1. Objectives and Structure for a Grassland Simulation Model. - 1. 1 Introduction. - 1. 2 Objective. - 1. 3 Model Construction. - 1. 4 Pawnee Site and Data. - 1. 5 The Model. - 1. 6 The Structure of ELM. - 1. 7 Question Reviewed. - 1. 8 Additional Trials. - 1. 9 Conclusion. - References. - Appendix 1. A. SIMCOMP 3. 0. - References. - 2. Abiotic Section of ELM. - 2. 1 Introduction. - 2. 2 Model Development. - 2. 3 Validation of the Model. - 2. 4 Verification of the Weather Simulator. - References. - 3. A Simulation Model for Grassland Primary Producer Phenology and Biomass Dynamics. - 3. 1 Introduction. - 3. 2 Literature Review. - 3. 3 Phenology Submodel. - 3. 4 Carbon Submodel. - 3. 5 Conclusions. - References. - 4. A Mammalian Consumer Model for Grasslands. - 4. 1 Introduction. - 4. 2 Model Development and Overview. - 4. 3 Biological Components. - 4. 4 Results and Discussion. - 4. 5 General Discussion. - References. - 5. Simulation of Grasshopper Populations in a Grassland Ecosystem. - 5. 1 Introduction. - 5. 2 Model Overview. - 5. 3 Life-cycle Dynamics. - 5. 4 Interactions. - 5. 5 Results and Discussion. - References. - 6. A Simulation Model for Decomposition in Grasslands. - 6. 1 Introduction. - 6. 2 The Problem of Heterogeneous Substrates. - 6. 3 Decomposition under Variable Conditions. - 6. 4 Physical Transfers. - 6. 5 Decomposer Biomass. - 6. 6 Tuning the Model. - 6. 7 Model Performance. - 6. 8 Discussion. - References. - 7. A Grassland Nitrogen-flow Simulation Model. - 7. 1 Introduction. - 7. 2 Model Structure. - 7. 3 Model Output. - 7. 4 Discussion. - References. - 8. Simulation of Phosphorus Cycling in Semiarid Grasslands. - 8. 1 Introduction. - 8. 2 Review of Literature. - 8. 3 Model Structure and Development. - 8. 4 Soil Phosphorus Solubility and Plant Uptake. - 8. 5 Plant Translocation and Utilization of Phosphorus. - 8. 6 Decomposer Uptake and Turnover of Phosphorus. - 8. 7 Mineralization of Organic Phosphorus. - 8. 8 Model Simulation Results. - 8. 9 Conclusions. - References. - 9. Sensitivity Analyses of the ELM Model. - 9. 1 Introduction. - 9. 2 Tomovi?'s Sensitivity Analysis. - 9. 3 Parameter Perturbations. - 9. 4 Discussion. - References. - 10. Critique and Analyses of the Grassland Ecosystem Model ELM. - 10. 1 Introduction. - 10. 2 Model Objectives. - 10. 3 Analysis and Criticism of ELM in Relation to the Desired Goals of Modeling in the Grassland Biome Program. - References. - Author Index. Language: English