The UAE's natural environment is diverse with four major varieties of ecosystems:
Desert ecosystem
Desert is the dominating landscape, stretching from the southern coast of Arabian Gulf to the uninhabited sands of the Empty Quarter (Rub Al Khali). To the east is the gravel plains bordering the Hajjar Mountains.
Mountains ecosystem
Hajjar's rugged mountains rise sharply to an elevation of 2000 metres. Wadis or dry riverbeds open out onto fertile plains.
Coastal and marine ecosystem
The UAE's seas are home to a variety of fish, invertebrates and other marine animals. The southwest waters of Abu Dhabi and Marawah Marine Biosphere Reserve in Abu Dhabi, Jebel Ali in Dubai and Sir Bu Na'air Island and Khor Kalba in Sharjah are recognised by the UAE for their rich and unique environmental biodiversity and are of global biological and ecological importance. The marine habitat protects beaches from coastal erosion and plays a role in climate change mitigation.
Natural habitats of marine organisms are governed mostly by the type of surface, tides, water current, degree of wave exposure, temperature and salinity.
The marine life of the UAE is rich in fish, plants and corals. Over 500 different species of fish inhabit the Gulf waters, with many more existing in the Indian Ocean.
The Arabian Gulf is blessed with large populations of dugongs, dolphins (eight species) and marine turtles. The green turtle (Chelonia mydas) is the most common and feeds on the extensive sea grass beds found in shallow waters. Both green and hawksbill (Eretmochelys imbricata) turtles are known to nest on the beaches of UAE's main coast and islands.
Coral reefs and mangrove creeks are habitats for many marine creatures. These areas are important fish breeding grounds and feeding areas and they protect the shores from coastal erosion.
Damage to coastal developments, fishing nets, anchors and ignorant divers cause destruction of these areas. Coral reefs are sensitive to their environment. They take decades to regrow.
Dominant marine life forms in the UAE coasts include fish, marine mammals and marine reptiles.
Fish
At the entrance to the Arabian Gulf, the constriction and resultant strong currents of the Strait of Hormuz, influence the distribution of many species.
Marine mammals
Marine mammals are relatively common in the UAE's waters and include a great diversity. The two groups of marine mammals that are represented here are the whales and dolphins of the order Cetacea, and dugong of the order Sirenia.
Marine reptiles
These include sea turtles and sea snakes.
Sea turtles
Of the seven recognised species of marine turtles in the world, four live in the waters of the UAE. They are:
The olive ridley sea turtle (Lepidochelys olivacea)
Sea Snakes
Sea Snakes are found in the UAE's seas. There are at least seven species, all of which belong to one family, the Hydrophiidae. They are excellent swimmers and the laterally flattened tail makes them easily recognisable and distinguishes them from eels.
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The UAE's coasts
The UAE has two coastlines. The longer coast, at over 700 kilometres, excluding islands, faces in a north to north-westerly direction into the southern Arabian Gulf whilst the other, much shorter, coast, approximately 70 kilometres long, faces eastwards into the Gulf of Oman.
Much of the Arabian Gulf coastline is low-lying, flat and bordered by shallow water. While the coast of Gulf of Oman is rugged and eroding, with a higher proportion of hard rock.
The differences in climate along the two coasts has led to assemblages of marine organisms that are somewhat different, although both are of Indian Ocean origin.
Wetlands
The UAE has 10 sites designated as Wetlands of International Importance, Ramsar sites, with a surface area of 39,166 hectares. Some of these are:
Find more information wetlands in the UAE.
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