Essay on Coral Reef

2566 Words Jul 18th, 2003 11 Pages
CORAL REEFS

Almost every one of us have heard and most of you have seen the Coral reefs but did you know what actually these are:
As a mariner its important to know about the marine life, that was one reason I have chosen this topic for my today's short presentation.

GM, my scheme of presentation will be as flashed:

DEFINATION OF CORAL REEF
DIFFERENCE BETWEEN CORAL AND CORAL POLYP
WHERE WE CAN FIND CORAL
CONSTRUCTION OF CORAL REEFS
CONDITIONS FOR GROWTH OF CORAL REEFS
TYPES OF CORAL REEFS
THREAT TO CROAL REEFS
WHAT SHOULD A MARINER DO IN CORAL RICH AREAS
FUTURE OF CORAL REEFS
CONCLUSION

What is a coral reef?
Coral reefs are huge structures made of limestone that is deposited by living things. There are
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The coral reefs existing today began growing as early as 50 million years ago. Most established coral reefs are between 5,000 and 10,000 years old. Although size sometimes indicates the age of a coral reef, this is not always true. Different species of coral grow at different rates, depending on water temperature, oxygen level, amount of turbulence, and availability of food

How is a coral reef constructed?
Coral reefs are complex, multi-story structures with holes and crevices shared by various creatures. If a coral reef can be thought of as a metropolis of the sea, then a coral colony can be thought of as an apartment building with many different rooms and hallways that house different marine species. Not all coral species build reefs. The actual architects of coral reefs are hard or stony corals, which are referred to as hermatypic or reef-building corals. As the polyps of stony corals grow, they produce limestone for their skeletons. When they die, their skeletons are left behind and are used as foundations for new polyps, which build new skeletons over the old ones. An actual coral mound or tree is composed of layer upon layer of skeletons covered by a thin layer of living polyps.

The best place for coral to grow is in waters with the temperature being between 21 and 29 degrees. They do grow in hotter and colder places, but the growth rate there are very slow. Corals like shallow waters, where there is lots of sunlight filters through to their

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