How to measure biodiversity indices, species evenness, species richness, dominance, and predominance??

To measure biodiversity indices, species evenness, species richness, dominance, and predominance we can using Shannon's diversity index and Sympson's diversity index. 

1) Simpson’s diversity index calculates a diversity score for a community (for the plant). It is based on both the number of different species in the community, and the number of individuals present for each of those species. The higher the score, the more diverse the community is considered to be. To calculate Simpson’s diversity index use the equation below:

∑ = sum of (total)

n = the number of individuals of each different species

N = the total number of individuals of all the species

2) In the Shannon index, p is the proportion (n/N) of individuals of one particular species found (n) divided by the total number of individuals found (N), ln is the natural log, Σ is the sum of the calculations, and s is the number of species.