That’s a Winogradsky column


I found this Winogradsky column setup for a microbiology class at UConn.  Windogradsky columns are setup with sediment from a pond, and are left to sit for several months allowing gradients and different layers of microorganisms to form similar to those in the natural environment.  This is certainly the most living Winogradsky column I have ever seen.  I am surprised there aren’t fish swimming around at the top.