What formula is used to calculate Chao1 and Chao2?

Hello Jarred,

Many of the diversity indexes are listed, described, and cited in this thread:

Chao1, Chao2, and ACE are sort of the same thing.

Formula here:
https://rdrr.io/cran/vegan/man/specpool.html

P.S. Does that help answer your question?
P.P.S. Welcome to the forums! :qiime2:

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