Exploring the microorganisms biodiversity associated with sponge species in the red sea through 18S ribosomal RNA gene sequencing.

Around the world, sponges play a significant role in marine ecosystems, and a wide variety of sponge species can be found in the coast of Red Sea of Saudi Arabia. The unique environmental conditions of the Red Sea, including warm, oligotrophic water and high salinity, have encouraged the growth of abundant sponge fauna. Our study aims to investigate the biodiversity, taxonomic composition, and phylogenetic relationships of eukaryotic organisms linked with sponges in the Red Sea off the coast of Saudi Arabia and infer the possible ecological roles and functional contributions of the identified eukaryotic taxa to sponge health and ecosystem functioning. The study investigated the microbial diversity, focusing on the genera Hyalosynedra sp., Navicula sp., Papiliocellulus sp., Psammodictyon sp., Pynococcus sp., Ostreococcus sp., Micromonas sp., and other unclassified species. Our metagenomic analysis and phylogenetic evaluation revealed a deep and diverse microbial community, with each genus performing significant ecological roles, including nutrient cycling, primary production, and contributing to marine food networks. Moreover, these genera display promising biotechnological prospects, including uses in bioremediation, biofuel production, and the synthesis of high-value biomolecules. Comparative analysis with other marine regions has focused on both the similarities and unique aspects of the Red Sea microbial community, which are influenced by its distinct environmental conditions. The gained findings contribute to a deeper understanding of the ecological dynamics in the Red Sea and open new avenues for biotechnological exploration in marine ecosystems.