Scientists used loudspeakers to make dead coral reefs sound healthy. Fish flocked to them - The Washington Post

"Healthy coral reefs are remarkably noisy places — the crackle of snapping shrimp and the whoops and grunts of fish combine to form a dazzling biological soundscape," said Steve Simpson, a marine biology professor at the University of Exeter.....
https://www.washingtonpost.com/climate-environment/2019/12/01/scientists-used-loudspeakers-make-dead-coral-reefs-sound-healthy-fish-flocked-them/

Study: 'Urgent' Action Against Global Warming Needed To Save Coral Reefs

In 2016, a mass bleaching event caused unprecedented destruction to the Great Barrier Reef and other coral reefs around the world. Now, a new study in Nature has concluded that securing a future for coral reefs "ultimately requires urgent and rapid action to reduce global warming."...
http://www.npr.org/sections/thetwo-way/2017/03/16/520450521/study-urgent-action-against-global-warming-needed-to-save-coral-reefs?ft=nprml&f=1001

Acidic Seawater Dissolving Florida Keys Reefs Key 'Indicator' Of Global Warming

Seawater — increasingly acidic due to global warming — is eating away the limestone framework for coral reef in the upper Florida Keys, according to a new study. It's something that scientists had expected, but not so soon.

This is one of the first times scientists have documented long-term effects of ocean acidification on the foundation of the reefs, said study author Chris Langdon, a biological oceanographer at the University of Miami....
http://talkingpointsmemo.com/news/acidic-seawater-dissolving-reefs-florida-keys

Coral reefs are dying – just when we need them most

Coral reefs around the world are rapidly dying – just when humans need their protective services the most.

The plight of the world's reefs has become all too clear this month with news from the Australia that the 30 to 50 percent of the Great Barrier Reef is already dead, and the realization that a newly discovered reef in the Amazon River is already under threat....
http://www.csmonitor.com/Environment/2016/0427/Coral-reefs-are-dying-just-when-we-need-them-most

El Niño Has Peaked, And A Coral Ecosystem Is Utterly Devastated

As global ocean temperatures begin to recover from the record-breaking El Niño, the tremendous impact on the world’s coral reefs is still being calculated.

Coral reefs are more important than many people realize: Taking up just 0.2 percent of the ocean, they support about a quarter of all marine species, and provide support to livelihoods of 500 million people. But beyond that, a healthy reef is stunningly beautiful. They’re part of what makes life on Earth so special....
http://thinkprogress.org/climate/2016/04/12/3768723/coral-bleaching-christmas-atoll/