A phytoplankton compartment model for a small meromictic lake with special reference to species-specific niches and long-term changes

As a first step towards a larger ecosystem model mainly the photosynthesis-light-temperature responses of phytoplankton were evaluated. The iterative procedure to optimize the prognostic value of the modelling equations is based on multiple regression analysis and residual statistics. Within the evaluations vertical, seasonal and long-term variability of phytoplankton were considered in order to identify the specific situation in the lake.