Upload
sheetal-wagh
View
157
Download
0
Embed Size (px)
Citation preview
WHAT ARE CORAL REEFS? • Coral reefs are underwater
structures made from calcium carbonate secreted by corals.
• They are colonies of Any living animals found in marine waters that contain a few nutrients.
• The bulk of coral reefs is made up of coral skeletons from mostly intact coral colonies
December 3, 15 Coral reef 2
• Most coral reefs are built from stony corals, which in turn consists of polyps that cluster in groups.
• The polyps are like Any sea anemone.
• Coral reefs occupy less than 0.1% of the world’s ocean surface.
December 3, 15 Coral reef 3
FRINGING REEF
• a reef system that grows fairly close to (or directly from) the shore, with an enArely shallow lagoon or none at all
December 3, 15 Coral reef 9
BARRIER REEF
• A reef system parallel to shore and is separated from it by a wide lagoon that contains atleast some deep porAons.
December 3, 15 Coral reef 10
December 3, 15 Coral reef 11
The Great Barrier Reef is the world's largest coral reef system It is composed of over 2,900 individual reefs and 900 islands stretching for over 2,600 kilometres (1,600 mi) over an area of approximately 344,400 square kilometres (133,000 sq. mi) The reef is located in the Coral Sea, off the coast of Queensland, Australia A scuba diver looking at a giant clam on the Great Barrier Reef
SIGNIFICANCE OF CORAL REEF
MEDICINAL VALUE
PROTECTIVE IN FUNCTION
TOURISM
JOB OPPORTUNITIES
AS CURE FOR SEVERAL DISEASES December 3, 15 Coral reef 12
THREATS Coral reefs are dying:-‐ Reasons-‐ • coral mining • agricultural and urban runoff • polluLon • disease • sea temperature rise • pH changes from ocean acidificaLon • greenhouse gas emissions December 3, 15 Coral reef 13
December 3, 15 Coral reef 14
ProtecLon
• Marine protected areas (MPAs) have become increasingly prominent for reef management
• MPAs promote responsible fishery management and habitat protecLon. Much like naLonal parks and wildlife refuges, MPAs restrict potenLally damaging acLviLes
• MPAs encompass both social and biological objecLves, including reef restoraLon, aestheLcs, biodiversity, and economic benefits