Assessment of marine ecosystem degradation based on studying the geological significances of bottom sediments in Sharm Obhur, north Jeddah, Saudi Arabia

الملخص EN

Our investigations focus on the significance of texture, fauna, minerals and chemical characteristics of bottom sediments of Sharm Obhur.

The back reef zones were subjected to filling, dredging and cutting processes for constructional and urbanization purposes.

Shores morphology and sediment properties are changed.

The geological study emphasized the nature, composition and chemical characteristics of sediment veneer in addition to the impact of human activity on the environmentally sensitive area like Sharm Obhur.

Sediments are believed to be the last sink for contaminants that reach the sea.

It is therefore, sedimentary regime to investigate and understand the depositional pattern of sediments.

The study proved that Sharm Obhur bottom environment and its shores suffered deterioration due to uncontrolled development.

Heavy metals; Zn, Cu, Ni, Cd beside minor elements; Fe and Mn have been increased in bottom sediments most probably due to human activities.

The fine sediments are favourable site for the fixation of organic matter and trace elements.