In spite of the uncertainties surrounding the predicted climate changes, greenhouse gases seem to have accumulated in the atmosphere to such a level that the changes may have started already and their continuation may now be inevitable. The environmental problems associated with the potential impacts of expected climate change may prove to be among the major environmental problems facing the marine environment and adjacent coastal areas in the near future. The objectives of the study were :To examine on a regional basis the potential impacts of the projected sea level changes on coastal ecosystems, coral reefs, lagoons and coastal river flood plains and mangrovesto examine the possible effects of climatic change (particularly temperature elevations) on the terrestrial and aquatic ecosystems, with special reference to economically important species.