scholarly journals The Microbiome of the Red Sea Coral Stylophora pistillata Is Dominated by Tissue-Associated Endozoicomonas Bacteria

2013 ◽  
Vol 79 (15) ◽  
pp. 4759-4762 ◽  
Author(s):  
Till Bayer ◽  
Matthew J. Neave ◽  
Areej Alsheikh-Hussain ◽  
Manuel Aranda ◽  
Lauren K. Yum ◽  
...  
Keyword(s):  
Red Sea ◽  
Intimate Relationship ◽  
Stylophora Pistillata ◽  
Content Type

ABSTRACTEndozoicomonasbacteria were found highly associated with the coralStylophora pistillata, and these bacteria are also ubiquitously associated with diverse corals worldwide. NovelEndozoicomonas-specific probes revealed thatEndozoicomonasbacteria were abundant in the endodermal tissues ofS. pistillataand appear to have an intimate relationship with the coral.

Iron and sulphur speciation and cycling in the sediments of marine systems located in the arid environment: Case of the northern Red Sea

2021 ◽  
pp. jgs2021-027
Author(s):  
Valeria Boyko ◽  
Jürgen Pätzold ◽  
Alexey Kamyshny
Keyword(s):  
Red Sea ◽  
Water Depth ◽  
Iron Content ◽  
Gulf Of Aqaba ◽  
Earth System ◽  
Content Type ◽  
Reactive Iron ◽  
The Earth ◽  
Sulphur Cycle ◽  
Supplementary Material

High fluxes of iron minerals associated with aeolian dry deposition may result in anomalously high reactive iron content and fast reoxidation of hydrogen sulphide in the sediments that prevents pyrite formation and results in “cryptic” sulphur cycle. In this work, we studied cycling of iron and sulphur in the deep-water (> 800 m water depth) sediments of the Red Sea and its northern extension, Gulf of Aqaba. We found that reactive iron content in the surface sediments of the Gulf of Aqaba and the Red Sea is high, while the content of sulphur-bound iron is very low and decreases with water depth. The presence of pyrite traces and zero-valent sulfur as well as isotopic compositions of sulphate and pyrite, which are consistent with sulphate reduction under substrate-limiting conditions, suggest that cryptic sulfur cycling is likely to be a result of fast reoxidation of hydrogen sulfide rather than microbial sulfate reduction suppression. In the sediments of Shaban Deep, which are overlain with hyper-saline hydrothermal brine, low reactive iron and high organic carbon contents result in a non-cryptic sulphur cycle characterized by preservation of pyrite in the sediments.Thematic collection: This article is part of the Sulfur in the Earth system collection available at: https://www.lyellcollection.org/cc/sulfur-in-the-earth-systemSupplementary material:https://doi.org/10.6084/m9.figshare.c.5508155

scholarly journals Erythrobacter pelagi sp. nov., a member of the family Erythrobacteraceae isolated from the Red Sea

2012 ◽  
Vol 62 (Pt_6) ◽  
pp. 1348-1353 ◽  
Author(s):  
Hui-xian Wu ◽  
Pok Yui Lai ◽  
On On Lee ◽  
Xiao-jian Zhou ◽  
Li Miao ◽  
...  
Keyword(s):  
16S Rrna ◽  
16S Rrna Gene ◽  
Red Sea ◽  
Type Species ◽  
Sequence Similarity ◽  
Rrna Gene ◽  
Phenotypic Properties ◽  
Content Type ◽  
Link Type ◽  
Type Strains

A novel Gram-negative, aerobic, catalase- and oxidase-positive, non-sporulating, non-motile, rod-shaped bacterium, designated strain UST081027-248T, was isolated from seawater of the Red Sea. Phylogenetic analysis based on 16S rRNA gene sequences showed that strain UST081027-248T fell within the genus Erythrobacter . Levels of 16S rRNA gene sequence similarity between the novel strain and the type strains of Erythrobacter species ranged from 95.3 % (with Erythrobacter gangjinensis ) to 98.2 % (with Erythrobacter citreus ). However, levels of DNA–DNA relatedness between strain UST081027-248T and the type strains of closely related species were below 70 %. Optimal growth of the isolate occurred in the presence of 2.0 % NaCl, at pH 8.0–9.0 and at 28–36 °C. The isolate did not produce bacteriochlorophyll a. The predominant cellular fatty acids were C17 : 1ω6c, summed feature 8 (C18 : 1ω6c and/or C18 : 1ω7c) and C15 : 0 2-OH. The genomic DNA G+C content of strain UST081027-248T was 60.4 mol%. Phenotypic properties and phylogenetic distinctiveness clearly indicated that strain UST081027-248T represents a novel species of the genus Erythrobacter , for which the name Erythrobacter pelagi sp. nov. is proposed. The type strain is UST081027-248T ( = JCM 17468T = NRRL 59511T).

