Observable otus and alpha diversity

As shown in the attached table, the OHBF sample (in red) has a lower otus number than the yellow samples, but has a higher alpha diversity index than the yellow samples. What is the explanation to this? I thought that to greater number of observable otus greater diversity.alpha%20diversity

if these values were so closely correlated, there would be no reason to run each of them.

observed OTUs is just a simple count of unique features.

Shannon index takes into account # of unique counts but also the evenness with which they are observed.

Check out those equations and try inputting different values. You will see there is no contradiction in your results.

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