1. General Model Information

Name: Tropical forest model with spatially explicit interaction

Acronym: TROLL

Main medium: terrestrial
Main subject: population dynamics, forestry
Organization level: Organism
Type of model: individual-based, 3D, gap model,
Main application: Research
Keywords: individual-based model, spatially-explicit interaction for light


Dr. J. Chave
department of Ecology and Evolutionary Biology
Princeton University
Princeton NJ 08544 USA
Phone: (609) 258 6884
Fax: (609) 258 1334
email: chave@eno.princeton.edu


Dr J. Chave


TROLL is an individual-based forest growth model, designed to run for large plots of dense natural forests, with special emphasis on neotropical rainforests. The space resolution is 1 m, and the competition for light is spatially-explicit, occuring within voxels of size 1m x 1m x 0.5m. Growth and mortality modules are similar to those of a classic gap model. The seed dispersal module is spatially explicit (eg. each produced seed is dispersed at a distance drawn from a dispersal kernel). Plot size over 1 square kilometers have been simulated using a parallel computer (Cray T3E) and real-time message-passing across processors (MPI). Now, TROLL is running on the Compaq SC232 of the Commissariat a l'Energie Atomique (Grenoble, France).

II. Technical Information

II.1 Executables:

Operating System(s): UNIX-based

II.2 Source-code:

Programming Language(s): C++ upon request to the author

II.3 Manuals:

upon request to the author

II.4 Data:

III. Mathematical Information

III.1 Mathematics

III.2 Quantities

III.2.1 Input

III.2.2 Output

IV. References

Study of structural, successional and sptial patterns in tropical rain forests using TROLL, a spatially explicit forest model, J. Chave, Ecological Modelling, 124, 233-254 1999

V. Further information in the World-Wide-Web

VI. Additional remarks

Last review of this document by: Fri Mar 17 23:36:36 2000
Status of the document: Contributed by J. Chave
last modified by Tobias Gabele Wed Aug 21 21:44:51 CEST 2002

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