Eutrophication may compromise the resilience of the Red Sea coral Stylophora pistillata to global change

2018 ◽  
Vol 131 ◽  
pp. 701-711 ◽  
Author(s):  
Emily R. Hall ◽  
Erinn M. Muller ◽  
Tamar Goulet ◽  
Jessica Bellworthy ◽  
Kimberly B. Ritchie ◽  
...  
Keyword(s):  
Global Change ◽  
Red Sea ◽  
Stylophora Pistillata

Abu Dhabi will pivot to ‘soft power’ security policies

2021 ◽  
Keyword(s):  
United States ◽  
Red Sea ◽  
Soft Power ◽  
The United States ◽  
Security Policies ◽  
Abu Dhabi ◽  
Special Forces ◽  
Content Type ◽  
Military Engagement

Significance UAE military engagement abroad since the 1990s has earned it the nickname ‘Little Sparta’. Its activities included a lengthy mission alongside NATO forces in Afghanistan and special forces-led interventions in Libya and Yemen. Impacts Increased COVID-19 vaccine diplomacy could be an important component of the Emirati soft power approach. UAE purchases of expensive weapons and maintenance of Red Sea basing options will focus on the Iran threat. Defence industrial ties will strengthen with the United States and Israel.

Absorption and utilization of radiant energy by light- and shade-adapted colonies of the hermatypic coral Stylophora pistillata

1984 ◽  
Vol 222 (1227) ◽  
pp. 203-214 ◽  
Keyword(s):  
Quantum Yield ◽  
Absorption Coefficient ◽  
Red Sea ◽  
Radiant Energy ◽  
Quantum Yields ◽  
Hermatypic Coral ◽  
Specific Absorption Coefficient ◽  
Low Light ◽  
Stylophora Pistillata ◽  
Photosynthetic Rates

The specific absorption coefficient for chlorophyll a ( k c ) was measured in zooxanthellae from light- and shade-adapted colonies of the hermatypic coral, Stylophora pistillata from the Red Sea. These data, together with measurements of photosynthetic rates and irradiance, were used to compare the quantum yields of photosynthesis in these corals. Quantum yields varied from 0.10 CO 2 per quantum at low light to less than 0.001 CO 2 per quantum at maximal irradiances. Shade-adapted corals had higher pigment content, which allowed them to have twice as much light harvesting capability as light-adapted corals. In all cases, however, the quantum yield of the light-adapted corals was higher by a factor of about 1.5.

Profundibacterium mesophilum gen. nov., sp. nov., a novel member in the family Rhodobacteraceae isolated from deep-sea sediment in the Red Sea, Saudi Arabia

2013 ◽  
Vol 63 (Pt_3) ◽  
pp. 1007-1012 ◽  
Author(s):  
Pok Yui Lai ◽  
Li Miao ◽  
On On Lee ◽  
Ling-Li Liu ◽  
Xiao-Jian Zhou ◽  
...  
Keyword(s):  
Saudi Arabia ◽  
16S Rrna ◽  
16S Rrna Gene ◽  
Red Sea ◽  
Type Species ◽  
Rrna Gene ◽  
The Novel ◽  
Content Type ◽  
Link Type ◽  
The Family

A slow-growing, strictly aerobic, Gram-negative, coccus bacterial strain, designated KAUST100406-0324T, was isolated from sea-floor sediment collected from the Red Sea, Saudi Arabia. The catalase- and oxidase-positive strain was non-sporulating and only slightly halophilic. Optimum growth occurred at 20–25 °C and at pH values ranging from 7.0 to 8.0. The major cellular fatty acids of the strain were unsaturated C18 : 1ω6c and/or C18 : 1ω7c, C18 : 1ω7c 11-methyl and C16 : 1ω7c and/or C16 : 1ω6c. The major polar lipids were phosphatidylglycerol, phosphatidylethanolamine and two unidentified phospholipids. Ubiquinone 10 was the predominant lipoquinone. The DNA G+C content of strain KAUST100406-0324T was 64.0 mol%. Phylogenetic analysis of 16S rRNA gene sequences revealed that the novel strain belonged to the family Rhodobacteraceae of the class Alphaproteobacteria but formed a distinct evolutionary lineage from other bacterial species with validly published names. The 16S rRNA gene sequence of the novel strain was distantly related, but formed a monophyletic cluster with, those of bacteria from two moderately halophilic genera, Hwanghaeicola and Maribius . The similarity of the sequence between the novel strain KAUST100406-0324T and the type strains Hwanghaeicola aestuarii Y26T (accession number FJ230842), Maribius pelagius B5-6T (DQ514326) and Maribius salinus CL-SP27T (AY906863) were 94.5 %, 95.2 % and 95.3 %, respectively. Based on the physiological, phylogenetic and chemotaxonomic characteristics presented in this study, we propose that this strain represents a novel species of a new genus in the family Rhodobacteraceae , for which the name of Profundibacterium mesophilum gen. nov., sp. nov. was proposed, with KAUST100406-0324T ( = JCM 17872T  = NRRL B-59665T) as the type strain.

