Dear José,

I strongly recommend the book: "Pla, L., Casanoves, F. & Di Rienzo, J. (2012). Quantifying Functional Biodiversity. Springer". You will find every detail on the different approaches used to measure functional diversity, as well as when and how to use them.

If you do not have access to the book, please contact me.

Good luck.

Thank you!

I do not have the book.

It's actually good to incorporate species richness in FD indices because if an area is highly speciose, but all of those species are doing the same thing, then we can stand to lose a few species and not lose any functionality. Oppositely, if an area has few species, but all of them are doing something different, then we can’t lose any species without sacrificing some functionality :)

It is related to your aims and expectance from ecosystem services.

See this file:)

Thank's!