A method of growing specific types of microbes from the environment by providing the right environmental conditions (temperature, light, pH, etc.) and nutrients that select (enrich) for the desired type of microbe.  Winogradsky columns simultaneously enrich for multiple types of phototrophic microbes by generating multiple zones where specific type [..]

A technique used for isolating an organsi from a mixed culture by manipulating conditions that favor growth oh the organism sought and minimize growth of the other organisms present.