摘要：AbstractThe sensitivity of outputs and structures of different individual-based models were compared across two different predator-prey systems; Panthera Population Persistence (PPP) and Backswimmer-Daphnia (Notonecta IBM). The PPP model is spatially explicit, whereas in the food-uptake-submodel of the Notonecta IBM, distances are empirically included in differential equations. Both models differ significantly in their complexity and detailedness of process description. The PPP considers 29 parameters, whereas the backswimmer submodel (in its curent state) includes 8 parameters and is less complex. Extensive sensitivity analyses using improved Morris methods (PPP model) and/or the One Factor At A Time (OAT) screening technique (backswimmers) reveal that, in both models, the foragung radius is the most important factor beside all other factors and processes considered. A review of publications presenting various prey-predator models confirms this as a general pattern. The results suggest to carefully consider spaces within foraging models, independent of predator-prey-system and model type.
