It is either a Ï bond or a lone pair on an atom of relatively high electron density in a molecule or ion, or a bond that must break during a reaction. An electron sink is an atom on a molecule or ion that can accept a new bond or lone pair of electrons.
Threats to the Reef. The Great Barrier Reef is one of the worldâs best managed reefs but, like other coral reefs, it faces threats such as: 1  Climate change. 2  Extreme weather.3  Declining water quality. 4  Coastal development. 5  Illegal fishing. 6  Crown-of-thorns starfish outbreaks. 7  Marine Debris.hreats to the Reef. The Great Barrier Reef is one of the worldâs best managed reefs but, like other coral reefs, it faces threats such as: 1  Climate change. 2  Extreme weather. 3  Declining water quality. 4  Coastal development. 5  Illegal fishing. 6  Crown-of-thorns starfish outbreaks.
The Great Barrier Reef Marine Park is a marine protected area which includes almost all of the Great Barrier Reef. It encompasses an area of about 345,400 square kilometres, commencing at the tip of Cape York and extending along the Queensland coast to just north of Bundaberg.he Great Barrier Reef off Queenslandâs east coast is an international tourism icon. It is made up of about 2,900 unconnected coral reefs, stretching over 2,000 km from south of Papua New Guinea to Bundaberg. There are also about 900 islands within the Great Barrier Reef.