CAMPUS-S - The model of ground layer vegetation populations in forest ecosystems and their contribution to the dynamics of carbon and nitrogen. I. Problem formulation and description of the model

摘要

The CAMPUS-S model was developed to simulate ground-layer vegetation populations in forest ecosystems and their contribution to carbon and nitrogen dynamics. The model uses several modeling techniques: matrix, L-systems and cellular automata modeling. The genetic species-specific features are defined for each ontogenetic stage (L-systems), while their implementation for certain individuals in the course of modeling depends on external conditions (cellular automata). To implement the variance of the transitions between ontogenetic stages, the matrix modeling method is used. The spatial resolution of the model is 1 cm(2) and the time step is one month. The model consists of two submodels: a submodel of the plant populations' structure, and a submodel of carbon and nitrogen dynamics in plants and soil. The space in the CAMPUS-S model is heterogeneous. The map of the microrelief is dynamically loaded from an external source, according to which the temperature and the moisture of the soil are distributed across space during the simulation. To implement the feedback mechanism between plants and soil, integration with the Romul_Hum model is performed.