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 Ph.D., Researcher

Biodiversity Assessment and Projection Section
Center for Environmental Biology and Ecosystem Studies,
National Institute for Environmental Studies

Onogawa 16-2, Tsukuba City, Ibaraki 305-8506, Japan

Research Overview

In Southeast Asian tropics, forest area is disappearing rapidly due to increasing plantations and it is resulting in severe decrease of biodiversity. It is said that most of the lowland primary forests have already been destroyed in this region. In order to conserve biodiversity, my study focuses on the remnant forests used by the communities in Borneo; where small forest patches remain within a landscape of shifting-cultivation and provide people with timbers and/or non-timber forest products such as rattan and fruits. I am trying to assess how much species diversity these forests contain and to investigate the conservation value of the forests in maintaining regional biodiversity.
I am also conducting empirical and theoretical studies on the mechanisms of maintenance of species diversity. I have studied the phenomena of “general flowering” which occurs only in the Southeast Asian lowland tropical forests and have been monitoring the flowering events in Borneo for more than 10 years.

Specialties/ Key words

Southeast Asia, Tropical rain forest, plant reproductive ecology, community ecology, Biodiversity conservation, Ecosystem service, Indigenous and local knowledge

Publications (peer reviewed)

latest 5 papers

Kadoya, T., Takeuchi, Y., Shinoda, Y., Nansai, K. (2022) Shifting agriculture is the dominant driver of forest disturbance in threatened forest species’ ranges. communications earth & environment, 3, 108. new arrival updated May. 20, 2022

Diway B., Yasui Y., Innan H., Takeuchi Y. (2022) New locality and bud growth of the world biggest flower, Rafflesia tuan-mudae, in Naha Jaley, Sarawak, Malaysia. Tropics, 30, 4, 71-82.

Takeuchi Y., Ohtsuki H., Innan H. (2022) Non‐zero‐sum neutrality test for the tropical rain forest community using long‐term between‐census data. Ecology and Evolution, DOI : 10.1002/ece3.8462.

Takeuchi Y., Diway B. (2021) Long pollen dispersal prevents biparental inbreeding depression in seeds in a natural population of the tropical tree Shorea laxa. Forest Ecology and Management, 489, 119063

Takeuchi Y., Muraoka H., Yamakita T., Kano Y., Nagai S., Bunthang T., Costello M., Darnaedi D., Diway B., Ganyai T., Grudpan C., Hughes A., Ishii R., Lim P.T., Ma K., Muslim A., Nakano S., Nakaoka M., Nakashizuka T., Onuma M., Park C.H., Pungga S.R., Saito Y., Shakya M., Sulaiman M., Sumi M., Thach P., Trisurat Y., Xu X., Yamano H., Yao T.L., Kim E.S., Vergara S., Yahara T. (2021) The Asia-Pacific Biodiversity Observation Network: 10-year achievements and new strategies to 2030. Ecological Research, 36, 232-257

Takeuchi, Y, Kikuchi, S., Diway, B. (2020) Albinism and inbreeding depression in seedlings of the tropical tree, Shorea laxa. Journal of Forest Research, 25, 413-419

all publications

Books/ Book Sections

Takeuchi Y., Soda R., Samejima H. and Diway B. (2020) Current Status and Distribution of Communally Reserved Forests in a Human-modified Landscape in Bintulu, Sarawak, In: Ishikawa N. and Soda R. (eds), Anthropogenic Tropical Forests, Springer, pp. 453-478.

Takeuchi Y., Kobayashi A., and Diway B. (2020) Transitions in the Utilisation and Trade of Rattan in Sarawak: Past to Present, Local to Global, In: Ishikawa N. and Soda R. (eds), Anthropogenic Tropical Forests, Springer, pp, 479-496.

Y. Takeuchi, KK Shimizu. (2010) Potential application of pollen genotyping for evolutionary genetic and genomic studies: linkage/recombination analysis and haplotype sequencing, In: Yuji Isagi, Yoshihisa Suyama (eds) Single-pollen genotyping. Springer, Ecological Research Monograph series vol 1.

Y. Takeuchi, H. Samejima, M. Nakagawa, B. Diway, T. Nakashizuka. (2008) “Effects of Local Density and Forest Fragmentation on Reproductive and Regeneration Success of Shorea laxa (Dipterocarpaceae)”, In: M. Ichikawa, S. Yamashita, T. Nakashizuka (eds) Sustainability and Biodiversity Assessment on Forest Utilization Options, Research Institute for Human and Nature, Kyoto, pp. 227-233.

Last updated May. 20, 2022