The Reef and Rainforest Research Centre (RRRC), a non-profit enterprising Australian organization, has reported substantial signs of recovery for corals affected by mass coral bleaching on the Great Barrier Reef. A milder 2017-18 summer as well as cooperation between science, industry and government is supporting the recovery of the Reef in many important locations.
Bleaching of coral is like sunburn to human skin. There are different levels of bleaching damage.
The Reef and Rainforest Research Centre (RRRC) in cooperation with the Association of Marine Park Tourism Operators (AMPTO) conducted detailed surveys of bleaching levels at key dive tourism sites around Cairns in 2016. While many of the primary dive sites were not affected in the 2016 bleaching, quite a few were quite strongly affected in the 2017 event. Fortunately, these are the same reefs showing strong signs of recovery.
“It is important to realize that bleaching occurs in multiple stages, ranging from the equivalent of a mild sunburn to coral mortality – so when a reef is reported as ‘bleached’ in the media, that often leaves out a critical detail on how severe that bleaching is, at what depth the bleaching has occurred and if it’s going to cause permanent damage to the coral at that site,” RRRC Managing Director Sheriden Morris said.
In April, the Australian federal government announced a $379 million grant to help the Great Barrier Reef tackle such challenges as climate change, coral-eating starfish and agricultural runoff that ruins the water quality.
The majestic Great Barrier Reef is one of the seven natural wonders of the world and the world’s largest living organism, stretching 1,430 miles and featuring an abundance of marine life with over 3,000 individual reef systems and coral cays as well as hundreds of tropical islands with some of the world’s most beautiful sun-soaked, golden beaches.
As an iconic natural wonder and an unforgettable lifetime experience, the Great Barrier Reef is one of the world’s most sought-after tourism destinations, offering an abundance of experiences for travelers such as snorkeling, scuba diving, aerial tours and marine educational tours. Tourism provides critical support of the Great Barrier Reef, as visitor fees contribute to the Great Barrier Reef Marine Park Authority, the federal agency with oversight for the protection and scientific research to support the sustainability of the reef, including regulations that provide a global benchmark for responsible tourism practice.
Reefs around the world experienced bleaching in 2016 and 2017, and while the northern part of the Great Barrier Reef did experience some severe bleaching, this condition did not affect the entire Reef and there are currently encouraging signs of recovery at a variety of key tourism sites. Recent photos taken in June and July 2018 show healthy, vibrant coral at numerous locations that suffered during the back-to back coral bleaching events in 2016 and 2017 including Fitzroy Island, Moore Reef and Saxon Reef near Cairns, among other locations.
Coral bleaching occurs when corals experience too much stress – i.e. from high water temperatures or poor water quality – and eject their symbiotic zooxanthellae, losing their distinctive colors. If stressful conditions persist, the corals will die, but if conditions return to acceptable levels, some corals can re-absorb zooxanthellae and recover. A relatively cooler 2017-2018 summer in the northern Great Barrier Reef has helped many corals affected by the mass bleaching to start the journey back to good health.
The Reef Restoration Foundation, a nonprofit social enterprise creating optimism for the Great Barrier Reef through innovative coral reef restoration techniques, established the first ocean-based coral nursery in the Great Barrier Reef in December 2017 to regenerate damaged coral reefs at Fitzroy Island, Cairns, and have plans to install a series of other nurseries throughout the Great Barrier Reef. They are pleased to report that the first crop of corals have exceeded expectations, increasing in size 2.5 times in six months with nine out of 10 corals thriving and 222 new coral fragments resulting from the initial 24 pieces of coral initially harvested. They will soon attach about 100 of these thriving corals onto damaged coral reefs at Fitzroy Island.
Tourism operators have also reported improvements in the condition of corals at their high-profile dive sites. Quicksilver Group Environmental Compliance Manager Doug Baird said there had been widespread recovery from the 2016 and 2017 mass bleaching events at the company’s regular sites.
“All of our sites that survived the mass bleaching events have shown strong signs of recovery, they look great now. We were fortunate that the effects of bleaching were very patchy,” Doug said. “I was in the water a few weeks ago at our pontoon site at Agincourt Reef and it looks stunning, there’s staghorn coral that’s budding out and regrowing.”