[ study on the biological phenomenon of greenness, light emission and odours in Aden beaches]

ABSTRACT

The study aims to disclose the causes of greenness, emission of light and harmful odours in Aden beaches. Water samples were collected during the period of January March 2006, and were examined by light microscope connected to CCD camera. Isolation and identification of microalgae were carried directly by light microscope, while isolation and identification of bacteria were carried by using several bacterial culture. The result has revealed the presence of green gelatinous colonies, the diameter of one colony is about 1 cm. The colonies contain microalgae called Phyaeocystis sp. and two bacteria species that belong to Vibrio genus V. fischeri and V. harveyi. The source of Bioluminescence and the harmful odours are resulting from bacterial metabolic activity, while the greenness are from the algae