barrier reif
-------------------------------------------------------------------------------- Authors Comments: An essay about the great barrier reef in Australia The Great Barrier Reef is the biggest group of coral reefs in the world. It stretches along the coast on the north-east part of Australia. It is called the Great Barrier Reef because it creates a barrier between the Pacific Ocean and the coast. The Great Barrier Reef is a scattering of thousands of individual reefs. The reefs is on the World Heritage List made by UNESCO, because of its size and its many different plants and fishes. The reef lies in the Great Barrier Reef Marine Park, the world's
The reefs on the top are only a few thousands years old, but most of these reefs are built upon a foundation of older reefs. The water temperature in the south seldom falls below 20 C. Location and size The Great Barrier Reef stretches north and north-west from Gladstone, Queensland, to a point in the Gulf of Papua. Marine Life The Great Barrier Reef consists of billions of smal animals called coral polyps and plants called coralline algae. The existing reefs were at this time limestone hills rising from the plain. Climate The climate of the Great Barrier Reef varies. When the land was covered by the rising sea, a number of mountain ranges were cut of from the main land to become continental islands. There are 616 islands in the reef region. ------------------------------------------------------------------------**Bibliography**. In the north there is tropical conditions and high humidity and a wet season around January. Angelfish, cod, manta rays, mackerel, butterfly fish and surgeon fish all live in reef waters. In the south it is cooler, subtropical to temperate conditions. But the most of it have developed over the last 2 million years.
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