Calculating The Indicator Value
To calculate the indicator value of a given species, the equation IndValij = Aij * Bij * 100 is used.
Aij = Nindividualsij/Nindividualsi
ij = The average amount of the species i in zone j (abundance)
i = Mean values for i in all zones
Bij = Nsitesij/NSitesi.
ij = Number of sites in zone j where species i is present (frequency)
i = Number of sites in zone j
Finally, IndValij = Aij * Bij * 100
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