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Loke Ming Chou, Shu Qin Sam, Tai Chong Toh, Chin Soon Lionel Ng


Singapore’s marine environment has changed significantly over the past five decades through coastal modification and intense human activities. More than 60% of its coral reefs have been lost to land reclamation and the remaining reefs remain exposed to increased sedimentation. Reef restoration to address habitat loss and degradation is considered viable under the changing environmental conditions based on the persisting annual coral mass spawning events, active recruitment, high species diversity and recovery from mass bleaching impacts. These ecological attributes indicate that reef ecosystem integrity is still functioning and restoration measures are relevant. An analysis of past and ongoing restoration initiatives indicates their effectiveness in improving degraded reefs as well as establishing new reef communities on modified coasts.


Coral reefs, restoration, degradation, changing environment.

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Hilton, M. J., and Manning, S. S., 1995. Conversion of Coastal Habitats* in Singapore: Indications of Unsustainable Development. Environmental Conservation, 22(4), 307–322.

Chou, L. M., 2006. Marine habitats in one of the world’s busiest harbours. In The environment in Asia Pacific harbours (pp. 377–391). Springer, Dordrecht; doi:10.1007/1-4020-3655-822.

Lai, S., Loke, L. H., Hilton, M. J., Bouma, T. J., and Todd, P. A., 2015. The effects of urbanisation on coastal habitats and the potential for ecological engineering: A Singapore case study. Ocean & Coastal Management, 103, 78–85.

Chou, L. M., 2010. Marine ecosystems. In: Ng, P. K., Corlett, R., & Tan, H. T. (Eds.). Singapore biodiversity: an encyclopedia of the natural environment and sustainable development. Editions Didier Millet. Pp. 76–87.

Huang, D., Tun, K. P., Chou, L. M., and Todd, P. A., 2009. An inventory of zooxanthellate scleractinian corals in Singapore, including 33 new records. Raffles Bulletin of Zoology, 22, 69–80.

Guest, J., Baird, A., Goh, B., and Chou, L., 2002. Multispecific, synchronous coral spawning in Singapore. Coral Reefs, 21(4), 422–423.

Ng, C. S. L., Toh, T. C., and Chou, L. M., 2016. Coral restoration in Singapore’s sediment-challenged sea. Regional Studies in Marine Science, 8, 422–429. doi:10.1016/j.rsma.2016.05.005

Tay, Y. C., Todd, P. A., Rosshaug, P. S., and Chou, L. M., 2012. Simulating the transport of broadcast coral larvae among the Southern Islands of Singapore. Aquatic Biology, 15(3), 283–297.

Guest, J. R., Tun, K., Low, J., Vergés, A., Marzinelli, E. M., Campbell, A. H., Bauman, A. G., Feary, D. A., Chou, L. M., and Steinberg, P. D., 2016. 27 years of benthic and coral community dynamics on turbid, highly urbanised reefs off Singapore. Scientific reports, 6, 36260. doi:10.1038/srep36260

Guest, J. R., Low, J., Tun, K., Wilson, B., Ng, C., Raingeard, D., Ulstrup, K. E., Tanzil, J. T. I., Todd, P. A., Toh, T. C., McDougald, D., Chou, L. M., and Steinberg, P. D., 2016. Coral community response to bleaching on a highly disturbed reef. Scientific Reports, 6, 20717. doi:10.1038/srep20717

Ming, C. L., Lionel, N. C. S., Jeremy, C. S. M., and Angie, S. L., 2010. Natural coral colonization of a marina seawall in Singapore. Journal of Coastal Development, 14(1), 11-17.

Ng, C. S. L., Ng, S. Z., & Chou, L. M. (2012). Does an ex situ coral nursery facilitate reef restoration in Singapore’s waters. Contributions to Marine Science. National University of Singapore, Republic of Singapore, 95-100.

Chou, L. M., 1991. The early establishment of fish communities at artificial reef structures in Singapore water. Journal Singapore National Academy of Science. 18, 38–41.

Low, J. K., and Chou, L. M., 1994. Sedimentation rates in Singapore waters. In Proc 3rd ASEAN-Aust Symp Living Coral Resources (Vol. 2, pp. 697–701).

Loh, T. L., Tanzil, J. T. I., & Chou, L. M. (2006). Preliminary study of community development and scleractinian recruitment on fibreglass artificial reef units in the sedimented waters of Singapore. Aquatic Conservation: Marine and Freshwater Ecosystems, 16(1), 61-76.

Afiq-Rosli, L., Taira, D., Loke, H. X., Toh, T. C., Toh, K. B., Ng, C. S. L., Cabaitan, P. C., Chou, L. M., and Song, T., 2017. In situ nurseries enhance coral transplant growth in sedimented waters. Marine Biology Research, 13(8), 878–887.

Edwards, A. J., and Gomez, E. D., 2007. Reef restoration concepts and guidelines: making sensible management choices in the face of uncertainty. Coral Reef Targeted Research & Capacity Building for Management Programme, St Lucia, Australia.

