TAN Tiang Wah, Hugh  陈长华 (陳長華)

Associate Professor

Contact Information:

Department of Biological Science
National University of Singapore
14 Science Drive 4
Singapore 117543

6516 2717
6779 2486

Academics Qualifications

PhD NUS, BSc Hons Sing. BSc Sing.

Research Areas

Conservation Biology, Plant Systematics and Ecology, Urban Greenery and Ecology, Restoration Ecology, Tropical Horticulture, Urban Agriculture

Current Projects

  • The vegetation and ecology of Nee Soon Swamp Forest, Singapore as part of the major project, Nee Soon Swamp Forest biodiversity and hydrology baseline studies
  • Forest regeneration and alien plant invasions after massive wind-generated tree falls at Mandai, Singapore
  • Regeneration of tropical secondary vegetation in human-modified landscapes
  • Pre- and post-dispersal predation of dipterocarps in Singapore forests
  • The ecology of nepenthesin production
  • The effects of drought on the urban vascular plant epiphytes of Singapore
  • The ecology of Cecropia pachystachya: A potential invasive species of Singapore forests
  • Is there a correlation between socio-economic status and the provision of green spaces in urban Singapore?
  • Use of native Singapore plant species of local provenance for landscaping parks and gardens, and streetscapes
  • Trialing the Three Sisters Cultivation Method on Singapore rooftops
  • The feasibility of aquaponics on Singapore rooftops

Current and Selected Previous Projects

Selected Publications

Nghiem, L. T. P., H. T. W. Tan & R. T. Corlett, 2015. Invasive trees in Singapore: are they a threat to native forests? Tropical Conservation Science, 18: 201-214.

Chong, K. Y., S. Teo, B. Kurukulasuriya, Y. F. Chung, S. Rajathurai & H. T. W. Tan, 2014. Not all green is as good: Different effects of the natural and cultivated components of urban vegetation on bird and butterfly diversity. Biological Conservation, 171: 299-309.

Yeo, H. H. T., K. Y. Chong, A. T. K. Yee, X. Giam, R. T. Corlett & H. T. W. Tan, 2014. Leaf litter depth as an important factor inhibiting seedling establishment of an exotic palm in tropical secondary forest patches. Biological Invasions, 16: 381-392.

Wee, A. K. S., K. Takayama, T. Asakawa, B. Thompson, Onrizal, S. Sungkaew, X. T. Nguyen, M. Nazre, K. K. Soe, H. T. W. Tan, Y. Watano, S. Baba, T. Kajita & E. L. Webb, 2014. Oceanic currents, not land masses, maintain the genetic structure of the mangrove Rhizophora mucronata Lam. (Rhizophoraceae) in Southeast Asia. Journal of Biogeography, 41: 954-964.

Nghiem, L. T. P., T. Soliman, D. C. J. Yeo, H. T. W. Tan, T. A. Evans, J. D. Mumford, R. P. Keller, R. H. A. Baker, R. T. Corlett & L. R. Carrasco, 2013. Economic and environmental impacts of harmful non-indigenous species in Southeast Asia. PLoS ONE, 8, article number e71255.

Chong, K. Y., S. Teo, B. Kurukulasuriya, Y. F. Chung, S. Rajathurai, H. C. Lim & H. T. W. Tan, 2012. Decadal changes in urban bird abundance in Singapore. The Raffles Bulletin of Zoology, Supplement 25: 189-196.

Giam, X., L. P. Koh, H. H. Tan, J. Miettinen, H. T. W. Tan & P. K. L. Ng, 2012. Global extinctions of freshwater fishes follow peatland conversion in Sundaland. Frontiers in Ecology and the Environment, 10: 465-470.

Chong, K. Y., S. M. L. Lee, A. T. Gwee, P. K. F. Leong, S. Ahmad, W. F. Ang, A. F. S. L. Lok, C. K. Yeo, R. T. Corlett & H. T. W. Tan, 2012. Herbarium records do not predict rediscovery of presumed nationally extinct species. Biodiversity and Conservation, 21: 2589-2599.

Giam, X., N. S. Sodhi, B. W. Brook, H. T. W. Tan & C. J. A. Bradshaw, 2011. Relative need for conservation assessments of vascular plant species among ecoregions. Journal of Biogeography, 38: 55-68.

Ng, P.K.L., R.T. Corlett and H.T.W. Tan (eds.), 2011. Singapore Biodiversity: An Encyclopaedia of the Natural Environment and Sustainable Development. Editions Didier Millet in association with the Raffles Museum of Biodiversity Research, National University of Singapore, Singapore. 552 pp.


Chong, K. Y., R. T. Corlett, D. C. J. Yeo & H. T. W. Tan, 2010. Towards a global database of weed risk assessments: A test of transferability for the tropics. Biological Invasions, 13: 1571-1577.

