Outbreaks of crown-of-thorns starfish, which eat coral, have been linked to poor water quality.
Starfish image from www.shutterstock.com
To fix pollution on the Great Barrier Reef, some farming practices will have to change.
A bleached Seriatopora coral.
Right on cue, coral bleaching has struck the Great Barrier Reef, as the world's third mass bleaching event continues.
Corals grow better in the more alkaline ocean conditions that existed in pre-industrial times.
By artificially going 'back in time' to more alkaline ocean conditions, researchers have shown the damage that ocean acidification is already doing to the Great Barrier Reef.
The Great Barrier Reef is made up of thousands of individual reefs.
NASA Goddard Space Flight Center/Flickr
Ocean acidification will hurt some parts of the Great Barrier Reef more than others.
Adult corals need a good developmental start to establish themselves on the reef.
Anders Poulsen/Wikimedia Commons
Without action to curb the rising acidity of our seas, corals will start to develop deformed skeletons at a crucial young stage of their lives.
Productivity hotspots in an otherwise nutrient-poor ocean. High abundances of plankton-eating fish on an Indo-Pacific coral reef.
Scientists say they've answered a long-held question of Darwin's on why islands are so productive – an important step toward planning protections against the effects of climate change.
Clearing mulga woodland in Queensland to open up land for cattle during drought.
We're going to have to adapt to climate change, but some of the options on the table could do more harm than good if they destroy the ecosystems that protect us.
The land may be dry, but Western Australia’s waters are full of life.
The Great Barrier Reef might get all the attention, but what about our western coral reefs? Warmer waters and human impacts mean these reefs are in trouble.
Scuba diving must be done in a sustainable manner to preserve the industry.
Africa has a number of excellent scuba diving sites, but these must be maintained sustainably to keep attracting different divers.
The third global bleaching event is currently underway but new research has revealed mechanisms that boost coral resistance to heat stress. Copyright: XL Catlin Seaview Survey.
Corals are under threat from warming seas, and new research shows that even the toughest corals will suffer.
Early signs of bleaching coral in Kaheohe Bay Hawaii, August 2015.
XL Catlin Seaview Survey / Underwater Earth
Many corals can't make it through the bleaching events caused by warming ocean waters. But some can – and scientists are trying to learn more about the sources of their resilience.
Nutrient runoff is one of the major contributors to crown-of-thorns outbreaks.
Crown-of-thorns image from www.shutterstock.com
Despite 15 years of concerted action by the Australian and Queensland governments the health of the reef is not improving and in fact may be continuing to deteriorate.
Soon the oceans will be too warm to support thriving coral reefs.
USFWS - Pacific Region/Flickr
Corals are experiencing only the third global bleaching event in recorded history, caused by warming seas. But worse is yet to come.
The reefs of Indonesia - part of the Coral Triangle - could lose many of their species thanks to climate change.
How will climate change affect life in the oceans? New research shows that the answer is likely good and bad.
Diving in Indonesia’s Raja Ampat Marine Park to see these clownfish will cost you more than before – but for good reason.
Diving in many parts of Indonesia, Thailand and Malaysia now costs a little more than it used to – but you might be happy to discover why.
The Great Barrier Reef is one of the most magnificent wonders of our world.
With the United Nations set to decide on whether to list the Great Barrier Reef as officially in danger, we look at the various threats to the reef's survival, starting with the biggie... climate change.
Give up, brain coral, we have you surrounded.
Joseph Pawlik, UNCW
With their natural predators removed, sponges are free to take over coral reefs.
Coral reefs and associated fisheries are of vital social, cultural and economic importance.
Scuba-diving scientists devise method for gauging the health of coral reefs – a vital ecosystem for keeping fisheries sustainable for people.
Climate change is affecting gender ratios in fish, and could hamper their ability to return to a 50:50 balance.
Warmer temperatures can throw off the gender balance in some species. But some fish can adjust their offspring's gender to compensate, but only if temperatures don't rise too high.
The World Heritage Committee has called for a comprehensive assessment not just of the threats to the Great Barrier Reef, but of their cumulative effect.
AAP Image/Australian Institute for Marine Science, Ray Berkelmans
The government says it has met all of the recommendations for safeguarding the Great Barrier Reef. But a close reading of the dozens of UN recommendations shows that many have been only partly fulfilled.