Figure 1: The rank abundance curves of the four samples, out of the 49 samples that were successfully fitted to Etienne’s neutral model.
From: Testing the Neutral Theory of Biodiversity with Human Microbiome Datasets

The four samples represent the four different sites from four different individual subjects: throat (Subject ID: 700110166), left antecubital fossa (Subject ID: 700102129), right antecubital fossa (Subject ID: 700106174), and stool (Subject ID: 700106979). In the figure, the solid red lines are observed data and the black dash lines are artificial (simulated) datasets. The X-axis is the species rank order in abundance and Y-axis is the abundance of each species in natural logarithm.