Great Barrier Reef

its because the range of humans uses made of the water catchment area adjacent to the great barrier reef,water ,quality ,has declined owing to the sediment and chemical runoff from farming ,and to loss of coastal wetlands which are the natural filters.

Fishing is dangerous for the Great Barrier Reef as many rare species of fish are being killed, which one day will become extinct. Furthermore, even just throwing litter into these waters will kill the habitats if the fish and will eventually. I was studying this topic last week in science and my science teacher told me that over the last 20 years, the reef size has gne down by 27% which is down the fact that people are damging it by pollution or fishing. Hope this helps!

That depends upon how quickly mankind destroys it. If it is maintained and protected it could last indefinitely.

This is the world's largest coral reef, the Great Barrier Reef. It is over 2300 km in length, and the only living organism visible from space. The Great Barrier Reef lies off Australia's northeast coast, in the Coral Sea.

Well, there are a lot of limiting factors, but one I do know is: if there is an over abundance of fish and sea animals, the water will become less clear. Then the bacteria will start to die off, thus, killing the coral reefs, which will mean the fish and other sea life will have to find a different place to live.

A very interesting question indeed.

The Great Barrier reef is not owned by any commercial entity or private party. However as it is in Australian waters, a significant portion of it has been designated as a marine park by the Australian government, and it is managed by the Great Barrier Reef Marine Park Authority, a federal division, in collaboration with the Queensland Parks and Wildlife Service, and Queensland Fisheries, which are subdivisions of the Queensland state government.

1.6 Million people visit that location each year.

The Great Barrier Reef was built by natural means, with years and years of living coral building upon the skeletons of other coral, but in conjunction with a particular type of algae.

The corals that build reefs are not single animals. Coral is made up of colonies comprised of many individual animals called polyps, which join together. Coral polyps are a little like sea anemones, having tentacles that extend outwards, but they are not actually anemones.

Corals which create coral reefs have a symbiotic relationship with algae known as zooxanthellae. This algae, which lives within the tissues of the coral, causes a photosynthetic reaction which enables the polyps to make skeletons about three times faster in the light than in the dark. This means the corals deposit skeletons faster than the environment can remove it, and these skeletons build upon each other over time, creating a coral reef.

THE BIOTIC - are living components of an ecosystems

THE ABIOTIC-are non living components of an ecosystems

Ecosystems a specific place where biotic or living components depends on abiotic or non living components

CORAL REEFS BIOTIC-oyster,sea grasses,shellfishes,clownfishes,starfishes

CORAL REEFS ABIOTIC -rock,minerals,amount of sunlight reaching the coral reef ,water

reference: living things and the

environment EXPLORING AND PROTECTING

OUR WORLD 6

According to the Great Barrier Reef Marine Park Authority, there are about 1625 species of fish that live in and around the Great Barrier Reef, not including the shark species. Of these, 1400 are coral reef species.

In addition, there are over 3000 species of molluscs, 630 species of echinoderm such as starfish and sea urchins, 14 known species of sea snakes, 30 species of whales and dolphins, dugongs and 133 species of sharks and rays.

Considered one of the great natural wonders of the world, the Great Barrier Reef sits off the northeast coast of Australia. It is located in the Coral Sea and extends for a length of around 2300 km down the coast of the eastern state of Queensland. It is actually a series of reefs and atolls, with its northern end just south of Papua New Guinea. It is the largest coral reef in the world. Australia has almost one-fifth of the world's reef area most of which is located in the Great Barrier Reef. It is the largest structure on earth created by living things, hosts millions of ocean-living creatures, and can be seen from space.

The Great Barrier Reef is not found in any coast: it is found off the coast. Specifically, it is found off the eastern coast of Queensland, Australia. The Great Barrier Reef runs for about 2300 km, roughly parallel with the Queensland coast.

Luna Park in Sydney

The Great Barrier Reef off the coast of Queensland, Australia, is the largest coral reef in the world, around 2300km long, with its coral cays and islands spreading over 300,000 square kilometres. Considered one of the wonders of the natural world, the Reef is unique for being visible from Earth's orbit.

It was placed on the World Heritage List in 1981 because of all its colourful marine life and its unique ecosystem. The Great Barrier Reef is significant for its scientific value: the health of the Reef points to the health of the ocean, and the creeks and rivers that feed into it, as well as signifying the general effects of pollution. It is of considerable concern that numbers of unique species such as dugong and loggerhead turtles have declined significantly since the 1960s, largely due to human intervention. The Reef shelters many endangered species.

On an economic note, the Great Barrier Reef generates $AU2 billion in tourism dollars every year. All countries trade on their commodities, and tourism is one of Australia's. To lose the reef would be to lose an enormous source of trade for Australia.

Any reef is dangerous for sailors. Reefs contain sharp coral outcrops which may lie just beneath the surface. Olden-style ships could be easily damaged on the sharp coral, and it was very difficult for ships to navigate through the reef. Even the most experienced sea-captains who knew the Reef could make a small mistake, and find his ship run aground and requiring repair.

They are different terms. Amps refer to the amount of energy, volts refers to electrical "potential".

Amps * Volts = Watts.

So if you don't already know a little about electricity, it just became more confusing. One volt of power into 1 ohm resistance equals 1 amp of flow Volts = electrical pressure, Amps = current flow, ohms = amount of resistance in the circuit. dividing voltage by resistance gives you the amount of current. Dividing voltage by current gives you resistance. Muntiplying current by resistance gives you voltage If you know any 2 values, you can calculate the third. See "Ohms Law" on the internet for further reading.

Yes there was an oil spill in the Great Barrier Reef. More than two tons of liquid petroleum leaked into the southern part of the reef.

The Great Barrier Reef is shrinking, and it is unknown by how much. Climate scientists who subscribe to the theory of anthropogenic global warming (i.e. caused by man's activities) predict that the Great Barrier Reef may lose up to 95% of its coral by the middle of the current century. Although the coastline parallel to the Great Barrier Reef has been settled by Europeans for less then 200 years, these scientists believe that the Reef has been shrinking by 20% every 100 years.

Climate scientists who subscribe to the theory that global warming is cyclical perhaps have a less drastic view, as they believe that the coral will regenerate, as it has apparently done so in the past. It is a very emotive topic.

However, it should be noted that pollution and chemical runoff pose a very real threat to the reef. The water quality of the reef is affected by sediment and nutrients, and 80% of this is caused by cattle grazing on the land adjacent to the reef. Mud and chemical runoff tend to limit the sunlight that reaches the coral, causing it to die off, and they increase the macro-algae, which is a weed.

Tourism is a threat to the reef, as tourist boats damage the delicate framework of the reef; fishing and pollution left behind by visitors also is a threat.

Oil spills occasionally occur when captains of foreign vessels ignore the warnings about travelling around the reef, and venture too close (trying to save time), resulting in damage to their ships.

It should also be noted that some 40 species which live in and around the Great Barrier Reef are listed as endangered.

The largest fish in the Great Barrier Reef is the whale shark. These gentle giants can grow up to 40 feet in length and are filter feeders, primarily consuming plankton and small fish. They are often spotted in the waters of the Great Barrier Reef during their annual migrations.

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