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.
Australia's Great Barrier Reef is rapidly losing its coral, to the point that UNESCO may soon place the natural wonder on its in danger list. Climate change is one culprit, but so is the country's booming extraction industry.Environmentalists warn that time is running out for the reef.ustralian scientists have calculated that the Great Barrier Reef, the earth's largest living organism, has lost half of its coral in the last 27 years, and coral death is only accelerating. One reason is that Australia feels the effects of climate change earlier and more strongly than elsewhere.