Table 2.

Formulas for the non-phylogenetic and phylogenetic α-diversity indices.

Non-phylogenetic indices		Phylogenetic indices
Richness	S	PD	$\sum _{t=1}^S{l}_t$
Shannon	$-\sum _{t=1}^S{w}_t\mathit{ln}{w}_t$	PE	$-\sum _{t=1}^S{l}_t{w}_t\mathit{ln}{w}_t$
Simpson	$\sum _{t=1}^S{w_t}^2$	PQE	$\sum _{t=1}^S{l}_t{w_t}^2$

^*S is the total number of species present in a sample, w_t is the relative abundance of the t-th species, and l_t is the length of the branches that belong to the t-th species in the phylogenetic tree for t = 1, …, S.

^*Richness, Shannon, Simpson, PD, PE and PQE represent the Species richness, Shannon, Simpson, PD, PE and PQE indices, respectively.