What is shannon wiener species diversity index - Definition and Meaning

Shannon Wiener Species Diversity Index :

Shannons Wiener Diversity index is the degree of uncertainty of predicting the species of a random sample is related to the diversity of a community and is based on measuring uncertainty.


Formula :

H = -SUM[(pi) * ln(pi)] E=H/Hmax

Example :

Sample Values(S) = 60,10,25,1,4 number of species(N) = 5
No of samplepi=sample/sumlog(pi)pi*log(pi)
600.60-0.51-0.31
100.10-2.30-0.23
250.25-1.39-0.35
10.01-4.61-0.05
40.04-3.22-0.13
sum=100SUM = -1.07
H=1.07 Hmax=log(N)=log(5)=1.61 shannon index diversity(H)=1.07 E=H/Hmax=1.07/1.61=0.66 Evenness =0.66

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