FIG. 3.

Variability in species richness within a farm during the three phases determined by average microhabitat and total habitat protozoan diversity. Diversity was assessed on the basis of morphology per broiler house (shown for the three main protozoan morphogroups: ciliates, flagellates, and amoebae) (A) and genetic profiling (B). *, no samples could be taken; 0, no protozoa were detected. The different broiler houses at any one farm are designated X1 to X4, and X1+X2 stands for samples from sources common to the indicated broiler houses (e.g., water from the well and litter and food from the supply). Error bars indicate the standard deviations.