Table 2.

Phylotype richness, diversity indices, and evenness in microbial communities from the rhizosphere of S. stocksii and A. amnicola, non-rhizospheric soil samples, and brine lake-bank soil samples

Soil sample	Total number of OTUs	Phylotype richness (S)	Shannon–Wiener indexa (H)	Evennessb (EH)	Simpson indexc (D)
S. stocksii rhizosphere	47	32	3.22	0.86	0.941
A. amnicola rhizosphere	42	30	3.15	0.75	0.829
Non-rhizospheric soil samples	27	24	2.97	0.91	0.912
Brine lake-bank soil samples	27	23	2.95	0.85	0.821

^aShannon–Wiener index was calculated as H = − SUM[(pi) × ln(pi)] where pi is the frequency of the species

^bEvenness was calculated as H_max = ln(S)

^cSimpson index (D) was calculated as D = ∑(n / N)² where n = the total number of organisms of a particular species and N = the total number of organisms of all species. The value of Simpson index ranges between 0 and 1