Substrate Stabilisation — Sabah

OPP-ZVFMPZpermanent identifier · cite as oceanportfolio.org/p/OPP-ZVFMPZ

Published as: Step Reefs, rubble nets | Technique: Substrate Stabilisation | Disturbance addressed: yes | Method: We stabilise our slope to prevent our regeneration work slipping away. We are stabilising the rubble with soft coral nets, which slows the rubble movement and which the turtles do not destroy. We then plant soft corals and sponges on the nets to hold the rubble together. We also build rubble cages at the top of the slope, which are wire baskets attached to the ground. We fill these with coral rubble and like the nets, plants sponges and corals over the basket to help hold the rubble to the seaf… | Authors' conclusion: Pom Pom Island has a steep slope from the reef crest to the deep water drop off at a depth of around 50 m. All this slope has been seriously blasted in the past by bomb fishermen. All that is left of the original reef are the rubble fragments on a seriously sloping reef. The structures we build are difficult to stabilise. | Lessons reported: Aimed to create small reefs on the steep slopes. These look great initially but too many of them are unstable and deteriorate rapidly. While the corals grow and the fish live on the step reefs we create, unfortunately the slope continues to erode and a beautiful series of steps fixed solidly to the seabed becomes a tumbled mess after turtles scratch and fish dig. | 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.

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