1
Simpson's diversity index
- considers species richness and evenness
- calculates the
probability that any two species drawn at random from a collection,
will produce
two different species - ranges between 0 and 1, with value closer to 0 meaning there is high diversity
2
Shannon diversity index H'
- considers species richness and relative abundance
- Hmax = ln(S) occurs when all species have same relative abundance (maximum evenness)
- higher score of H' is more diverse
- H'<1.5 = low diversity
- 1.5<H'< 3.5 = moderate diversity
- H'>3.5 = high diversity
3
Simpson's evenness index
- ranges from 0-1, 1= complete evenness
4
Shannon evenness
- compares the abundance of each species in the community
- E ranges from 0-1, 1= complete evenness