Attempt to collect fish on dead coral reefs by flowing 'living coral reef sounds' with underwater speakers
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Coral reefs are dying all over the world due to rising seawater temperatures, and some experts point out that the speed of coral reefs has accelerated and that recovery by nature can no longer catch up . Various attempts have been made to preserve coral reefs that are threatened to disappear, but researchers are now trying to solve the problem by playing 'living coral sounds' through underwater speakers.
Acoustic enrichment can enhance fish community development on degraded coral reef habitat | Nature Communications
https://www.nature.com/articles/s41467-019-13186-2
Featured news-Sounds of the past give new hope for coral reef restoration-University of Exeter
https://www.exeter.ac.uk/news/featurednews/title_768084_en.html
Scientists use loudspeakers to make dead coral reefs sound healthy | Boston.com
https://www.boston.com/news/science/2019/12/01/scientists-use-loudspeakers-to-make-dead-coral-reefs-sound-healthy-and-fish-flock-to-them
So far, researchers trying to restore coral reefs have been trying to breed coral reefs that are resistant to global warming, but the new approach is unique and unique. thing. Researchers conducted an experiment to bring back various fish around the coral reef by playing 'recorded sound from live coral' around the dying coral reef. When the experiment was conducted over 6 weeks, it was said that there were twice as many fish around the coral reef that died the sound of live coral compared to the coral reef that died without sound . The gathered fish were a variety of species including scavengers , herbivorous and carnivorous, and there was a tendency to stay on the coral reef with sound.
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Steve Simpson, a professor of marine biology at the University of Exeter who led the research, said, “A healthy coral reef is surprisingly noisy, with shrimp moving sounds and fish roaring. A young fish looking for a calming place. Will stay in a place with such noise. '
In 2016, a survey conducted by an Australian government agency revealed that 'the majority of the Great Barrier Reef coral reefs are at risk of death .' In response, researchers at Exeter University set up 33 experimental areas in the Great Barrier Reef from October to December 2017. Underwater speakers were placed at the center of each area, and it was confirmed that the sound echoed evenly in all directions centered on the speakers. This area was divided into “locations where live coral reef sounds are reproduced”, “locations where dummy speakers are installed” and “locations where nothing is installed”.
The photo below shows Tim Gordon of Exeter University trying to install underwater speakers.
The actually installed speaker looks like this.
Researchers believe that by doing this on a large scale, coral reefs that have died or are dying around the world can be revived.
Researchers admit that when coral reefs are recalled with speakers, the coral reef damage itself does not recover. But Gordon said, “Fish is important for coral reefs in order for a healthy ecosystem to function. Boosting the number of fish in this way neutralizes the coral reef damage found around the world, It ’s a good kickstart for the recovery process. ”
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