1. General Model Information

Name: Unified Life Models

Acronym: ULM

Main medium: all
Main subject: populationdynamics
Organization level: population
Type of model: not specified
Main application: research, education
Keywords: life cycle, competition, parasitism, migrations, demographic process, metapopulation, discrete dynamic systems, stochastic model, Monte Carlo simulation, matrix population models


Stéphane Legendre

Laboratoire d'Ecologie, Ecole Normale Supérieure,
46 rue d'Ulm,
75230 Paris Cedex 05,

Phone: (33) 01 44 32 37 01
Fax : (33) 01 44 32 38 85
email: legendre@ens.fr


Stéphane Legendre


How does ULM work ?

Models are described in a text file according to a reduced declaration language, close to the mathematical formulation. The program is run with the model file as input and the system can be studied interactively by means of simple commands producing convenient graphics and numerical results. The kernel of ULM is a symbolic evaluator. Stochastic models are handled via Monte Carlo simulation.

What can be modeled ? Which results ? and also

Author of the abstract: Stéphane Legendre

II. Technical Information

II.1 Executables:

Operating System(s): Windows 3.xx see section V.
ULM is distributed free of charge. Users are under their own responsibility.
Click here to download autoulm.exe (154 Ko) self-extracting file

II.2 Source-code:

Programming Language(s):

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

Caswell, H., 1989. Matrix Population Models.
Sinauer Associates Inc.,Sunderland, MA, USA.

Ferrière, R., Sarrazin, F., Legendre, S., Baron, J-P., 1996. Matrix population models applied to viability analysis and conservation: Theory and practice with ULM software,
Acta OEcologica, 17.

Legendre, S., Clobert, J., 1995. ULM, a software for conservation and evolutionary biologists,
Journal of Applied Statistics, 22, 817-834.

Tuljapurkar, S., 1990. Population Dynamics in Variable Environments,
Lecture Notes in Biomathematics, Springer Verlag, Germany.

V. Further information in the World-Wide-Web

VI. Additional remarks

Last review of this document by: T. Gabele: Tue Oct 7 1997
Status of the document: - preliminary
last modified by Tobias Gabele Wed Aug 21 21:44:51 CEST 2002

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