Table 2: Culture conditions for treatments and replicates of the experiment. The cultures were established during 10 weeks for a total of 135 Petri dishes inoculated with N. sphaericum.

Solid medium free of nitrogen and free of, or combined with, periphyton extractSolid medium with excessive nitrogen content and free of, or combined with, periphyton extract.Solid medium moderated in nitrogen content and free of, or combined with, periphyton extract

45 Petri dishesBG-110 + PE0BG-11 + PE0 + PE0
45 Petri dishesBG-110 + PE25BG-11 + PE25 + PE25
45 Petri dishesBG-110 + PE50BG-11 + PE50 + PE50