Giam, X., C. J. A. Bradshaw, H. T. W. Tan & N. S. Sodhi, 2010. Future habitat loss and the conservation of plant biodiversity. Biological Conservation, 143: 1594-1602.

Giam, X., T. H. Ng, V. B. Yap & H. T. W. Tan, 2010. The extent of undiscovered species in Southeast Asia. Biodiversity and Conservation, 19: 943-954.

Tan, H.T.W., L.M. Chou, D.C.J. Yeo and P.K.L. Ng. 2010. The Natural Heritage of Singapore. 3rd Edition. Prentice Hall/Pearson South Asia Pte Ltd, Singapore. 323 pp.


Chong, K. Y., H. T. W. Tan & R. T. Corlett, 2009. A Checklist of the Total Vascular Plant Flora of Singapore: Native, Naturalised and Cultivated Species. Raffles Museum of Biodiversity Research, National University of Singapore, Singapore. 273 pp. Uploaded 12 Nov.2009. [PDF, 1.03 MB]

Shi, A. Z., L. P. Koh & H. T. W. Tan. 2009. The biofuel potential of municipal solid waste. GCB Bioenergy, 1: 317-320.

Bradshaw, C. J. A., X. Giam, H. T. W. Tan, B. W. Brook & N. S. Sodhi. 2008. Threat or invasive status in legumes is related to opposite extremes of the same ecological and life-history attributes. Journal of Ecology, 96: 869-883.

Sodhi, N. S., L. P. Koh, S.-H. Peh, H. T. W. Tan, R. L. Chazdon, R. T. Corlett, T. M. Lee, R. K. Colwell, B. W. Brook, C. H. Sekercioglu & C. J. A. Bradshaw. 2008. Correlates of extinction proneness in tropical angiosperms. Diversity and Distributions, 14: 1-10.

Koh, L.P., H.T.W. Tan and N.S. Sodhi. 2008. Biofuels: Waste not, want not. Science, 320: 1419.

Tan, H. T. W., B. C. Tan, K.-x., Tan, Ali bin Ibrahim, P. T. Chew, K. S. Chua, H. Duistermaat, S. K. Ganesan, M. W. K. Goh, A. T. Gwee, R. Kiew, S. M. L. Lee, P. Leong, J. Lim, A. F. S. L. Lok, A. H. B. Loo, S. K. Y. Lum, T. Morgany, Saifuddin bin Suran, S. Sim, Haji Samsuri bin Haji Ahmad, Y. C. Wee, K. F. Yap, C. K. Yeo & J. W. H. Yong. 2008. Checklists of threatened species: Seed plants. In: Davison, G. W. H., P. K. L. Ng & H. C. Ho (eds.), The Singapore Red Data Book: Threatened Plants and Animals of Singapore. 2nd Edition. Nature Society (Singapore), Singapore. Pp. 213-244.

red data book cover-w250

Pandit, M. K., H. T. W. Tan & M. S. Bishi. 2006. Polyploidy in invasive plant species of Singapore. Botanical Journal of the Linnean Society, 151: 395-403.

Tan, H.T.W. 2006. Nature Reserve Parks, Gardens and Streetscapes: Today Singapore, Tomorrow the World. 10 pp.

Teo, D. H. L., H. T. W. Tan, R. T. Corlett, C. M. Wong & S. K. Y. Lum, 2003. Continental rain forest fragments in Singapore resist invasion by exotic plants. Journal of Biogeography, 30: 305-310.

Koh, L. P., N. S. Sodhi, H. T. W. Tan & K. S.-H. Peh, 2002. Factors affecting the distribution of vascular plants, springtails, butterflies and birds on small tropical islands. Journal of Biogeography, 29: 93-108.

Keng, H., S. C. Chin & H. T. W. Tan, 1998. A Concise Flora of Singapore. Volume II: Monocotyledons. Singapore University Press, Singapore. 215 pp. Available at NUS Publishing.


Turner, I.M., K.S. Chua, J.S.Y. Ong, B.C. Soong and H.T.W. Tan., 1996. A century of plant species loss from an isolated fragment of lowland tropical rain forest. Conservation Biology, 10: 1229-1244.

Tan, H. T. W. (ed.), 1995. A Guide to the Threatened Plants of Singapore. Singapore Science Centre, Singapore. 158 pp.
Turner, I. M., H. T. W. Tan, Y. C. Wee, Ali Ibrahim, P. T. Chew & R. T. Corlett, 1994. A study of plant species extinction in Singapore: lessons for the conservation of tropical biodiversity. Conservation Biology, 8: 705-712.

Hugh Tan’s 168 Selected Publications on Singapore Biodiversity