Title | A comparative modelling study of plant growth systems in a desert ecosystem |
Publication Type | Thesis |
Year of Publication | 1974 |
Authors | Reynolds J.F |
Number of Pages | 68 |
Date Published | 1974 |
University | New Mexico State University |
City | Las Cruces, New Mexico |
Thesis Type | Ph.D. Dissertationpp |
Call Number | 00269 |
Keywords | dissertation, dissertations, model, level-rate, model, pulse-reserve, model,comparative, model,plant growth, plant growth system,model, productivity,model, theses, thesis |
Abstract | The use of modeling as a tool in ecosystem analysis has mushroomed in recent years.... Two possible modeling approaches are within quantitative and a qualitative formats. The quantitative approach in ecology usually incorporates the level-rate paradigm of Forrester, utilizing systems of differential equations to describe component relationships. A high level of model precision is one of the objectives. The qualitative approach, as used here, incorporated the pulse-reserve paradigm of Bridges, utilizing blocks of logic statements to test for the presence or absence of specific driving variables. A high level of model realism is one of the goals using this technique. Although void of functional relationships or mechanisms, the pulse-reserve model did offer long-term stability. The reserve-trigger-pulse sequence of the model is biologically real and represents an adaptive strategy for organisms in arid environments. The possibility of expanding this approach for and entire system is discussed. A model is proposed that incorporates the more precise level-rate formulation for primary producers and the pulse-reserve paradigm for higher trophic levels. |