Related Topics

South China Sea
2023 OCT   23
Vizhinjam Port
2023 OCT   18
Gulf of Guinea
2023 OCT   17
Baltic Sea
2023 OCT   16
Gaza Strip
2023 OCT   14

Great Barrier Reef

2022 FEB 1

Preliminary   > Geography   >   Places in news   >   Places in news

Why in news?

  • The Australian government recently pledged 1 billion Australian dollars to protect the Great Barrier Reef, months after it narrowly avoided being placed on the UN's cultural agency's "danger" list due to the threat of climate change.
  • Since 2015, global heating has fuelled three mass bleaching events that weakened and killed corals across the entire span of the reef.

About Great Barrier Reef:

  • The Great Barrier Reef is a site of remarkable variety and beauty on the north-east coast of Australia (Coral Sea).
  • It contains the world’s largest collection of coral reefs, with 400 types of coral, 1,500 species of fish and 4,000 types of mollusc.
  • It is the world's biggest single structure made by living organisms.
    • This reef structure is composed of and built by billions of tiny organisms, known as coral polyps. It supports a wide diversity of life and was selected as a World Heritage Site.
  • It also holds great scientific interest as the habitat of species such as the dugong (‘sea cow’) and the large green turtle, which are threatened with extinction.

What is Coral Bleaching?

  • Coral reefs originate from a symbiotic relationship between the coral polyps and algae that live in the polyps. Coral bleaching occurs when the coral polyps expel these algae.
  • They occur due to factors such as variations in water temperature, acidity & salinity, extreme low tides, sea level rise, excessive sedimentation, zoonotic diseases, cyanide fishing and pollution.
  • When coral bleach occurs, it is not dead. Corals can survive a bleaching event. But as they come under more stress, they are subject to mortality.


Great Barrier Reef is located in which of the following sea?

(a) Bering Sea
(b) Coral Sea

(c) Tasman Sea

(d) Yellow Sea