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sci.biodiversity-Shannon-index Calculator
Calculates Shannon diversity index H' = −Σpᵢ ln(pᵢ) and Pielou's evenness J = H'/H_max for a biological community. H' ranges from 0 (monodominance) to ln(S) where S is species richness — H' and evenness separate the contributions of richness and abundance distribution to biodiversity.
Inputs
N1
Reference formula or conversion factor shown for context.
N2
Reference formula or conversion factor shown for context.
N3
Reference formula or conversion factor shown for context.
N4
Reference formula or conversion factor shown for context.
N5
Reference formula or conversion factor shown for context.
Results
Shannon index H\
A normalised score comparing the result to a reference baseline.
Pielou evenness J = H/Hmax
Sample size or count used in the calculation.
species richness S
Sample size or count used in the calculation.
total individuals N
The combined total across all inputs and components.
H\
Reference formula or conversion factor shown for context.
interpretation
Qualitative summary of what the computed numbers mean in practical terms.