scholarly journals Comprehensive Genomic Analyses of the OM43 Clade, Including a Novel Species from the Red Sea, Indicate Ecotype Differentiation among Marine Methylotrophs

2015 ◽  
Vol 82 (4) ◽  
pp. 1215-1226 ◽  
Author(s):  
Francy Jimenez-Infante ◽  
David Kamanda Ngugi ◽  
Manikandan Vinu ◽  
Intikhab Alam ◽  
Allan Anthony Kamau ◽  
...  
Keyword(s):  
Red Sea ◽  
Novel Species ◽  
Phylogenetic Analyses ◽  
Niche Differentiation ◽  
Content Type ◽  
Nadh:Quinone Oxidoreductase ◽  
Distinct Cluster ◽  
The Family ◽  
Phylogenomic Analyses ◽  
Cultivation Techniques

ABSTRACTThe OM43 clade within the familyMethylophilaceaeofBetaproteobacteriarepresents a group of methylotrophs that play important roles in the metabolism of C1compounds in marine environments and other aquatic environments around the globe. Using dilution-to-extinction cultivation techniques, we successfully isolated a novel species of this clade (here designated MBRS-H7) from the ultraoligotrophic open ocean waters of the central Red Sea. Phylogenomic analyses indicate that MBRS-H7 is a novel species that forms a distinct cluster together with isolate KB13 from Hawaii (Hawaii-Red Sea [H-RS] cluster) that is separate from the cluster represented by strain HTCC2181 (from the Oregon coast). Phylogenetic analyses using the robust 16S-23S internal transcribed spacer revealed a potential ecotype separation of the marine OM43 clade members, which was further confirmed by metagenomic fragment recruitment analyses that showed trends of higher abundance in low-chlorophyll and/or high-temperature provinces for the H-RS cluster but a preference for colder, highly productive waters for the HTCC2181 cluster. This potential environmentally driven niche differentiation is also reflected in the metabolic gene inventories, which in the case of the H-RS cluster include those conferring resistance to high levels of UV irradiation, temperature, and salinity. Interestingly, we also found different energy conservation modules between these OM43 subclades, namely, the existence of the NADH:quinone oxidoreductase complex I (NUO) system in the H-RS cluster and the nonhomologous NADH:quinone oxidoreductase (NQR) system in the HTCC2181 cluster, which might have implications for their overall energetic yields.

Israeli-Jordanian water deal leaves Palestinians dry

2015 ◽  
Keyword(s):  
World Bank ◽  
Red Sea ◽  
Water Exchange ◽  
Dead Sea ◽  
Palestinian Authority ◽  
Content Type ◽  
Water Sharing ◽  
The North ◽  
The Dead ◽  
Local Water

Subject The implications of the Red Sea-Dead Sea plan. Significance Israel and Jordan on February 26 signed an agreement to facilitate water-sharing and address the depletion of the Dead Sea, which is receding at a rate of about a metre per year. The 900 million dollar World Bank-sponsored 'Seas Canal' deal consists of two main aspects: local water exchange deals, with Jordan providing Israel with desalinated water from Aqaba in exchange for bluewater from the Sea of Galilee in the north; and saltwater transfer from the Red Sea to the Dead Sea. The Palestinian Authority is not party to the agreement, and awaits a separate deal with Israel. Impacts Prospects for Palestinian-Israeli water negotiations have drastically decreased. Jordan will still need to agree further desalination and cooperation deals in order to meet demand. Water saving efforts will be pushed aside in favour of much more costly desalination. Desalination powered by burning fossil hydrocarbons accelerates global warming.

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