Use our free Species Richness Index Calculator to quickly determine biodiversity using Margalef's index. Input the number of unique species and the total number of individuals observed in your sample to get an instant richness value. Essential for ecological studies and conservation efforts.
Formula:
The Species Richness Index (Margalef's d) is calculated using the formula:d = (S - 1) / ln(N)
Where:
- S = Total number of unique species observed
- N = Total number of individuals across all species observed
- ln = Natural logarithm