عنوان مقاله [English]
Abstract: The Caspian Sea is the largest water basin that enclosed by land within Eurasia continent. This sea that referred to Caspian in the global map, has strategic importance because oil and gas storage and caviar fish. The most important problem that originated in bio geographical parameters is the lack of a determinate legal regime. According to the 1982 convention, only the littoral states are responsible for establishing of the closed sea Legal regime. The lack of consensus on which delimitation is suitable, Caspian has turned into one of the critical areas. One of these crises is the environmental problems. Economic problems of the newly established countries, cause the excessive use of marine resources, particularly oil and gas. Poor technology and lack of independent environmental monitoring of regional and global organizations, failure to comply with the standards required for the exploitation and transportation of oil and gas resources. In addition, various contaminants is severely threatened the Caspian Sea life.For this reason in this paper, by the librarian research, the role of bio geographical factors in the setting the regime right in the Caspian sea from the perspective of the political geography of the sea was investigated.Factors that threaten the Caspian Sea bio geographical plays an important role in determining the legal regime and include oil pollution, ship and floating population (urban, rural), industrial facilities, artificial islands, environmental contaminants and rivers and in accordance with the 1982 Convention and also due to the geographical conditions of the Caspian Sea, were evaluated. The results show that the countries of Azerbaijan, Russia, Kazakhstan and Turkmenistan to produce more oil pollution and setting the regime right in the Caspian sea that's likely to oppose their activities. However, after Russia and Kazakhstan, Iran has most polluted rivers, but due to the beaches damage caused by oil pollution is agree to determining of the pollution deterrent legal regime of the sea. Keywords: Caspian Sea, Legal regime, pollutant, Biogeography conditions, the sea convention.