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Photo Credit: DAR Hawaiʻi Coral
Restoration Nursery
Methodology
Our approach to coral restoration is rooted in innovative science and a deep respect for Kauaʻi’s marine environment.
Restoration via Microfragmentation
Our project aims to mimic successful microfragmentation and out-plantation techniques done at the Hawai‘i Division of Aquatic Resources Coral Restoration Nursery on Oʻahu.
Coral Collection
Coral Quarantine
Photo Credit: DAR Hawaiʻi Coral
Restoration Nursery
Coral Microfragmentation
Photo Credit: DAR Hawaiʻi Coral
Restoration Nursery
Coral Grow Out
Photo Credit: DAR Hawaiʻi Coral
Restoration Nursery
Coral Acclimation
Photo Credit: DAR Hawaiʻi Coral
Restoration Nursery
Coral Outplanting & Monitoring
Photo Credit: DAR Hawaiʻi Coral
Restoration Nursery
Photo Credit: DAR Hawaiʻi Coral
Restoration Nursery
Detailed Methodology
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Coral Collection
When collecting “corals of opportunity” (COO), our team targets corals growing on man-made structures like moorings, marine debris, and old dock pilings. These corals, though thriving in less valuable habitats, are carefully collected over broad areas to avoid concentrated damage. We use tools like clippers and hammers with care to minimize harm to the coral tissue. Our aim is to harness these resilient corals to support reef restoration efforts.
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Coral Quarantine
Immediately after collection, corals are placed in designated quarantine tanks where they are closely monitored for health concerns. We assess corals daily for disease, invasive species (AIS), micropredators, and other indicators of poor health. Corals are quarantined for at least 30 days without health issues before being moved out of quarantine. Any observed health issues restart the quarantine period to ensure they are free of potential threats.
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Coral Grow Out
Microfragments are placed in specialized grow-out tanks where environmental conditions such as water temperature, flow, salinity, light, and coral food are carefully controlled. The grow-out tanks provide optimal conditions for rapid coral growth. The process is meticulously documented to track the development of each coral module, ensuring a chain-of-custody and healthy growth.
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Coral Outplanting
During outplanting, corals are secured to the reef using marine-grade epoxy. Outplanting is typically performed during cooler months to prevent heat stress and potential bleaching from warm summer temperatures. A baseline assessment of the outplant site is conducted to determine its suitability for coral restoration. The process is documented to maintain a chain-of-custody for each coral.
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Coral Transport
Corals are transported with the utmost care to protect them from high UV exposure, temperature fluctuations, and direct air contact. They are kept in temperature-stable, clean, and shaded seawater during transport. We use flexible baskets or rigid platforms, supported by lift bags or buoys, to ensure safe movement across the reef.
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Coral Microfragmenting
To accelerate coral growth, we use microfragmentation, which involves cutting coral colonies into small pieces to increase the surface area for new tissue growth. We use a diamond blade band saw to create microfragments, which are then attached to concrete modules with coral-safe superglue. This method enhances the growth rate by maximizing the surface area available for new coral tissue.
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Coral Acclimation
Before outplanting, corals are acclimated to natural reef conditions in outdoor tanks for at least 30 days. This acclimation process helps corals adjust to natural sunlight, photoperiod, water quality, and temperatures. It prepares them for a smooth transition from the controlled nursery environment to the natural reef.
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Coral Monitoring
Post-outplanting, corals are monitored regularly to assess their health, survival, and growth. Early monitoring occurs frequently, gradually decreasing as the coral becomes established. Key indicators include size and growth, tissue health, disease presence, invasive species, and impacts from sedimentation or competitors. This ongoing monitoring ensures the success of the restoration efforts.
Get in Touch
Join us in our mission to restore Kauaʻi’s coral reefs. Whether you’re a passionate ocean advocate, a local business, or someone eager to learn more, we’d love to hear from you. Get in touch and discover how you can be part of this vital work.
@kauaicoralrestoration