Open Access
Table 1.
Example of composite indices of biodiversity
| Indicator | Méthode de calcul |
|---|---|
| Species number | S = Σ si avec si : ith species |
| Shannon Index | H’ = - Σ pi . Ln pi
(a) with pi = proportion of species i (entre 0 et 1) |
| Evenness | E = H’/Ln S |
| Simpson’s Index | D = Σ pi 2 |
| Reciprocal Simpson’s index | 1/D |
| Buckland arithmetic Occurrence index: | BuckArith-OI= 100/S Σ Oi /Ri with Oi = site number where species i is observed Ri = site number where species i was observed |
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