BIO-GEOCHEMICAL STUDY OF SOME LAGOONAL FAUNA, RED SEA COAST, EGYPT

Sixty-three invertebrate species (19 foraminifers, 4 bryozoans, 20 gastropods and 20 bivalves) from four lagoons along the Red Sea coast have been identified, illustrated and their habitat, bio-and-paleogeographic distribution (if present) were done. TheyUm El-Howitat lagoon sediments are enriched in Fe, Mg, Pb, Co and Cu that attributed to the anthropogenic inputs, and recorded the highest total phosphorous content coming from the phosphate shipping in Abu Tartour harbor, in addition to the domestic and There is a relationship between the faunal diversity and the geochemistry of the studied lagoons. In Um El-Howitat lagoon, where the highest heavy metals content, and the total phosphorous content are recorded, it shows the relatively low diversity and al