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Summary Benthic coral reef communities were investigated on the Sanganeb-Atoll, 28 km off the coast of Port Sudan (Sudan, central Red Sea). Four test areas (5×5 m) were selected and marked in approx. 10 m depth along a transect running in SSW-NNE direction over the atoll and were mapped in 1980 and 1991. Detailed photographs were used for in situ verification of taxonomic composition of communities...
Boring patterns of microbial endoliths were analyzed in bivalve shells collected from different environments in the Northern Bay of Safaga on the Red Sea, Egypt. A total of 20 ichnotaxa have been recognized within 64 samples and evaluated on the basis of 250 scanning electron micrographs. The analysis of microorganisms in shells from the same depth profile has been performed separately. Morphological...
This study examines microendolithic community patterns in experimental carbonate blocks in shallow waters between 0 m and 30 m adjacent to Eilat, Israel. We set up two different habitats per depth: one in full light and one shaded. After 6 months of exposure we observed 23 species of which five are unknown to science and herein described as forms. Differences in community patterns between open and...
Excessive sedimentation is a major threat to coral reefs. It can damage or kill reef-building corals and can prevent the successful settlement of their planktonic larvae. The surgeonfish Ctenochaetus striatus feeds on rocky surfaces by sweeping loose material into its mouth with its flexible, broom-like teeth. In addition, it grasps and removes hard substrates with the aid of its special palate structure...
Ongoing microbialite formation is described at two previously unreported sites in southern Sinai, Egypt. Samples were collected in the peritidal tropical environment of Nabq Bay and Hidden Bay (southern Sinai, Egypt). Field observations and sample analyses show evidence of both sediment trapping and biostabilization in bacterial mucilaginous sheaths and microbially induced mineralization, producing...
Measures of diversity and ecology of marine invertebrate assemblages depend on a variety of factors including environmental conditions and methodological decisions. In this study, the influence of such factors on multi- and univariate assemblage parameters of molluscan death assemblages from the Gulf of Aqaba (Red Sea, Jordan) was evaluated. Sediment samples were collected at two coral reef types,...
The supratidal–intertidal sabkha of the Al-Kharrar area, Red Sea coast, Saudi Arabia, contains the evaporite minerals gypsum, anhydrite, and halite. Microbial mats flourish adjacent to the sabkha evaporites in tidal flats and pools of the Al Kharrar lagoon. Desiccation and decay of some microbial mats in tidal flat areas have led to precipitation of gypsum and halite there. The evaporite minerals...
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