Why does the phenomenon of dead and bleached coral occur in Con Dao?

At the present time, the bottom water temperature of Con Dao waters is 32 degrees Celsius; If the sea water temperature at coral reefs does not decrease, the coral's ability to recover is very low.

On May 30, information from the Management Board of Con Dao National Park said that through a field survey of coastal waters of islands under the management area of ​​Con Dao National Park, the Department of Conservation and International Cooperation -Con Dao National Park Management Board said the area of ​​dead and bleached coral is quite large on the islands.

Some bleached coral species can recover significantly and potentially recover if ocean temperatures decrease. If bleaching is severe and prolonged, large numbers of corals can be wiped out. (Photo: Con Dao National Park Management Board/VNA broadcast).

The Department of Conservation and International Cooperation - Con Dao National Park Management Board organized a field survey of coral reefs in the sea: Con Son Bay, Hon Bay Canh, Hon Cau, Dam Tre Bay, Hon Tre Nho, Hon Tre Bamboo Lon, Ong Dung, Hon Ba, Hon Tai and Hon Egg.

During the survey of coral reefs, the Department of Conservation and International Cooperation initially recorded the amount of coral bleaching and dying at a fairly large rate because the El Nino phenomenon caused the bottom seawater to warm up in April. , May.

The phenomenon of coral death and bleaching has occurred a lot in Con Dao , the heaviest in the years 1998, 2010, 2016 due to the El Nino phenomenon (anomalous sea water warming in the central and eastern equatorial regions). Pacific Ocean, causing weather around the globe to be affected as well).

After that, the Con Dao National Park Management Board surveyed and implemented coral restoration work on the islands.

According to Mr. Le Hong Son, Head of Conservation and International Cooperation Department - Con Dao National Park Management Board, more surveys need to be conducted to assess the scale and extent of dead and bleached coral this time. .

The ideal living temperature for coral ranges from 24-30 degrees Celsius. At present, the bottom water temperature of Con Dao waters is 32 degrees Celsius, if the sea water temperature at coral reefs does not decrease. The ability of coral to recover is very low and the area of ​​dead coral will be very large.

The Management Board of Con Dao National Park has connected with the Nha Trang Institute of Oceanography, proposing that the Institute coordinate with Con Dao National Park to specifically survey and evaluate the rate of dead and bleached coral on the islands.

Corals are populations of invertebrate marine organisms. Coral bleaching is triggered by unusual water temperatures that cause corals to expel colorful algae that live in their tissues. Then the vibrant colors of the coral disappear. Without the help of algae in providing nutrients, coral cannot survive.

Some bleached coral species can recover significantly and potentially recover if ocean temperatures decrease. If bleaching is severe and prolonged, large numbers of corals can be wiped out./.