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Home / Science / Australia's Great Barrier Reef begins annual spawning of mass corals, Australia / NZ News & Top Stories

Australia's Great Barrier Reef begins annual spawning of mass corals, Australia / NZ News & Top Stories



SYDNEY (AFP) – A mass spawning of coral has begun on the Australian Great Barrier Reef. Early signs indicate that the annual event could be one of the largest in recent years, local marine biologists said Sunday (November 17).

Buffeted Rising sea temperatures and fading coral caused by climate change cause the largest reef system in the world to be in turmoil once a year. It releases coral eggs and sperm, which are synchronized to increase the chances of fertilization.

Marine biologist Pablo Cogollos According to Cairns-based tour operator Sunlover Reef Cruises, the first night of spawning in 201

9 was particularly "productive," a positive sign of the threatened ecosystem.

"There were three times the volume of eggs and sperm compared to last year, when the soft corals appeared four nights after the full moon and it was considered the best coral brood in five years," he said.

The natural wonder compared to an underwater fireworks or underwater fireworks snow orm, occurs only once a year under certain conditions: after a full moon, when the water temperatures are between 27 and 28 ° C.

Soft corals release first, followed by hard corals, in a process that typically spans 48 and 72 hours.

Corals along large areas of the 2,300 km long reef were killed by the rising sea temperatures caused by climate change and left behind bone remnants in a process known as coral bleaching.

The northern reaches of the reef suffered from this In 2016 and 2017, unprecedented heavy discoloration occurred for two consecutive years, which could lead to irreparable damage.

Last year, scientists launched a project to harvest coral eggs and sperm during the spawning process from which they grow coral larvae and use it to regenerate severely damaged areas of the reef.


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