red Sea and the north-to-south increasing trend in chlorophyll concentrations and rates of primary production. Also, in the above review the inventory of phytoplankton species was enlarged to 389 from the earlier record of 181 by Halim (1969). Since then, four research cruises undertaken in the Saudi Arabian waters of the Red Sea (2012)(2013)(2014)(2015) have added a considerable amount of data on the patterns of primary production in the Red Sea and this review builds on that of Ismael (2015) by presenting the new findings. The levels of biomass and production in the Red Sea are relatively low, with a discernable north-south gradient. Their distribution is influenced by anticyclonic eddies, which entrain the nutrient-rich Gulf of Aden Intermediate Water across the Red Sea basin. Biomass and production in regions of eddy currents are twice as high as those elsewhere, suggesting that the notion that the Red Sea is oligotrophic needs to be revised. The injection of nutrients into the euphotic zone in the eddy boundary currents favours the proliferation of producers across a range of size classes rather than of a single class. As with any nutrient-poor tropical sea, the primary production in the Red Sea is supported up to 80% by nano-and picoplankton. Though the contributions of microplankton (diatoms and dinoflagellates) appear to be less significant, the phytoplankton diversity is quite high.With additional records of 74 species from the samples in the four cruises, the current inventory of phytoplankton stands at 463 species. The review also provides suggestions on prospective avenues of phytoplankton research in the Red Sea waters. These include extensive spatial and seasonal coverage of primary production, the importance of benthic production, a better evaluation of nitrogen (N) fixation by Trichodesmium spp., the role of allochthonous nutrient sources (such as dust) in increasing the productivity, additional inventories of phytoplankton species, especially those belonging to the nanoand picoplankton size classes, and the assessment of the importance of the heterotrophy and microbial loop in the food chain dynamics. Experimental studies on the physiology of phytoplankton that already live at extreme conditions of temperature and salinity in the Red Sea could also help to understand how phytoplankton in other seas would react to the effects of global warming and climate change.

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Environmental properties of the southern Gulf of Aqaba, Red Sea, Egypt

Cited by 11 publications

References 19 publications

Effect of climate change on the reproduction pattern of sea urchin Echinometra mathaei at the Gulf of Suez, Red Sea, Egypt.

Effect of climate change on the reproduction pattern of sea urchin Echinometra mathaei at the Gulf of Suez, Red Sea, Egypt.

Assessment of heavy metal contamination in water, sediments, and Mangrove plant of Al-Budhai region, Red Sea Coast, Kingdom of Saudi Arabia

Phytoplankton and Primary Production in the Red Sea

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