Early Ecosystem Function Recovery at the Restoration Site
Our Nusa Penida Restoration Site Makes It Into the Scientific Literature
We are thrilled to share that research conducted at Blue Corner's coral restoration site in Nusa Penida has been officially published in the international peer-reviewed journal Thalassas: An International Journal of Marine Sciences (Springer Nature). The study was a collaboration between Blue Corner Marine Research Student Natalia Lorenzo-Garcia, and Blue Corner Director Andrew CF Taylor, alongside our local team of marine biologists on the water every day to gather the data that made it possible.
A Student, a Research Team, and a Reef in Recovery
Coral restoration is booming globally — but how do we actually know whether a restored reef is recovering, not just surviving? That's the question the research team set out to answer. They designed and implemented a rigorous underwater monitoring framework across 76 artificial reef structures at our north Nusa Penida restoration site.
The research was with lots of diving - photographing structures from every angle, counting colonies by genus, recording predators, measuring coral diameters from images, and painstakingly building a database that captured the biological story unfolding below the surface. This is science done the FUN way — in the water, by hand, structure by structure.
Going Beyond "Is the Coral Alive?"
Most restoration monitoring stops at asking whether transplanted corals survived. This study went much further, treating the restoration site as a developing ecosystem and asking whether ecological processes — not just coral cover — were starting to function again. The monitoring framework tracked benthic succession, colony recruitment, structural growth, predator–prey interactions, and transplant health all at once.
A reef with corals is not the same as a functioning reef. Recovery means new colonies are settling, predators are responding to prey, hard and soft corals are competing for space, and ecological relationships are re-forming. This study shows those processes are already visible within the first year at our site.
What the Data Revealed
The results paint an encouraging picture of early ecosystem development at the site. Here are the headline findings:
- Benthic succession is underway. Both live hard coral and soft coral cover increased significantly with structure age across the 1–12 month monitoring window, while nutrient indicator algae — a sign of poor water quality — remained flat throughout.
- Diversity drives recruitment. Structures supporting a greater number of coral genera also hosted significantly more newly established colonies (Spearman ρ ≈ 0.57), suggesting that a diverse transplant mix creates better conditions for colonisation.
- Fragmentation dominates early colonisation. 77% of new colonies arrived through fragment retention rather than larval settlement — a pattern consistent with high-energy reef environments and the biology of branching genera like Acropora.
- Predators are tracking prey. Drupella snail abundance correlated with live coral cover overall, but the most ecologically meaningful signal only appeared when Acropora-specific analyses were run — showing that predator–prey dynamics are already genus-specific and ecologically structured.
- Depth is a management signal. Dead coral cover was associated with greater depth, suggesting that future transplantation work may benefit from prioritising shallower positions within the site.
"Analysing relationships among monitoring indicators can reveal early ecosystem development at restoration sites while identifying practical metrics suitable for long-term monitoring programs."
The Monitoring Framework Itself Is a Contribution
Beyond the ecological findings, the study makes a methodological contribution. The team developed and validated a field-deployable monitoring protocol combining diver observation with orthogonal photography and ImageJ image analysis — an approach designed to be rigorous enough for peer-reviewed science while remaining practical for community-based and volunteer-supported monitoring programmes.
A photographic catalogue of every structure was built as a baseline for long-term comparison, and the statistical analysis used Spearman rank correlations with Benjamini–Hochberg correction to handle the non-normal distributions typical of ecological field data. The result is a replicable framework that other restoration practitioners in the Coral Triangle and beyond can adapt to their own sites.
What Comes Next
This paper establishes a baseline. The coral community documented here — Acropora, Porites, Echinophyllia, Goniopora, and others — already closely resembles the natural reef communities described along Nusa Penida's northern coastline, suggesting the site is developing in ecologically appropriate directions.
Future monitoring will track how colony fusion events contribute to structural complexity, whether restored colonies reach sexual maturity and begin contributing larvae to the broader reef, and how predation pressure evolves as the reef matures. The frameworks and baselines established in this study make all of that possible.
Restoration work at the site continues, led by Blue Corner Marine Research and supported by the Nusa Penida Marine Protected Area. If you're interested in getting involved — as a student researcher, volunteer diver, or supporter — we'd love to hear from you.
Read the Full Study
Published in Thalassas: An International Journal of Marine Sciences, Springer Nature, March 2026.
Research Article → Get Involved