Summary: In this paper we present a method of constructing functional selection, optimization of which on set parameters that distinguish competing species endowed with both spatial and age-continuous structure, it allows among many \(\Lambda\) allocate such numbers \(\lambda\in\Lambda\) that can match the types that can serve as the only survivors in the stability of stationary distributions. We construct optimized functional biological communities for continuous space-age structure. Functional selection are calculated on the basis of available information on the steady-state distributions and optimized the parameters, signicant from the point of view of evolutionary selection. And as an example of using built by this method for finding the functional structure of a suitable stationary distribution.