珊瑚礁完全介绍英文版课件.ppt

1、.The colorful coral reefs.The formation of coral reefsCoral 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 survival.Every single coral only the

2、grain size,they are a group of a group to gather together,the generations metabolism,growth,reproduction and continuously secrete limestone,and together.The limestone after after compaction,petrochemical,forming islands and reefs,known as coral reefs.Corals are biological,cnidaria door,included anim

3、als such as jellyfish,polyps,soft coral and sea anemones.Coral reefs,is made up of stone corals purpose coral skeletons.The bones of main component is calcium carbonate(CaCO3).The classification of the coralAccording to the presence of symbiotic algae can be divided into:A class of reef-building cor

4、als 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 reefsAccording to form division are:fringing reef(fringing reef),the barrier reef and reef atoll,table and some transition t

5、ype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 lagoon.Such as Australias Great Barrier Reef.atoll According to the settl

6、ement of Darwins 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

7、 in 22 to 28 degrees of water,water temperature and water must be clean and transparent.Australias northeast coast outer continental shelf waters are the ideal conditions of reproductive coral polyps.Coral reef building process is very slow,in the best condition,the thickening of the reef body every

8、 year but 3-4 cm.Some rock thickness has amounted to hundreds of meters,explain the architect here has gone through a long time.At the same time also shows that Australias northeast coast on the geologic history of subsidence process,has experienced the pursuit of sun and food coral growth up.The Gr

9、eat Barrier Reef formation Yu Zhongxin period,more than 25 million years of history.Its area is still expanding.It is after the last ice age,sea rose to the position after a years now.The Great Barrier Reef on earth is the most beautiful decorations,like a shining sky blue,indigo,blue and pure white

10、 light,even if to look on the moon is also clearly visible.The colorful coral In the group of the Great Barrier Reef,colorful coral reefs have red,pink,green,purple,yellow.Their shape differences,with antlers,ganoderma lucidum,lotus leaf,seaweed in the sea-floor spreading the beauty of the body.This

11、 distribution of more than 400 different types of coral reefs,including the worlds largest coral reef.雀鲷鱼雀鲷鱼蝴蝶鱼蝴蝶鱼天使鱼天使鱼.海葵海葵海蜇海蜇.Australias Great Barrier Reef is the nature of the created a miracle.However,our children may never see this miracle.Oceanographers Charlie Oolong according to a report released recently,the global climate warming will let the Great Barrier Reef in a short span of 20 years time the world heritage.WoLong once is Australia institute of oceanography,chief scientist.He said,we are powerless,the Great Barrier Reef will vanish in 20 years time.