文档介绍：The colorful coral reefs
The formation of coral reefs
Coral is one of the Marine coelenterates, which feed on prey on the ocean tiny plankton, can absorb the calcium in the water and carbon dioxide in the growth process, and then secrete limestone, into his shell of single coral only the grain size, they are a group of a group to gather together, the generations metabolism, growth, reproduction and continuously secrete limestone, and limestone after paction, petrochemical, forming islands and reefs, known as coral reefs.
Corals are biological, cnidaria door, included animals such as jellyfish, polyps, soft coral and sea anemones. Coral reefs, is made up of stone corals purpose coral bones of ponent is calcium carbonate (CaCO3).
The classification of the coral
According to the presence of symbiotic algae can be divided into: A class of reef-building corals are symbiotic algae, living in shallow areas of the sunshine; Another kind is no algae symbiosis of reef-building corals, live in the deep sea.
The classification of the coral reefs
According to form division are: fringing reef (fringing reef), the barrier reef and reef atoll, table and some transition type
瑚礁的分类
Fringing reef
Barrier reef
Barrier reef is also called the barrier reef, like long beach, around the outside of the farther offshore, and separated by a wide shallow seas and coast, or through a known as the waters of the as Australia's Great Barrier Reef
atoll
According to the settlement of Darwin's theory, the majority of coral reefs is through volcanic activity into basalt formed island development, due to falling of the land (or sea rise) and form atoll.
The formation of the Great Barrier Reef
Coral posture is exquisite, color and luster is beautiful, can only live in the year keep in 22 to 28 degrees of water, water temperature and water must be clean and transparent. Australia's northeast coast outer continental shelf waters are t