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.
Home Â» Our work Â» Saving the natural world Â» Oceans and marine Â» WWF's priority ocean places Â» The Great Barrier Reef Â» Threats to the Great Barrier Reef. There are growing threats to the Great Barrier Reef, with the most serious being climate change, catchment pollution, coastal development, and fishing.WWF is working hard to impress upon our governments the need for urgent action to address climate change globally.ome Â» Our work Â» Saving the natural world Â» Oceans and marine Â» WWF's priority ocean places Â» The Great Barrier Reef Â» Threats to the Great Barrier Reef. There are growing threats to the Great Barrier Reef, with the most serious being climate change, catchment pollution, coastal development, and fishing.