The goals of this work are:- An assessment of the vulnerabilities of Lebanese marine ecosystems to the impacts of climate change mainly to sea-level rise and water temperature increasing.- An evaluation of options to adapt of these potential impacts.- Develop data and information that can be used at the national, regional and global level by decision makers or scientific community.- This is also a part of an International assessment meeting government's obligations under article 3 of the UNFCC to reduce vulnerability to climate change.- Species composition changes- Community structure changes- Assessment of the implications of accelerated sea level rise in order to anticipate the need for action. Identification of the types of problems that that Lebanon has to face- How to adapt to these incremental future changes.- Provide a base for a more global assessment of the vulnerability of coastal regions .