Coral Reef: Significant submarine feature formed because of accumulation of skeletons of coral polyps (lime secreting organism). Coral polyps thrive in tropical ocean (20o N- 25oS latitude) kin on lime. Coral reefs are formed due to formation of one shell upon another shell along submarine platforms at suitable depth.
Conditions for the growth of coral polyps:
Types of coral reefs:
Fringing reef: developed along the continental margins or along islands. Steep and vertical seaward slope of landward is gentle. Upper surface is corrugated and uneven. Fringing reefs are generally attached to the coastal land but sometimes there is gap between them and land and thus lagoon is formed between them. Wherever the river drain the continuity of coral reefs are broken.
Barrier reef: largest coral reefs off the coastal platforms but parallel to them are called barrier reefs. Barrier reefs are largest, highest and most extensive. They are rarely found continuous but mostly they are broken at many places and thus the lagoon have contact with the open sea and oceans through (xyz).
Great Barrier Reef, located parallel to the west of Australia, is the largest of all barrier reefs of the world.
A ring of narrow growing corals of horseshoe shape and crowned with palm treesis called atoll. Generally found around are island or in elliptical form on a submarine platform. Lagoon is there in the middle of coral ring. Atolls are divided into three types: true atoll, island atoll and coral island or atoll island
Coral bleaching: Loss of algae from the corals resulting into the white colour which is indicative of death corals. Global worming has been reported as the major factor of coral bleaching.
Cause of large scale coral bleaching have been reported in the Andaman and Nicober island of India. The have mainly colonized around the Lakhwadeep and the Andaman and Nicober islands. Small patches of coral reefs are found in the Gulf of Kutch and the gulf of manner.
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Sir I've lost my admit card and I also forget my roll no
Please help me in other ways
Dear Sir,
After login when i click on attempt button to take test a error msg show "Test series ended", plesae resolve this issue.
sir, my name is SWARUP ANAND, my DOB- 01/03/1984, my father’s name- SANTOSH KUMAR SRIVASTWA. I have loss my admit card. Please tell my roll number.
BPSC mains 56th-59th me Roll No. 119040 pass hai aur PT me fail. Mahabhrstachar hai. pls see it must
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