1. General Model Information

Name: Model of alkaline grassland ecosystems

Acronym: MAGE


Main medium: terrestrial
Main subject: biogeochemistry
Organization level: ecosystem
Type of model: compartment model, ordinary differential equations
Main application: research
Keywords: grassland, soil alkalization, harvest control, soil water, dealkalization, vegetation dynamics, cation movement

Contact:

Qiong Gao
Institute of Botany
The Chinese Academy of Science
Beijing 100 044
China

Phone: (+86)-10-8353831 . 294
Fax: (+86)-10-8319534
email: gaoq@bnu.edu.cn

Author(s):

Abstract:

MAGE is an area-based model for alkaline grassland ecosystems. It was developed to address the problems associated with the soil alkalization/dealkalization processes coupeld with surface vegetation on Songnen Plain, northeast China. The model gave special consideration to the variation of soil characteristics such as water retentivity and hydraulic conductivity as functions of surface vegetation. Vegetation dynamics is modeled as multiple plant species succession, with competition between species reflected as soil water sharing and species niche overlapping along soil water and alkali axis. Surface vegetatin dynamics and optimal harvesting control in light of maximum harvest subject to system stability can be simulated. MAGE consist of submodels simulating


II. Technical Information

II.1 Executables:

Operating System(s): MS-DOS

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

Qiong Gao, Xiusheng Yang, Rui Yun, Chunping Li 1996. MAGE, a dynamic model of alkaline grassland ecosystems with variable soil characteristics.
Ecological Modelling, 93, 19-32.

Qiong Gao, Mei Yu, Chunping Li, Rui Yun 1998. Effects of ground water and harvest intensity on alkaline grassland ecosystem dynamics - a simulation study.
Plant Ecology, 135: 165-176.


V. Further information in the World-Wide-Web


VI. Additional remarks


Last review of this document by: T. Gabele: 07.07. 1997 State of document: -
Status of the document:
last modified by Joachim Benz Thu Apr 1 18:38:32 CEST 2004

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