I'm analyzing a dataset of fungal sequences and so far it's going quite well. However, I'm not sure if I am understanding well some outputs of the core metrics. I am mostly interested in alpha diversity and therefore I am looking at "shannon", "evenness" and "observed features".
My question is: what does "observed features" means or being more specifically, what is the meaning of the numbers in the y axis ?
I am confused because I thought I would have to see in the y axis the number of ASVs. In my feature table, the final number of ASVs is 122. In the graph, the maximum value in the y axis is 38. Therefore I thought it could mean OTU ?!
Thank you so much!