Chou, L. M., Yeemin, T., Yaman, A. R. B. G., Vo, S. T., and Alino, P., 2009. Coral reef restoration in the South China Sea. Galaxea, Journal of Coral Reef Studies, 11(2), 67–74. doi:10.3755/galaxea.11.67.

Ng, C. S. L., Toh, T. C., and Chou, L. M., 2017. Artificial reefs as a reef restoration strategy in sediment‐affected environments: Insights from long‐term monitoring. Aquatic Conservation: Marine and Freshwater Ecosystems, 27(5), 976–985.

Ng, C. S. L., and Chou, L. M, 2017. Coral reef restoration in Singapore - past, present and future. In: Lin-heng, L. I., Narayana, K. S., & Harvey, N., (Eds.). Sustainability Matters: Environmental Management in the Anthropocene. Singapore: World Scientific, Pp. 3–23. doi:10.1142/9789813230620_0001

Bongiorni, L., Giovanelli, D., Rinkevich, B., Pusceddu, A., Chou, L. M., and Danovaro, R.. 2011. First step in the restoration of a highly degraded coral reef (Singapore) by in situ coral intensive farming. Aquaculture, 322-323, 191–200.

Poquita-Du, R. C., Ng, C. S. L., Loo, J. B., Afiq-Rosli, L., Tay, Y. C., Todd, P. A., Chou, L. M., and Huang, D., 2017. New evidence shows that Pocillopora ‘Pocilloporadamicornis-like’corals in Singapore are actually Pocillopora acuta (Scleractinia: Pocilloporidae). Biodiversity data journal, 5, e11407. doi:10.3897/BDJ.5.e11407.

Ng, C. S. L., and Chou, L. M., 2014. Rearing juvenile ‘corals of opportunity’in in situ nurseries–A reef rehabilitation approach for sediment-impacted environments. Marine Biology Research, 10(8), 833-838. doi:10.1080/ 17451000.2013.853124

Babcock, R., and Mundy, C., 1996. Coral recruitment: consequences of settlement choice for early growth and survivorship in two scleractinians. Journal of Experimental Marine Biology and Ecology, 206(1-2), 179–201.

Chou, L. M., Toh, T. C., and Ng, C. S. L., 2017. Effectiveness of Reef Restoration in Singapore’s Rapidly Urbanizing Coastal Environment. International Journal of Environmental Science and Development, 8(8), 576–580. doi:10.18178/ijesd.2017.8.8.1018

Shafir, S., and Rinkevich, B., 2010. Integrated long-term mid-water coral nurseries: a management instrument evolving into a floating ecosystem. University of Mauritius Research Journal, 16, 365–386.

Taira, D., Toh, T. C., Ng, C. S. L., Sam, S. Q., and Chou, L. M., 2016. Coral nurseries as habitats for juvenile corallivorous butterflyfish. Marine Biodiversity, 47(3), 787–788.

Toh, T. C., Ng, C. S. L., Loke, H. X., Taira, D., Toh, K. B., Afiq-Rosli, L., Du, R. C. P., Cabaitan, P., Sam, S. Q., Kikuzawa, Y. P., Chou, L. M., and Song, T., 2017. A cost-effective approach to enhance scleractinian diversity on artificial shorelines. Ecological Engineering, 99, 349–357. doi:10.1016/j.ecoleng.2016.11.066

Chou, L. M., 2016. Rehabilitation Engineering of Singapore Reefs to Cope with Urbanization and Climate Change Impacts. Journal of Civil Engineering and Architecture. 10, 932–936. doi:10.17265/1934-7359/2016.08.009.

Cheong, D., 2016, June 29. Sisters’ Islands to be heart of marine life conservation. Retrieved October 10, 2017, from

St John’s Island National Marine Laboratory, About Us (n.d.). Retrieved October 12, 2017, from

Spurgeon, J. P., and Lindahl, U., 2000. Economics of coral reef restoration. In: Cesar HSJ, editor. Collected essays on the economics of coral reefs. Kalmar, Sweden: CORDIO, Pp. 125–137.

Toh, T. C., Ng, C. S. L., Peh, J. W. K., Toh, K. B., and Chou, L. M., 2014. Augmenting the post-transplantation growth and survivorship of juvenile scleractinian corals via nutritional enhancement. PloS One, 9(6), e98529. doi:10.1371/journal.pone.0098529.

Cruz, D. W. D., Villanueva, R. D., and Baria, M. V. B., 2014. Community-based, low-tech method of restoring a lost thicket of Acropora corals. ICES Journal of Marine Science, 71(7), 1866–1875.

Ng, C. S. L., Lim, S. C., Ong, J. Y., Teo, L. M. S., Chou, L. M., Chua, K. E., and Tan, K. S., 2015. Enhancing the biodiversity of coastal defence structures: transplantation of nursery-reared reef biota onto intertidal seawalls. Ecological Engineering, 82, 480–486.


Journal of Marine Science and Technology ISSN: 1859 3097

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