February 17, 2011

Great Barrier Reef, 7 Wonders, Wonders Of Nature, Wonders Of Australia, Australia Pics

The Great Barrier Reef is a site of remarkable variety and beauty on the north-east coast of Australia. It contains the world’s largest assortment of coral reefs, with 400 types of coral, 1,500 species of fish and 4,000 types of mollusc.

It also holds great scientific interest as the habitat of species such as the dugong (‘sea cow’) and the large green turtle, which are threatened with extinction.
The Great Barrier Reef is a site of remarkable variety and beauty on the north-east coast of Australia. It the world’s most extensive stretch of coral reef and is probably the richest area in terms of faunal diversity in the world.

Its great diversity reflects the maturity of an ecosystem which has evolved over millions of years on the north-east continental shelf of Australia.

The site contains a huge diversity of species including over 1,500 species of fish, about 360 varieties of hard coral, 5,000 species of mollusc, and more than 175 species of bird, plus a great diversity of sponges, anemones, marine worms and crustaceans, among others.

The reef system, extending to Papua New Guinea, the reef comprises some 2900 individual reefs of all sizes and shapes covering more than 20,000 km2, including 760 fringing reefs, which range in size from under 1ha to over 10,000 ha and vary in shape to offer the most spectacular marine scenery on Earth.

There are approximately 600 continental islands including many with towering forests and freshwater streams, and some 300 coral cays and unvegetated sand cays. A rich number of landscapes and seascapes, including rugged mountains with dense and diverse vegetation and adjacent fringing reefs, provide spectacular scenery.

Australia, Great Barrier Reef, Wonders Of Nature, Wonders Of Australia

The shape and structure of the people reefs show great variety. Two main classes may be defined: platform or patch reefs, caused by radial growth; and wall reefs, resulting from elongated growth, often in areas of strong water currents. İn addition there are many fringing reefs where the reef growth is established on subtidal rock of the mainland coast or continental islands.

The site includes major feeding grounds for the endangered dugong and nesting grounds of world importance to two endangered species of marine turtle, the green and the loggerhead, as well as habitat for four other species of marine turtle; given the severe pressures being added to these species elsewhere, the good Barrier Reef may be their last secure stronghold. It is also an important breeding area for humpback and other whale species.

A wide range of fleshy algae occurs, lots of that are small and inconspicuous but which are highly productive and are heavily grazed by turtles, fish, molluscs and sea urchins. In addition, algae are a significant element of reef building processes. 15 types of seagrass grow through the entire reef area forming over 3,000 km2 of seagrass meadows and providing an important food source for grazing animals, such as dugongs.

The Great Barrier Reef, in particular the northern sector, is very important in the historic and contemporary culture of the Aboriginal and Torres Strait Islander groups of the coastal areas of north-east Australia. This contemporary use of and association with the Marine Park plays a huge role in the repair off their cultures then there is a powerful spiritual reference to the ocean and its inhabitants.

Incoming search terms:

• great barrier reef australia
• great barrier reef
• australia great barrier reef
• barrier reef australia
• australia coral reef
• australien great barrier reef
• australian great barrier reef
• great barrier reef in australia
• The great barrier reef australia
• australia

• Barrier Reef Reserve System, Belize
• Kakadu National Park, Australia
• Lord Howe Island Group, Australia
• Tasmanian Wilderness, Australia