Zusammenfassung: Very simple modells of pelagic marine and freshwater ecosystems have proved very successful and are increasingly widely used. These models are highly aggregated and based in biomass or particle size. Theoretical investigations based primarily on energy flow considerations have provided of the success of these models ans suggest possible ways to extend their applicability.
Schlüsselwörter: Ökosystem, Modell, Mathematik, Statistik