Substrate Addition - Artificial reef — Bora Bora

OPP-59KFSMpermanent identifier · cite as oceanportfolio.org/p/OPP-59KFSM

Published as: Restauration d'une zone corallienne dégradée et implantation d'un jardin corallien à Bora Bora, Polynésie Française | Technique: Substrate Addition - Artificial reef | Disturbance addressed: Dredging | Genera: Acropora, Porites, Pavona, Montipora, Pocillopora, Fungia, Herpolitha, Cyphastrea, Psammocora | Method: Dredged pits were filled with 10,000m3 of sand, three 20m long groynes were built and the beach was replenished with sand. 125 artificial concrete structures, between 1.6 and 17t each, were deployed on the sandy shallow reef flat to act as breakwaters to protect the coastline. A 7,200 m2 “coral garden” was created by transplanting 311 coral colonies to 11 artificial structures and 200 large branching (Acropora spp.) and massive (Porites spp.) colonies to surrounding sand patches. Monitoring sur… | Survival of transplants reported by the source: 90.3636% | Post-restoration monitoring: 32 months | Authors' conclusion: The transplanted corals had a 95% survival rate, on average, except for high mortality of submassive Porites rus from smothering in sand. The coral gardens were further colonised by 53 coral colonies, sea urchins, tridacnid clams and a variety of reef fishes. | Lessons reported: Location effects need to be considered in the future, as the coral garden was affected by anchors and large amounts of sand. | This record was compiled from a published source and has not been confirmed by the organisation that carried out the work. No contribution to the condition index is recorded: the source reports survival of transplanted material, which is not a measure of ecosystem condition.

Recorded result

A variable shows "pending" instead of a contribution when no domain area has been set for it yet — the share of the world a project touched cannot be computed without one. The health percentages are accurate regardless.