Philippines pioneers coral larvae cryobank to protect threatened reefs

Known because the “Amazon of the seas”, the Coral Triangle is a 5.7 million sq. km expanse throughout the tropical waters of Indonesia, Malaysia, Papua New Guinea, the Philippines, Solomon Islands, and Timor-Leste — and the richest marine ecosystem on the earth. The Triangle is dwelling to greater than three-quarters of the world’s coral species, a 3rd of all reef fish, the huge mangrove forests, and 6 of the seven marine turtle species. It additionally sustains the meals safety and livelihoods of greater than 120 million individuals.

The Coral Triangle can also be going through mounting risks. Growing carbon emissions, harmful fishing, air, water, and soil air pollution, and the accelerating results of local weather change are all driving coral bleaching, habitat loss, and species decline, inserting each biodiversity and coastal communities at grave danger.

Dangerously uncovered

According to the Status of Coral Reefs of the World 2020 report, the planet misplaced 14% of its corals between 2009 and 2018. Scientists have warned that with out drastic motion to hold world warming to 1.5º C, 70-90% of reside coral cowl might be misplaced by 2050. According to the UN Environment Programme, ocean temperatures might take a long time to stabilise even beneath probably the most bold local weather targets, leaving coral ecosystems dangerously uncovered within the interim.

In one type of resistance in opposition to these threats, the Philippines is getting ready to host Southeast Asia’s first coral larvae cryobank to assist restore and protect reefs. Set up by the University of the Philippines Marine Science Institute, the power will freeze and protect coral larvae — the small, free swimming “seeds” of corals — at very low temperatures. These larvae can later be used to revive broken reefs or for analysis, thus defending genetic range which may in any other case be misplaced.

The challenge is a part of a wider regional initiative that hyperlinks analysis establishments within the Philippines, Taiwan, Indonesia, Malaysia, and Thailand to create a community of cryobanks throughout the Coral Triangle.

Led by Chiahsin Lin of Taiwan’s National Museum of Marine Biology and Aquarium and the National Dong Hwa University, the cryobank is supported by the Coral Research & Development Accelerator Platform by way of the Marine Environment and Resources Foundation, Inc.

Delicate course of

Experts have stated the programme is a major step in constructing long-term resilience for one of many world’s most threatened marine ecosystems.

“The Philippines is showing other nations how to take a direct, proactive role in fighting the climate crisis and protecting their natural resources. It’s an act of hope and a vital investment in our oceans’ future,” stated Preeyanuch Thongpoo, who’s engaged on cryopreservation in Thailand on the Phuket Rajabhat University.

Dr. Lin is guiding the scientists from taking part international locations to set up the required services. At the guts of the trouble is the fragile course of that preserves coral larvae with out damaging their fragile cells.

A research revealed in Frontiers in 2023 described a method known as vitrification, the place the larvae are uncovered to particular protecting options earlier than being plunged into liquid nitrogen at –196º C. The fast freezing that ensues turns the larvae right into a glass-like state, stopping the formation of ice crystals that will in any other case destroy them.

To revive the samples, scientists use an equally swift methodology utilizing lasers, which thaw the larvae in a fraction of a second to keep away from re-crystallisation. Once warmed, the larvae are steadily rehydrated in seawater and checked for indicators of life, resembling swimming and settling, earlier than being transferred to tanks for additional progress.

This breakthrough methodology ensures genetic materials from corals will be safely saved for years and later used to assist restore broken reefs.

‘No endangered species’

Cryobanks of coral symbionts — microscopic algae residing inside corals — are essential to reef survival. One is being arrange at Phuket Rajabhat University beneath Dr. Thongpoo’s management. Her group is working with cauliflower corals (Pocillopora sp.), chosen for his or her abundance and talent to recolonise heat-damaged reefs.

“Unfortunately, due to technical challenges with our coral husbandry system, the corals did not survive in captivity, which has prevented us from collecting the larvae required for our experiments,” Dr. Thongpoo stated. “We are now working on refining our husbandry protocols and adapting our approach to ensure we can successfully collect and cryopreserve larvae in the near future.”

Cryopreserving many coral species is difficult: their larvae and reproductive cells are giant, lipid-rich, delicate to chilly, and sometimes comprise algae that block cryoprotectants.

Dr. Lin additionally pressured that preservation isn’t confined to endangered species. “For me, there’s no endangered species. All coral species are endangered,” he stated, warning that almost all may collapse by 2050. His group started with ‘model’ species resembling Pocillopora, which instantly releases larvae, and spawning corals like Acropora and Galaxsia.

“You need to set up the model coral species and then use those optimal freezing protocols on the endangered species,” he defined. This method, he added, differs from initiatives that prioritise solely probably the most threatened species.

‘Genetic insurance policy’

For now, the dimensions of reef loss is sobering. Dr. Lin warned that “in the near future, cryobanks may become museums for extinct coral species.”

For Dr. Thongpoo, then again, the trouble represents hope: “Cryopreservation is a genetic insurance policy for the future. We are essentially building a living seed bank of coral larvae and Symbiodiniaceae.”

Dr. Lin and Dr. Thongpoo additionally stated native communities that rely on the reefs for his or her livelihoods are sometimes unaware of their worth. In Southeast Asia, tourism, waste discharge, and harmful fishing have worsened reef decline. Without lively neighborhood participation, they warned, conservation efforts alone gained’t save corals.

With regional collaboration between scientists, governments, universities, and native communities, the challenge goals to strengthen resilience and safe the Coral Triangle’s reefs for generations to come.

Neelanjana Rai is a contract journalist who writes about indigenous neighborhood, setting, science and well being.

Published – October 06, 2025 05:30 am IST