In recent snorkeling trips off the coast of Mauritius, Nadeem Nazurally has witnessed a troubling sight. The once vibrant coral reefs now appear faded and lifeless beneath the waters, signaling a significant issue. Nazurally, an associate professor at the University of Mauritius, expressed concern over the loss of colors and marine life essential for the island’s ecosystem and economy.
Mauritius, known for its rich coral diversity with nearly 250 coral species and extensive reef systems, has experienced a drastic decline. The island nation off Africa’s southeast coast has faced challenges, including a substantial loss of coral cover since the 1970s, multiple bleaching events, and a devastating oil spill in 2020. Climate change-driven rising ocean temperatures in the western Indian Ocean have led to unprecedented mass coral bleaching events. The Intergovernmental Panel on Climate Change (IPCC) warns that coral reefs worldwide could disappear if global warming surpasses 2 degrees Celsius above pre-industrial levels.
Despite these challenges, restoration initiatives are showing promise. With a $10 million US grant from the Adaptation Fund, the Mauritian government, in collaboration with scientists and NGOs, launched a project in 2019 to restore degraded reef areas by employing both sexual and asexual reproduction methods.
Meera Koonjul, the director of fisheries in Mauritius, explained the two restoration approaches: sexual reproduction, involving coral spawning to create new colonies, and asexual reproduction, which produces genetic clones through methods like fragmentation. The project established around 100 coral nurseries where fragments were grown and transplanted into the seabed at the Blue Bay Marine Park, a protected marine area.
By combining these methods, over 100,000 coral fragments have been successfully planted in the area, contributing to reef restoration efforts. Similar approaches have been adopted by Nazurally through his non-profit organization, EcoMode Society, utilizing metal frames to support coral fragments for growth and restoration.
Marie Annielle Espiegle, a restoration technician with SECORE International, highlighted the importance of integrating sexual and asexual methods for efficient reef recovery. While asexual methods can yield quicker results, sexual reproduction introduces genetic diversity, enhancing coral resilience against threats like diseases.
As the restoration deadline approaches, Mauritius has restored over 50% of its target area, with plans for further expansion and extension to ensure successful reef restoration. Beyond ecological preservation, these efforts are crucial for safeguarding Mauritius’ cultural identity tied to its coral reefs, emphasizing the significance of ongoing conservation endeavors.
