1. General Model Information

Name: US IBP(International Biological Program) Grasslands Biome Ecosystem Model

Acronym: ELM_IBP

Main medium: terrestrial+
Main subject: biogeochemistry
Organization level:
Type of model: not specified
Main application:
Keywords: nitrogen, carbon, phosphorus, nutrient cycle, grassland, Great Plains, decomposition, soil water, consumer, development


George M. Van DyneDirector US IBP Grassland Biome Study 1967-1974College of Forestry and Natural ResourcesColorado State University, Fort Collins, Colorado 80523,USAJ.C.AnwayUS/IBP Grassland Biome, Natural Resource Ecology LaboratoryColorado State University, Fort Collins, Colorado 80523, USA.Present adress:School of Applied Science, Canberra College of Advanced Education,P.O. Box 381, Canberra City A.C.T. 2601, Australia G.S. InnisDepartement of Wildlife Sciences, Utah State University,Logan, Utha 84322, USA
Fax :



The objectives of the modelling efforts in the US/IBP Grassland Biome were to stimulate the precise formulation of ideas about the behavior of the system, help direct the research effort through the identification of critical areas for study, and produce a tool for investigating the consequences of management alternatives. The objectives of the model were to simulate biomass dynamics in a variety of grassland types and the response of the system to irrigation, fertilization, and cattle grazing. The model was constructed over a period of several years by a team of investigators, each of whom assumed responsibility for one of the component submodels: i.e., abiotic, producers, mammals, grasshoppers, decomposere, nitrogen, and phosphorus. The primary information source used in developing this model was the US/IBP Grassland Biome intensive study site, Pawnee.

(from: Innis, G.S.: Grassland Simulation Model. Springer Verlag, New York, 1978, p.1)

II. Technical Information

II.1 Executables:

Operating System(s):

II.2 Source-code:

Programming Language(s): SIMCOMP, FORTRAN 4

II.3 Manuals:

II.4 Data:

III. Mathematical Information

III.1 Mathematics

III.2 Quantities

III.2.1 Input

III.2.2 Output

IV. References

Innis, G.S., 1978.Grassland Simulation Model.Springer Verlag, New York Heilelberg Berlin.
Pendelton D.F., Menke J.W., Williams W.A., Woodmansee, 1983.Annual Grassland Ecosystem Model. Hilgardia (51), p.1-44.
Parton W.J.; Innis G.S.; Hanson J.D., 1985. Plant growth and production of grassland ecosystems,a comparison of modelling approaches. Ecological Modelling (29,1-4), p. 131-144.

V. Further information in the World-Wide-Web

VI. Additional remarks

Last review of this document by: R. Patzak : 16. September 1997 -
Status of the document:
last modified by Joachim Benz Tue Feb 18 18:45:31 CET 2003

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