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The Caspian lowland desert ecoregion (WWF ID: PA1308) covers the north and southeast coasts of the Caspian Sea, including the deltas of the Volga River and Ural River in the northern region. While the region gets relatively low amounts of precipitation (less than 200 mm/year), wildlife is supported by the river estuaries and the sea itself.
In Iran, the Hyrcanian ecoregion comprises a long strip along the southern coast of the Caspian Sea and the northern slopes of the Alborz mountains. It covers parts of five provinces, from east to west: North Khorasan, Golestan (421,373 hectares (1,041,000 acres) being its south and southwest plus eastern regions of the Gorgan plain), Mazandaran, Gilan and Ardabil.
The North Caspian depression is part of the continental or semi-arid desert biome. The area receives 300 mm (12 in) of rain per year, on average, and less than 10% of the region is irrigated. The Caspian Depression is below sea level, consisting of large areas of marshlands in the eastern region.
The Central Asian southern desert ecoregion (WWF ID: PA1312) is an arid but ecologically active region between the east coast of the Caspian Sea and steppes at the base of the mountains of central Asia. Most of Turkmenistan and eastern Uzbekistan is in this ecoregion.
Astrakhan is located in the Caspian lowland desert ecoregion. This region, on the north and northeast shores of the Caspian Sea, is characterized by sand dunes and ridges, salt soil, clay deserts and in places solonchaks (shors) or salt pans of 30–40 cm thickness devoid of vegetation. Plant life is sparse but features highly specialized ...
There are also 270 coral species spread over an area of 1,000 hectares (2,500 acres). In addition, the marine fauna and flora are of 1,323 species including 44 species in the Red Data Book of Vietnam. The park has the richest diversity of 153 species of mollusc species, reported to be the highest for any island in Vietnam.
The Caspian Sea is the world's largest inland body of water, described as the world's largest lake and usually referred to as a full-fledged sea. [2] [3] [4] An endorheic basin, it lies between Europe and Asia: east of the Caucasus, west of the broad steppe of Central Asia, south of the fertile plains of Southern Russia in Eastern Europe, and north of the mountainous Iranian Plateau.
Azerbaijan, [a] officially the Republic of Azerbaijan, [b] is a transcontinental and landlocked country at the boundary of Eastern Europe and West Asia. [10] It is a part of the South Caucasus region and is bounded by the Caspian Sea to the east, Russia's republic of Dagestan to the north, Georgia to the northwest, Armenia and Turkey to the west, and Iran to the south.