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Spatial considerations in physiological models of tree growth.
Peter J. H. Sharpe1, Joe Walker, Les K. Penridge
1Biosystems Research Group, Department of Industrial Engineering, Texas A&M University, College Station, TX 77843, USA.
Tree Physiology
|December 1, 1986
Summary
This study introduces Ecological Field Theory (EFT) and the Continuous-Time Markov (CTM) method to model plant competition. These approaches integrate resource competition into plant growth models for mixed communities.
Area of Science:
- Ecology
- Plant Physiology
- Mathematical Modeling
Background:
- Modeling competitive interactions in mixed-plant communities is challenging.
- Existing models often lack physiological basis or spatial detail.
Purpose of the Study:
- To develop a novel methodology for incorporating plant competition into physiologically-based models.
- To create a framework applicable to mixed growth-form plant communities.
Main Methods:
- Ecological Field Theory (EFT) was developed to map resource availability influenced by plant structures (crowns, roots, stems).
- A Continuous-Time Markov (CTM) method was employed to couple water, light, and nutrient dynamics into a single plant growth equation.
Main Results:
- The study presents a two-step solution integrating spatial influences and physiological growth.
- The methodology was applied to a semiarid woodland community in Australia, demonstrating its practical application.
Conclusions:
- The proposed EFT and CTM METHOD provide a robust framework for modeling plant competition in mixed communities.
- This approach enhances the physiological realism and spatial accuracy of plant growth simulations.