Corals will die if we do not stop the pollution. --- Try your best to save them!
Reef historyThe word “reef” originated from German word “ref”. This word was introduced by mariners and signify underwater ridge or rock derivation organic as well as inorganic, being a danger to ships.
Today this term refers only to organic structures, originated from accumulation of reef-builders’ skeletons (today the main reef builders are corals – that’s why the most common reefs are coral reefs). Reefs have dense structure resistable to wave action. The highest biodiversity and the fastest growth of reefs are in coastal water zone on depth not bigger than 10 m. (for comparison: only by large ships, as big as, for example Titanic, draught could be as big as about 10m.)
Many organisms have been built reef-like structures since the begin of Paleozoic era (about 570 millions ago). There were Archaecyatha (they had been living only during the Cambrian period) and Algae. For comparison Homo sapiens has exist on Earth for 200 thousand years; Earth has 4,6 billion years.
During Carboniferous, Devonian, Silurian and Ordovician it were the following builders of reef-like structures:- Rugosa and Tabulata, Hydrozoa and Bryzoa. During Permian and Carboniferous these were: Rugosa, Tabulata, Algae, Spongiae and Bryzoa. Since Mesozoic the main reef-builders were Scleractinia and Rhodophyta (red seaweeds), Bryzoa and Hydrozoa.Source: http://library.thinkquest.org/
at 5:16 AM
COME AND COMMENT
Find out more about corals and marine life at these websites!
http://www.reefrelief.org
http://www.panda.org
http://www.uvi.edu
http://www.coral.org
http://www.iyor.org
http://www.coris.noaa.gov
http://healthyreefs.org
http://www.coralreef.gov
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