Rebuilding coral reefs: success (and failure) 16 years after low‐cost, low‐tech restoration

Low-cost, low-tech coral reef restoration techniques can significantly boost hard coral cover over 16 years, according to one of the longest monitoring studies of its kind. The research, conducted in Komodo National Park, Indonesia, found that coral cover increased from 0% to an average of 44.5% on rehabilitated rubble fields—areas previously devastated by blast fishing—whereas untreated sites remained stagnant at around 3%. This success highlights the potential for simple substrate stabilization methods to facilitate natural coral recruitment and growth. However, outcomes varied widely across sites, suggesting that factors like current strength and turbidity also play crucial roles in restoration efficacy. The study underscores the importance of long-term monitoring to assess the true return on investment in reef rehabilitation efforts.

Fox, H. E., Harris, J. L., Darling, E. S., Ahmadia, G. N., Estradivari, & Razak, T. B. (2019). Rebuilding coral reefs: success (and failure) 16 years after low‐cost, low‐tech restoration. Restoration Ecology, 27(4), 862–869. Portico. https://doi.org/10.1111/rec.12935