Primary producers -Phytoplankton Bacterioplankton
Figure 5 Illustration of a typical lake food web including nine groups of organisms (phytoplankton, bacterioplankton, benthic algae, macrophytes, herbivorous zooplankton, predatory zooplankton, zoobenthos, prey fish and predatory fish).
Calibration - Adjustment of variables within a model in order to achieve minimum bias.
Effect-load-sensitivity model - A quantitative model that uses information on mass balance of nutrients or toxins to predict important bioindicators such as fish production or algal biomass.
Food-web model - A model whose main objective is to predict the interactions of primary producers, herbivores, and carnivores within a lake ecosystem.
Generic variable - A rate or quantity used in modeling that is typical of most ecosystems or of a group of ecosystems.
Modeling scale - Resolution of a model expressed in terms of dimensions of time or space.
Site-specific variable - A rate or quantity used in modeling that is unique to a particular ecosystem.
Validation - Use of information not used in a model calibration to determine whether the calibration has been successful.
See also: Ecological Zonation in Lakes; Eutrophication of Lakes and Reservoirs.
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