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Context‐dependent benefits of coral reef restoration.

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Title: Context‐dependent benefits of coral reef restoration.
Authors: Adam, Arne A. S.1 (AUTHOR) a.adam@uq.edu.au, Bozec, Yves‐Marie1 (AUTHOR), Hedley, John D.2 (AUTHOR), Mumby, Peter J.1 (AUTHOR)
Source: Restoration Ecology. Mar2026, Vol. 34 Issue 3, p1-15. 15p.
Subjects: Coral reef restoration, Larval dispersal, Climate change, Coral reefs & islands, Ecological models, Restoration ecology, Species diversity, Ecological disturbances
Geographic Terms: Great Barrier Reef Marine Park (Qld.)
Abstract: Introduction: Climate change creates dire prospects for coral reefs over the coming decades, prompting interest in whether restoration strategies could mitigate some of the projected decline. Restoration benefits are context dependent, being influenced by reef state (ecological, connectivity and demographic conditions, etc.), intervention design (e.g. size of restored area and number of corals), and the impact of disturbance occurring post‐coral deployment. Objectives: Here, we use an individual‐based ecological model to quantify the importance of context in driving restoration benefit. Methods: Specifically, we focus on the intervention of out‐planting corals on a single reef, parameterized to conditions found on the Great Barrier Reef. Results: Our results show that out‐plant density and size of the restoration area contribute to restoration success, particularly when disturbance pressure on the reef is limited. Specifically for the ecological context, we find that larval supply is an important driver of restoration success, with benefits predominantly increasing when larval supply is low and self‐retention is high. Thereby, restoring reefs where larval supply is low showed a four‐fold increase in benefits compared to doubling the restoration effort. Species composition is important with greater benefits predicted when the restored reef is not comprised of Acroporidae pre‐restoration. Benefits are also sensitive to the timing of disturbances, with post‐disturbance benefits increasing nonlinearly at reefs with low larval supply and retention until 10–12 years post‐restoration after which benefits are retained. Conclusions: Our results highlight the importance of context when designing and evaluating reef restoration as well as setting credible expectations of success. Implications for Practice: The context of a restoration impacts restoration success of coral reef interventions. When designing coral intervention strategies, prioritizing reefs with low larval supply and high retention could result in higher post‐restoration benefits in the absence of disturbances, compared to strategies that double the restoration effort. Higher restoration success can be achieved when restoring reefs that consist of a non‐Acroporidae composition pre‐restoration. Out‐planting thermally enhanced corals could double restoration benefits. Benefits can persist even after major disturbances, with benefits increasing the later a bleaching event occurs post‐restoration, specifically for reefs with low connectivity. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
Abstract:Introduction: Climate change creates dire prospects for coral reefs over the coming decades, prompting interest in whether restoration strategies could mitigate some of the projected decline. Restoration benefits are context dependent, being influenced by reef state (ecological, connectivity and demographic conditions, etc.), intervention design (e.g. size of restored area and number of corals), and the impact of disturbance occurring post‐coral deployment. Objectives: Here, we use an individual‐based ecological model to quantify the importance of context in driving restoration benefit. Methods: Specifically, we focus on the intervention of out‐planting corals on a single reef, parameterized to conditions found on the Great Barrier Reef. Results: Our results show that out‐plant density and size of the restoration area contribute to restoration success, particularly when disturbance pressure on the reef is limited. Specifically for the ecological context, we find that larval supply is an important driver of restoration success, with benefits predominantly increasing when larval supply is low and self‐retention is high. Thereby, restoring reefs where larval supply is low showed a four‐fold increase in benefits compared to doubling the restoration effort. Species composition is important with greater benefits predicted when the restored reef is not comprised of Acroporidae pre‐restoration. Benefits are also sensitive to the timing of disturbances, with post‐disturbance benefits increasing nonlinearly at reefs with low larval supply and retention until 10–12 years post‐restoration after which benefits are retained. Conclusions: Our results highlight the importance of context when designing and evaluating reef restoration as well as setting credible expectations of success. Implications for Practice: The context of a restoration impacts restoration success of coral reef interventions. When designing coral intervention strategies, prioritizing reefs with low larval supply and high retention could result in higher post‐restoration benefits in the absence of disturbances, compared to strategies that double the restoration effort. Higher restoration success can be achieved when restoring reefs that consist of a non‐Acroporidae composition pre‐restoration. Out‐planting thermally enhanced corals could double restoration benefits. Benefits can persist even after major disturbances, with benefits increasing the later a bleaching event occurs post‐restoration, specifically for reefs with low connectivity. [ABSTRACT FROM AUTHOR]
ISSN:10612971
DOI:10.1111/rec.70252