Takashi S. Kohyama

甲山  隆司

Plant and forest ecology; species coexistence; tree architecture; tree demography

Census team at Tomakomai "Green Tunnel" Plot (since 1994)

8 October 2018

Research Interest

I am interested in solving possible mechanisms that promote coexistence of tree species in  natural forests. To tackle this question, I am examining inter- and intra-specific variation in tree allometry and demography in various forest ecosystems. My main concern is the role of one-sided competition among individual trees for light in forest structure, proposing "forest architecture hypothesis" (1993) , "stratification theory" (2009), and "foliage partitioning mechanism" (2012), Our recent interests are to develop bias-reduced estimation of demographic (2018) and net production rates (2019) from repeated forest tree censuses, and to evaluate proposed trade-offs for coexistence viewed from the productivity allocation among species (2020).

at Mt. Chitokaniushi (28 March 2021)

Professor Emeritus, Faculty of Environmental Earth Science, Hokkaido University

Affiliated Professor, Center for Southeast Asian Studies, Kyoto University


ResearcherID (Publons): A-4031-2012

ORCID ID: 0000-0001-7186-8585

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