ET-29: Computer simulations of forest harvest policies

Eng-Leong Foo mtc Eng-Leong.Foo at
Tue Aug 16 02:06:34 EST 1994

ECOTECH'94 Computer Conference invites you to join the discussion of the 
paper entitled:
    Computer simulations of forest harvest policies
  using a spacing-sensitive model of forest succession

         by Ik Soo Lim*, Timothy Poston, R. E. Byers and Guo Junyao

*Institute of Systems Science, National University of Singapore,
Heng Mui Keng Terrace, Kent Ridge, Singapore 0511. e-mail: lis at

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We use a forest succession model to investigate various schemes of
forest harvest. The model simulates a 1/100-ha forest stand by
considering explicitly the birth, death, and growth of each tree in the
stand.  It also allows the harvest of any of the 40 species of
boreal forest trees considered, at any desired frequency. We assess
the consequences of the harvest of some commercial species by repeated
clear cutting or by repeated selective logging with or without refinement.
The model predicts that repeated selective logging with refinement could
be a promising harvest policy even in a boreal forest, as has
been successfully tested in a tropical forest.

Ik Soo Lim (lis at is an MSc student in systems science.  His
research interests are ecology modeling, virtual reality and neural
networks. He is developing a position dependent forest succession model
and preparing to construct an interface of virtual reality to ecological

Tim Poston (tim at is a mathematician, who has worked in South
and North America, Europe and Asia on applications of geometry and
dynamics.  He is now at the Institute of Systems Science of the National
University of Singapore, working with Johns Hopkins University on 3D
diagnostic software and with Zoology Dept colleagues on ecological

R.E. Byers (zoorejb at with a Ph.D. from the University of
Toronto, 1990, and an Ed.D. from the Ontario Institute for Studies in
Education, 1992, is a theoretical ecologist with an interest in renewable

Guo Junyao (zooguoj at is an applied ecologist and interested
in sustainable development for both agriculture and aquaculture.  He
worked in China on agroecosystems, and went to Britain to study the
effects of agroecosystem on the environment, especially underground water. 
He joined the National University of Singapore two years ago to study
Chinese mitten Crab and ecosystems. 

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