Assessing the Namena Marine Reserve off Vanua Levu

BY: Sangeeta Mangubhai

Over the last two days we have been diving in the Namena Marine Reserve. There was much debate before we got here whether Nai’a Cruises should venture up to the reserve, as there were reports of large scale damage both to the land, coastal villages and adjacent coral reefs. The marine reserve in particularly, juts out like a finger from the main island of Vanua Levu and the eye of the storm passed over it.

Vibrant-coloured-soft-corals-in-the-Namena-Marine-Reserve

Vibrant-coloured-soft-corals-in-the-Namena-Marine-Reserve

Namena is special because it is the largest no-take marine reserve in Fiji, and Nai’a Cruises has been diving these reefs for decades, promoting its conservation alongside the Wildlife Conservation Society (WCS) and the Coral Alliance. Thousands of divers from all over the world have visited these iconic reefs. Countless photos are captured of the marine life in the reserve, and numerous inspirational articles appear in dive magazines about Namena’s rich and diverse fish, invertebrate and coral communities.

Namena is part of the Kubulau District where WCS has worked for more than a decade supporting local communities on natural resource management. The communities have a management plan that outlines how they manage their resources from the mountains all the way down to the reefs. The people of Kubulau have inspired other districts in Bua province to develop their own district ‘ridge to reef’ management plans.

 Sangeeta-Mangubhai-surveying-reefs-for-cyclone-damage-and-coral-bleaching

Sangeeta-Mangubhai-surveying-reefs-for-cyclone-damage-and-coral-bleaching

What was firstly evident on arriving at the Namena Marine Reserve was that Tropical Cyclone Winston had decimated Namena Island and the small eco-resort there. The island once lush with island forest, supporting a massive population of seabirds, was now barren, devoid of any green foliage. Trees were bent over, twisted and uprooted by the 185 mph winds. Only a handful of masked boobies (an iconic seabird) sat on bare tree branches, exposed and baking in the sun. We visited the island and spoke to some of the resort staff trying to clean up the island and salvage any remaining materials they could. Their families are thankfully all safe, but every building has been destroyed including their dive center and their jetty.

Under the water, the reefs in the marine reserve have done better than Namena Island. The cyclone has left a somewhat patchy trail of destruction. Some reefs we dived on were badly damaged with sea fans, soft corals and delicate branching corals the hardest hit. Some sea fans were ripped out by the roots, while others that were 2-3 meters across have been shredded in half. There were areas where large volumes of old and new rubble accumulated in between the reef structures and are shifting around with the currents (bad!), and other areas where the rubble was cleared away and swept to deeper waters (good!), leaving clear bare substrate ready for new coral recruits to colonise. Some areas the force of the waves had ripped off large massive corals and boulders.

 Healthy-reefs-in-Namena-Marine-rserve-that-were-untouched-by-cyclone-Winston

Healthy-reefs-in-Namena-Marine-rserve-that-were-untouched-by-cyclone-Winston

Despite the damage, there was a lot of evidence of the resilience of the Namena Marine Reserve that gave me hope. There were clear areas of reef that seemed largely untouched by the cyclone. Sites popular with tourists like the ‘Two Thumbs Up’ and ‘Kansas’ were for most part intact, and continued to flourish all the way from the base of pinnacles to just below the water surface. It is almost impossible to predict which reefs survived the cyclone, and which ones sustained serious damage. There is no clear pattern so far. We would dive on one reef to find it broken apart by waves, turn a corner and find a reef intact and flourishing. The fish and shark life seemed to be at this stage, largely unaffected. We were lucky to swim with white tip and grey reef sharks, large manta rays and big schools of big-eyed trevally, surgeonfish, and fusiliers. Well-protected marine reserves like Namena have both a great chance of recovery, and will play an important role reseeding adjacent ‘less protected’ or ‘less managed’ reefs. For the community of Kubulau, the the Namena Marine Reserve is not only a biodiversity asset they can share with divers that visit Fiji, but also an insurance policy to ensure they always have healthy fisheries.

 

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