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.
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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